DEP SPECIFICATION
Copyright Shell Group of Companies. No reproduction or networking permitted without license from Shell. Not for resale
LINE PIPE FOR CRITICAL SERVICE
(AMENDMENTS/SUPPLEMENTS TO ISO 3183:2012 AND
API SPEC 5L 45th EDITION)
DEP 31.40.20.37-Gen.
February 2017
DESIGN AND ENGINEERING PRACTICE
DEM1
© 2017 Shell Group of companies
All rights reserved. No part of this document may be reproduced, stored in a retrieval system, published or transmitted, in any form or by any means, without the prior
written permission of the copyright owner or Shell Global Solutions International BV.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 2
PREFACE
DEP (Design and Engineering Practice) publications reflect the views, at the time of publication, of Shell Global Solutions
International B.V. (Shell GSI) and, in some cases, of other Shell Companies.
These views are based on the experience acquired during involvement with the design, construction, operation and
maintenance of processing units and facilities. Where deemed appropriate DEPs are based on, or reference international,
regional, national and industry standards.
The objective is to set the standard for good design and engineering practice to be applied by Shell companies in oil and
gas production, oil refining, gas handling, gasification, chemical processing, or any other such facility, and thereby to help
achieve maximum technical and economic benefit from standardization.
The information set forth in these publications is provided to Shell companies for their consideration and decision to
implement. This is of particular importance where DEPs may not cover every requirement or diversity of condition at each
locality. The system of DEPs is expected to be sufficiently flexible to allow individual Operating Units to adapt the
information set forth in DEPs to their own environment and requirements.
When Contractors or Manufacturers/Suppliers use DEPs, they shall be solely responsible for such use, including the
quality of their work and the attainment of the required design and engineering standards. In particular, for those
requirements not specifically covered, the Principal will typically expect them to follow those design and engineering
practices that will achieve at least the same level of integrity as reflected in the DEPs. If in doubt, the Contractor or
Manufacturer/Supplier shall, without detracting from his own responsibility, consult the Principal.
The right to obtain and to use DEPs is restricted, and is typically granted by Shell GSI (and in some cases by other Shell
Companies) under a Service Agreement or a License Agreement. This right is granted primarily to Shell companies and
other companies receiving technical advice and services from Shell GSI or another Shell Company. Consequently, three
categories of users of DEPs can be distinguished:
1)
Operating Units having a Service Agreement with Shell GSI or another Shell Company. The use of DEPs by these
Operating Units is subject in all respects to the terms and conditions of the relevant Service Agreement.
2)
Other parties who are authorised to use DEPs subject to appropriate contractual arrangements (whether as part of
a Service Agreement or otherwise).
3)
Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1) or 2)
which requires that tenders for projects, materials supplied or - generally - work performed on behalf of the said
users comply with the relevant standards.
Subject to any particular terms and conditions as may be set forth in specific agreements with users, Shell GSI disclaims
any liability of whatsoever nature for any damage (including injury or death) suffered by any company or person
whomsoever as a result of or in connection with the use, application or implementation of any DEP, combination of DEPs
or any part thereof, even if it is wholly or partly caused by negligence on the part of Shell GSI or other Shell Company. The
benefit of this disclaimer shall inure in all respects to Shell GSI and/or any Shell Company, or companies affiliated to these
companies, that may issue DEPs or advise or require the use of DEPs.
Without prejudice to any specific terms in respect of confidentiality under relevant contractual arrangements, DEPs shall
not, without the prior written consent of Shell GSI, be disclosed by users to any company or person whomsoever and the
DEPs shall be used exclusively for the purpose for which they have been provided to the user. They shall be returned
after use, including any copies which shall only be made by users with the express prior written consent of Shell GSI. The
copyright of DEPs vests in Shell Group of companies. Users shall arrange for DEPs to be held in safe custody and Shell
GSI may at any time require information satisfactory to them in order to ascertain how users implement this requirement.
All administrative queries should be directed to the DEP Administrator in Shell GSI.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 3
TABLE OF CONTENTS
PART I
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
INTRODUCTION ....................................................................................................... 6
SCOPE ....................................................................................................................... 6
DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS ......... 6
DEFINITIONS ............................................................................................................. 7
CROSS-REFERENCES ............................................................................................. 7
SUMMARY OF MAIN CHANGES ............................................................................... 8
COMMENTS ON THIS DEP ....................................................................................... 8
DUAL UNITS............................................................................................................... 8
NON NORMATIVE TEXT (COMMENTARY) .............................................................. 9
PART II
1.1
1.2
1.3
1.4
1.5
GENERAL REQUIREMENTS .................................................................................. 10
GENERAL ................................................................................................................. 10
APPLICATION .......................................................................................................... 10
PRINCIPAL'S ACCESS AND ACTIVITIES............................................................... 11
PIPE FOR INDUCTION BENDS ............................................................................... 11
SMALL PIPE ORDER QUANTITIES ........................................................................ 12
PART III
AMENDMENTS/SUPPLEMENTS TO ISO 3183:2012 and API SPEC 5L 45
EDITION ................................................................................................................... 13
1
Scope ....................................................................................................................... 13
2
2.3
Conformance ........................................................................................................... 13
Compliance to this International Standard ................................................................ 13
3
Normative references ............................................................................................. 13
4
4.18
4.36
Terms and definitions ............................................................................................ 13
EW pipe .................................................................................................................... 13
Manufacturer ............................................................................................................. 13
5
5.2
Symbols and abbreviated terms ........................................................................... 13
Abbreviated terms ..................................................................................................... 13
6
6.1
6.2
Pipe grade, steel grade and delivery condition ................................................... 14
Pipe grade and steel grade ....................................................................................... 14
Delivery condition...................................................................................................... 14
7
7.1
7.2
Information to be supplied by the purchaser ...................................................... 14
General information .................................................................................................. 14
Additional information ............................................................................................... 14
8
8.1
8.3
8.4
8.6
8.7
8.8
8.9
8.10
8.11
8.12
8.13
Manufacturing ......................................................................................................... 15
Process of manufacture ............................................................................................ 15
Starting materials ...................................................................................................... 15
Tack welds ................................................................................................................ 15
Weld seams in SAW pipe ......................................................................................... 15
Weld seams in double-seam pipe............................................................................. 16
Treatment of weld seams in EW and LW pipes ........................................................ 16
Cold sizing and cold expansion ................................................................................ 16
Coil/plate end welds .................................................................................................. 16
Jointers ..................................................................................................................... 16
Heat treatment .......................................................................................................... 16
Traceability................................................................................................................ 16
th
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 4
9
9.1
9.2
9.3
9.4
9.6
9.8
9.9
9.10
9.11
9.12
9.13
9.14
9.15
Acceptance criteria ................................................................................................. 17
General ..................................................................................................................... 17
Chemical composition ............................................................................................... 17
Tensile properties ..................................................................................................... 19
Hydrostatic test ......................................................................................................... 19
Flattening test ........................................................................................................... 19
CVN impact test for PSL2 pipe ................................................................................. 20
DWT test for PSL2 welded pipe................................................................................ 22
Surface conditions, imperfections and defects ......................................................... 22
Dimensions, mass and tolerances ............................................................................ 22
Finish of pipe ends .................................................................................................... 24
Tolerances for the weld seam ................................................................................... 24
Tolerances for mass ................................................................................................. 25
Weldability of PSL2 pipe ........................................................................................... 25
10
10.1
10.2
Inspection ................................................................................................................ 25
Types of inspection and inspection documents ........................................................ 25
Specific inspection .................................................................................................... 26
11
11.1
11.2
11.3
Marking .................................................................................................................... 33
General ..................................................................................................................... 33
Pipe markings ........................................................................................................... 33
Coupling markings .................................................................................................... 34
12
12.2
Coatings and thread protectors ............................................................................ 34
Thread protectors...................................................................................................... 34
14
Pipe loading............................................................................................................. 34
Annex A
(normative) Specification for welded jointers ...................................................... 35
Annex B
B.1
B.2
B.3
B.4
B.5
B.6
B.7
B.8
(normative) Manufacturing procedure qualification for PSL2 pipe ................... 36
General ..................................................................................................................... 36
Additional information to be supplied by the purchaser ............................................ 36
Characteristics of the manufacturing procedure specification .................................. 36
Characteristics of the inspection and test plan ......................................................... 37
Manufacturing procedure qualification tests ............................................................. 38
Requalification of manufacturing procedure ............................................................. 40
HFW – Parameter envelope ..................................................................................... 40
Surface of seamless pipe ......................................................................................... 41
Annex C
C.2
(normative) Treatment of surface imperfections and defects ............................ 42
Treatment of dressable surface defects ................................................................... 42
Annex D
D.1
D.2
(normative) Repair welding procedure ................................................................. 43
General ..................................................................................................................... 43
Repair welding procedure qualification ..................................................................... 43
Annex E
(normative) Non-destructive inspection for other than sour service or
offshore service ...................................................................................................... 44
Qualification of personnel ......................................................................................... 44
Standard practices for inspection ............................................................................. 44
Methods of inspection ............................................................................................... 44
Radiographic inspection of weld seams ................................................................... 47
Ultrasonic and electromagnetic inspection ............................................................... 47
Residual magnetism ................................................................................................. 54
Laminar imperfections in the pipe body of EW, SAW and COW pipes .................... 54
Laminar imperfections along the strip/plate edges or pipe weld seam of EW,
SAW and COW pipes ............................................................................................... 54
Laminar imperfections in the pipe body of SMLS pipes ........................................... 55
Thickness measurements for SMLS pipes ............................................................... 55
E.1
E.2
E.3
E.4
E.5
E.7
E.8
E.9
E.11
E.12
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 5
Annex F
(normative) Requirements for couplings (PSL 1 only) ....................................... 56
Annex G
G.1
G.6
(normative) PSL 2 pipe with resistance to ductile fracture propagation .......... 57
General ..................................................................................................................... 57
Guidance for determining CVN absorbed energy values in buried onshore gas
pipelines .................................................................................................................... 57
EPRG guidelines – Approach 1 ................................................................................ 57
Battelle simplified equation – Approach 2 ................................................................ 57
Battelle two-curve method – Approach 3 .................................................................. 57
AISI method – Approach 4 ........................................................................................ 57
Full-scale burst testing – Approach 5 ....................................................................... 57
G.7
G.8
G.9
G.10
G.11
Annex H
H.2
H.3
H.4
H.7
H.9
(normative) PSL 2 pipe ordered for sour service ................................................ 58
Additional information to be supplied by the purchaser ............................................ 58
Manufacturing ........................................................................................................... 58
Acceptance criteria ................................................................................................... 59
INSPECTION ............................................................................................................ 60
PSL 2 pipe ordered for sour service – Additional requirements to comply with
Canadian Standard CSA Z662 ................................................................................. 62
Modifications to (PART III AMENDMENTS/SUPPLEMENTS TO ISO 3183:2012) 3
Normative references ............................................................................................. 62
9.9
DWT test for PSL2 welded pipe................................................................................ 62
H.5
Surface conditions, imperfections and defects ......................................................... 63
H.7
Inspection .................................................................................................................. 63
Annex I
(normative) Pipe ordered as “Through the Flowline" (TFL) pipe....................... 65
Annex J
J.2
J.3
J.6
J.7
J.8
(normative) PSL 2 pipe ordered for offshore service.......................................... 66
Additional information to be supplied by the purchaser ............................................ 66
Manufacturing ........................................................................................................... 66
Tolerances for diameter, wall thickness, length and straightness ............................ 68
Tolerances for the weld seam ................................................................................... 68
Inspection .................................................................................................................. 68
Annex K
(normative) Non-destructive inspection for pipe ordered for sour and/or
offshore service ...................................................................................................... 70
General non-destructive inspection requirements and acceptance criteria.............. 70
Non-destructive inspection of SMLS pipe ................................................................. 70
Non-destructive inspection of HFW pipe .................................................................. 71
Non-destructive inspection of SAW pipe .................................................................. 72
K.2
K.3
K.4
K.5
Annex M
(normative) Pipe ordered for European onshore natural gas transmission
lines .......................................................................................................................... 75
PART IV
REFERENCES ......................................................................................................... 76
APPENDICES
APPENDIX 1
LINE PIPE SUBJECTED TO HIGH STRAIN .................................................. 79
APPENDIX 2
APPENDIX 3
WELDABILITY OF PSL2 PIPE ....................................................................... 82
LINE PIPE FOR DEEPWATER PROJECTS, INCLUDING STEEL
CATENARY RISERS ...................................................................................... 85
APPENDIX 4
PROCEDURE REQUIREMENTS FOR NDT ................................................... 88
APPENDIX 5
LINE PIPE ORDER FORM .............................................................................. 89
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 6
PART I
1.1
INTRODUCTION
SCOPE
This DEP specifies requirements and gives recommendations for the manufacture and
supply of carbon and low-alloy steel line pipe for use in pipelines in critical service.
Guidance on the evaluation of pipeline service criticality and line pipe selection is given in
DEP 31.40.00.10-Gen.
See (Part II 1.2) for applications of this DEP.
This DEP is applicable only to grades L245 up to L555 (X80) as designated in
th
ISO 3183:2012 and API SPEC 5L 45 Edition.
th
This DEP is based on ISO 3183 Third Edition 2012 and API SPEC 5L 45 Edition. Part III
of this DEP amends, supplements and deletes various clauses of ISO 3183 and
API SPEC 5L (PSL2). Part III follows the clause numbering of ISO 3183 and
API SPEC 5L (PSL2) for easy reference.
th
The amendments and supplements in this DEP apply equally to API SPEC 5L, 45 edition
(PSL2), which contains the identical section numbers and content, with the exception of
minor deviations listed in Annex M, N and O.
This DEP contains mandatory requirements to mitigate process safety risks in accordance
with Design Engineering Manual (DEM) 1 – Application of Technical Standards.
This is a revision of the DEP of the same number dated February 2013; see (1.5) regarding
the changes.
1.2
DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS
Unless otherwise authorised by Shell GSI, the distribution of this DEP is confined to Shell
companies and, where necessary, to Contractors and Manufacturers/Suppliers nominated
by them. Any authorised access to DEPs does not for that reason constitute an
authorisation to any documents, data or information to which the DEPs may refer.
This DEP is intended for use in facilities related to oil and gas production, gas handling, oil
refining, chemical processing, gasification, distribution and supply/marketing. This DEP
may also be applied in other similar facilities.
When DEPs are applied, a Management of Change (MOC) process shall be implemented;
this is of particular importance when existing facilities are to be modified.
If national and/or local regulations exist in which some of the requirements could be more
stringent than in this DEP, the Contractor shall determine by careful scrutiny which of the
requirements are the more stringent and which combination of requirements will be
acceptable with regards to the safety, environmental, economic and legal aspects. In all
cases, the Contractor shall inform the Principal of any deviation from the requirements of
this DEP which is considered to be necessary in order to comply with national and/or local
regulations. The Principal may then negotiate with the Authorities concerned, the objective
being to obtain agreement to follow this DEP as closely as possible.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 7
1.3
DEFINITIONS
1.3.1
General definitions
The Contractor is the party that carries out all or part of the design, engineering,
procurement, construction, commissioning or management of a project or operation of a
facility. The Principal may undertake all or part of the duties of the Contractor.
The Manufacturer/Supplier is the party that manufactures or supplies equipment and
services to perform the duties specified by the Contractor. In ISO 3183:2012 and API
th
SPEC 5L 45 Edition the term Manufacturer is used. In this DEP, the term
Manufacturer/Supplier is considered to be equivalent to Manufacturer.
The Principal is the party that initiates the project and ultimately pays for it. The Principal
may also include an agent or consultant authorised to act for, and on behalf of, the
th
Principal. In ISO 3183:2012 and API SPEC 5L 45 Edition the term Purchaser is used. In
this DEP, the term Purchaser is considered to be equivalent to Principal.
The word shall indicates a requirement.
The capitalised term SHALL [PS] indicates a process safety requirement.
The word should indicates a recommendation.
The word may indicates a permitted option.
1.3.2
1.3.3
1.4
Specific definitions
Term
Definition
Critical Line
Pipe
Line pipe that meets any of the criteria of (Part II 1.2)
Not Very
Toxic
Refer to Part III of DEP 01.00.01.30-GEN.
Non-Critical
Line Pipe
Line pipe that does not meet any of the criteria of (Part II 1.2)
Rich Gas
(Need a definition for section 9.8.3)
Abbreviations
Term
Definition
MPQ
Manufacturing Procedure Qualification
CROSS-REFERENCES
Where cross-references to other parts of this DEP are made, the referenced section or
clause number is shown in brackets ( ). Other documents referenced by this DEP are listed
in (Part IV).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 8
1.5
SUMMARY OF MAIN CHANGES
This DEP is a revision of the DEP of the same number dated February 2013. The changes
followed a requirements quality review and were not a full technical updated. The following
are the main, non-editorial changes.
1.6
Section/Clause
Change
All
Restructured and clarified requirements, enforced use of
shall/should/may for normative statements.
Part II 1.2
Application
List of DEP applications demoted from Shall [PS] to “shall” in line
with DEP 31.40.00.18 (8.2.1) and since intent is only to list
application of the DEP. Individual Shall [PS] statements stand
alone later in the DEP.
Part III 2
Conformance
Quality Assurance System demoted from Shall [PS] to “shall”
which aligns with other DEPs.
Part III 10.2.5.3
Magnification requirement for metallographic examination of
HFW pipe has been separated from the parent Shall [PS]
requirement and stated as a “shall” requirement.
COMMENTS ON THIS DEP
Comments on this DEP may be submitted to the Administrator using one of the following
options:
Shell DEPs Online
(Users with access to
Shell DEPs Online)
Enter the Shell DEPs Online system at
https://www.shelldeps.com
Select a DEP and then go to the details screen for
that DEP.
Click on the “Give feedback” link, fill in the online
form and submit.
DEP Feedback System
(Users with access to
Shell Wide Web)
DEP Standard Form
(other users)
Enter comments directly in the DEP Feedback
System which is accessible from the Technical
Standards Portal http://sww.shell.com/standards.
Select “Submit DEP Feedback”, fill in the online form
and submit.
Use DEP Standard Form 00.00.05.80-Gen. to record
feedback and email the form to the Administrator at
standards@shell.com.
Feedback that has been registered in the DEP Feedback System by using one of the above
options will be reviewed by the DEP Custodian for potential improvements to the DEP.
1.7
DUAL UNITS
This DEP contains both the International System (SI) units, as well as the corresponding
US Customary (USC) units, which are given following the SI units in brackets. When
agreed by the Principal, the indicated USC values/units may be used.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 9
1.8
NON NORMATIVE TEXT (COMMENTARY)
Text shown in italic style in this DEP indicates text that is non-normative and is provided as
explanation or background information only.
Non-normative text is normally indented slightly to the right of the relevant DEP clause.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 10
PART II GENERAL REQUIREMENTS
1.1
GENERAL
Part III of this DEP is written as amendments and supplements to ISO 3183:2012 and
th
API SPEC 5L 45 edition. Wherever reference is made to ISO 3183:2012 and/or
th
API SPEC 5L 45 edition, it shall be understood to mean ISO 3183:2012 and/or
th
API SPEC 5L 45 edition as amended/supplemented by this DEP.
For ease of reference, the clause numbering of ISO 3183:2012 and
th
API SPEC 5L 45 edition have been used throughout Part III of this DEP.
th
Clauses in ISO 3183:2012 and API SPEC 5L 45 edition which are not mentioned in this
DEP shall remain valid as written.
Tables and figures in this DEP not replacing the corresponding item in ISO 3183:2012 and
th
API SPEC 5L 45 edition are numbered related to the DEP section they are contained in
(e.g., Figure 10.2.5.3).
1.2
APPLICATION
1.
Carbon steel and low alloy line pipe shall be ordered using this DEP for any of the
following applications:
a.
all offshore pipelines;
b.
all pipelines designed for sour service;
c.
all pipelines subject to high strain above normal elastic design limits (more than
0.5%) in installation or service;
d.
all line pipe ordered with resistance to ductile fracture propagation;
e.
all line pipe with a maximum design pressure greater than 40 barg (580 psig);
f.
all pipelines that have been designed with a design factor higher than 0.5;
g.
all pipelines designed for the transportation of category D or category E fluids, as
defined per ISO 13623 Section 5, Table 1;
h.
all pipelines of a diameter greater than NB 10 inch (273 mm), unless in only
Category A service;
i.
all pipelines forming a part of a main transportation infrastructure;
j.
the minimum pipeline design temperature is less than 0 °C (32 °F).
2.
Line pipe not meeting any of the requirements listed in (Part II 1.2, item 1) may be
ordered in accordance with ISO 3183 or API SPEC 5L PSL2 without amendment.
3.
Line pipe for Category A fluids (e.g., water) with a maximum design pressure of
20 Barg (2900 psig) and a minimum design temperature greater than 0 °C (32 °F) and
a NB of 20 inch (508 mm) or less may be ordered in accordance with ISO 3183:2012
or API SPEC 5L 45th edition PSL1.
4.
Line pipe for Category A fluids meeting the requirements of (Part II 1.2 item 2) but is
above NB 20 inch (508 mm) shall be ordered to PSL2.
5.
SAWH line pipe should be used for onshore applications where the outer diameter and
wall thickness requirements are within the manufacturing range for SAWH line pipe
(above 610 mm (24 in)).
Below this size HFW is generally used.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 11
6.
SAWH line pipe shall not be used for any of the following applications:
a.
where OD of the seam welds are at risk of corrosion due to water drop out;
SAWH pipe may be considered but requires analysis of the service conditions
and potential for corrosion on a helical weld seam.
7.
1.3
b.
where the use of reliability-based limit state design principles is required to
confirm design or operational integrity;
c.
in sour service.
Prior to order placement, the pipe mill and all sources of coil shall be subject to
approval by the Principal.
PRINCIPAL'S ACCESS AND ACTIVITIES
1.
Principal’s representatives shall be permitted to witness all chemical testing,
mechanical testing, and equipment calibration, and to inspect all pipe.
2.
Sufficient notice (at least 14 days) shall be given of the time at which the production
run is to begin.
3.
The Principal’s representatives shall have free entry at all times to all parts of the
Manufacturer’s works that will concern the manufacture, testing, inspection, quality
control and shipping of the pipe ordered.
This includes the steel mill and the pipe mill.
4.
The Manufacturer shall make available to the Principal all reasonable facilities to
inspect, measure, and test the pipe in all stages of production.
For example, this includes ultrasonic equipment for wall thickness confirmation.
1.4
5.
The Principal shall have the option to examine all materials rejected for any reason.
6.
The Principal’s representative shall be informed of any pipe fractures occurring during
hydrostatic testing and of any test specimen that fails to meet the requirements for any
reason.
7.
All failed materials shall be retained until examined by the Principal’s representative.
8.
The Manufacturer shall allow the Principal to inspect each length of pipe after
manufacture and testing are completed but prior to loading for shipment.
PIPE FOR INDUCTION BENDS
1.
This DEP shall apply to mother pipe intended for induction bending.
2.
The composition, mechanical properties and dimensions of mother pipe intended for
induction bending shall be dictated by the dimensions and delivery condition of the
completed bends.
3.
Refer to DEP 31.40.20.33-Gen for requirements for completed bends.
4.
The composition, mechanical properties and dimensions of the mother pipe shall be
by agreement between the Manufacturer and the Principal.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 12
1.5
SMALL PIPE ORDER QUANTITIES
Where small quantities of pipe are required (less than a normal pipe mill order, e.g., for
spools induction bend mother pipe, or risers), options to consider are:
•
place an order with small volume pipe mills. A number of pipe mills, using bending
roll or press forming, mainly SAWL can often provide small quantities of pipe;
•
consider pipe in stock.
1.
Small pipe orders and those from stock shall be produced by a steel mill and pipe mill
technically approved by the Principal.
2.
Pipe from stock shall be evaluated and a gap analysis undertaken from actual
production data and the requirements of this DEP.
3.
Supplemental tests (e.g., NDT, mechanical, dimensional) deemed necessary from the
gap analysis shall be performed to ensure compliance to this DEP.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 13
th
PART III AMENDMENTS/SUPPLEMENTS TO ISO 3183:2012 and API SPEC 5L 45 EDITION
1
Scope
Replace the first paragraph with the following:
1.
Refer to (Part I, Section 1.1).
2
Conformance
2.3
Compliance to this International Standard
Replace this clause with the following:
1.
3
The Manufacturer/Supplier shall maintain and operate a quality assurance
system in accordance with ISO 9001 or an alternative standard approved by the
Principal.
Normative references
Add the following:
1.
See also (Part IV) of this DEP.
4
Terms and definitions
4.18
EW pipe
th
This section is 4.18 in ISO 3183:2012 and 4.17 in API SPEC 5L 45 edition.
Replace this clause with the following:
1.
4.36
Tubular pipe having one longitudinal weld seam produced by high frequency
electric current with a frequency equal to or greater than 100 kHz.
Manufacturer
Add the following:
1.
Where pipe manufacturing and/or heat treatment are subcontracted, the pipe mill
and/or the processor shall also be considered to be the Manufacturer/Supplier.
5
Symbols and abbreviated terms
5.2
Abbreviated terms
Add the following:
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 14
6
Pipe grade, steel grade and delivery condition
6.1
Pipe grade and steel grade
6.1.1
Delete this clause.
6.2
Delivery condition
6.2.1
Table 1 Pipe Grades, steel grades and delivery conditions
Add the following note:
Pipes fabricated from thermomechanical rolled material may not be suitable for hot
(induction) bending unless chemistry/strength is increased and/or specific post
bend heat treatments are undertaken.
7
Information to be supplied by the purchaser
Add the following:
1.
7.1
A standard line pipe order form is attached in (Appendix 5) which shall be used
for initial technical enquiries with pipe mills.
General information
b.
Delete PSL1
Add the following:
9.
Minimum and maximum design and operating temperature (for determination of
CVN, DWT and CTOD test temperature)
10. Intended service and installing method (e.g., reel installed gas or oil or dual
phase for determination of need for resistance to ductile fracture propagation,
sour service, high strain, and deep water)
7.2
Additional information
Add the following:
a)10) .
Diameter and out-of-roundness for pipes with D/t> 75
Information not applicable to this DEP:
a)9)
b)3), b)5), b)8), b)14)
c)2), c)5), c)7), c)13), c)14), c)18), c)19, c)25), c)31), c)44), c)45), c)53).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 15
8
Manufacturing
8.1
Process of manufacture
Table 2 – Acceptable processes of manufacture and product specification levels
Delete, “Double-seam SAWL and Double-seam COWL”
Delete Note c.
Delete Note d and substitute:
SAWH is applicable for 610 mm OD (24 inch) and above when specifically
approved by the Principal.
Add Note g:
HFW pipe with a wall thickness greater than 20.6 mm (0.8 in) shall be subject to
approval by the Principal.
Add Note h:
The welding processes used for COW pipe shall be subject to approval by the
Principal.
8.3
Starting materials
8.3.10
Add new clause:
1.
The abutting edges of strip or plate to be HFW welded shall be milled or
machined.
2.
Rotary shearing shall not be considered as machining.
3.
Where approved by the Principal, rotary shearing may be used only for pipe of
8 mm (0.315 in) wall thickness or less, with a diameter of pipe of 273 mm (10 in)
or less, and with a pipeline design temperature of not less than -10 °C.
Add new clause:
8.3.11
Centerline segregation of slabs, plate and coil.
1.
8.4
The procedure for evaluation of centerline segregation, including quality evaluation
method and acceptance limits, shall be subject to approval of the Principal.
Tack welds
8.4.2
Replace this clause with the following:
1.
8.6
Tack welds shall be:
a.
made using a continuous single pass;
b.
melted and coalesced into the final weld seam; and
c.
removed by machining or treated in accordance with Clause C.2.
Weld seams in SAW pipe
Add the following:
1.
The seam welding of SAWH pipe shall be carried out as a separate process from
the forming operation (e.g., a 2 step mill where the welding speed is independent
of the forming speed).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 16
8.7
Weld seams in double-seam pipe
Delete this clause.
8.8
Treatment of weld seams in EW and LW pipes
8.8.1
PSL 1 EW Pipe
Delete this clause.
8.9
Cold sizing and cold expansion
8.9.2
Replace this clause with the following:
8.10
1.
Cold expansion shall be performed by mechanical means only.
2.
The sizing ratio for cold-expanded pipe shall not be less than 0.008 or more than
0.015.
Coil/plate end welds
Replace this clause with the following:
1.
8.11
Pipe containing strip end welds shall not be supplied.
Jointers
Replace this clause with the following:
1.
8.12
Jointers shall not be supplied.
Heat treatment
Add the following:
1.
8.13
The Manufacture shall supply the following information concerning the heat
treatment facility, subject to approval by the Principal:
a.
type of furnace (e.g., batch, walking beam);
b.
method of heating and fuel (if applicable);
c.
number, position of thermocouples and controlled heating zones;
d.
calibration frequency of the thermocouples;
e.
arrangement of pipes with furnace;
f.
identification and control of individual pipes throughout the heat treatment
cycle.
Traceability
8.13.1
Delete this clause.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 17
9
Acceptance criteria
9.1
General
9.1.2
Replace this clause with the following:
1.
9.2
Pipe manufactured to a specific grade shall not be substituted for pipe ordered as
a lower grade.
Chemical composition
9.2.1
Delete this clause.
9.2.2
Replace this clause with the following:
1.
Annex J Table J1 shall apply for all pipe grades and for pipe with t ≤ 35 mm (1.38
in) other than for sour service.
2.
(Annex H Table H.1) shall apply for pipe with sour service.
3.
Review ISO 3183 composition limits in Annex M.
9.2.3
Replace this clause by:
1.
The composition limits of pipe with t > 35 mm (1.38 in) shall be by agreement or
as stated in the purchase order.
Delete this table:
Table 4
Chemical composition for PSL 1 pipe with t ≤ 25.0 mm (0.984 in)
Replace this table with Annex J Table J1:
Table 5
Chemical composition for PSL 2 pipe with t ≤ 25.0 mm (0.984 in)
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 18
Add this clause:
9.2.6
Chemical Composition Tolerances
1.
The Manufacturer/Supplier’s target product analysis shall be shown in the
Manufacturing Procedure Specification.
2.
A single value target of CEiiw or CEpcm shall be stated.
3.
The range of elements shall be such that the variation in the single value target CEiiw
does not exceed ± 0.03 units or CEpcm does not exceed ± 0.02 units with the
additional restrictions of Table 9.2.6.3:
Table 9.2.6.3 Element Restrictions
The figures of Table 9.2.6.3 represent the total range and not a plus or minus
tolerance.
4.
There shall be no changes in the chemical composition (within the tolerances listed
above) from the approved MPS composition.
a.
5.
No intentionally added elements shall be increased beyond the limits above or
removed.
The chemical composition recorded for the pipes used in first-day production testing
shall set the reference CE.
a.
Where any of the elements in Table 9.2.6.3 is not intentionally added, the
manufacturer may propose maximum values, subject to approval by the Principal.
6.
If any part of any specific order is manufacturered outside this range then additional
MPQT, including weldability tests when applicable, shall be performed on three
selected pipes from the heat.
7.
The chemical analysis and reporting in inspection documents shall include all
elements covered by the requirements of Annex J Table J1.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 19
9.3
Tensile properties
9.3.1
Delete this clause.
Delete this table.
Table 6 Requirements for the results of tensile tests for PSL 1 pipe
9.3.1
Replace this clause with:
1.
For PSL 2 pipe, the tensile properties shall be as given in Annex J Table J2.
Use Annex J Table J2 in leu of Table 7.
Review if J2 should be applied with max tolerances.
9.4
Hydrostatic test
9.4.2
Delete this clause.
9.6
Flattening test
Replace this clause with the following:
1.
No cracks or breaks shall occur in either weld or parent metal during flattening of
the test specimen to 50% of the original OD.
2.
The specimen shall be further flattened to 1/3 of original OD without cracks or
breaks other than in the weld.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 20
9.8
CVN impact test for PSL2 pipe
9.8.1.1
Consider the DNV criteria for sub sized specimen.
9.8.2
Pipe body tests
9.8.2.1
Replace this clause with the following:
1.
The minimum average (of a set of three test pieces) absorbed energy for each
pipe body test shall be as given in Table 8, based upon full-size test pieces.
2.
The test temperature shall be lower than or equal to that specified in
Table 9.8.2.1.
Table 9.8.2.1 Test temperature
Tmin is the minimum design temperature
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 21
9.8.2.2
Add to this clause:
1.
Shear requirements on charpy specimen shall apply to base material only.
Replace Table 8 with the following:
1.
No individual specimen shall be less than 60% of the specified value.
Table 8
9.8.3
CVN absorbed energy requirements for PSL2 pipe
Pipe weld and HAZ tests
Replace this clause with the following:
1.
The absorbed energy requirements for weld and HAZ tests SHALL [PS] be as
specified in Table 8 of this DEP.
2.
If any specimen displays a value less than 60% of the value in Table 8, the
Manufacturer shall fully investigate the cause and advise the Principal.
3.
For pipelines in rich gas or CO2 service and pipelines subjected to high strain,
the values in Table 8 may be increased on a project-by-project basis,
4.
The test temperature shall be as specified for the pipe body.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 22
9.9
DWT test for PSL2 welded pipe
9.9.1
Replace this clause with the following:
1.
For each test (a set of two test pieces), the average shear fracture shall be ≥ 85%
with no individual specimen less than 50% shear area.
2.
The test shall be performed at the minimum design temperature specified in the
order form (Appendix 5).
3.
Where it is not possible to test a full thickness specimen, the test temperature
shall be adjusted in accordance with API RP3.
9.10
Surface conditions, imperfections and defects
9.10.5
Geometric deviations
9.10.5.2
Replace this clause with the following:
1.
For dents, the length in any direction shall not exceed 25% of the pipe diameter.
2.
All sharp gouges (with or without dent) of 1 mm (0.04 in) or greater depth shall be
considered a defect.
3.
Cold formed dents without sharp bottom gouges are acceptable to a maximum
depth of 3.2 mm (0.125 in).
Add new clause:
9.10.5.3 Surface condition – seamless pipe
9.11
1.
The external surface of all seamless pipes shall be free from scabs, laps, shells,
slivers, burrs, metallurgical tears and sharp edged discontinuities that may interfere
with the application of thin film (e.g., FBE) coatings and multi-layer coatings where
FBE forms the first layer.
2.
Prior to manufacturing procedure qualification, the manufacturer shall submit, for
approval by the Principal, acceptance criteria for the surface condition of all seamless
pipe, together with historic evidence of the successful FBE coating of such pipe
without excessive remedial work.
3.
In the absence of historic data, seamless pipe shall undergo blast cleaning and
examination of three pipes during manufacturing procedure qualification and one pipe
per 10 test units during production.
4.
The pipes shall be selected at random and heated to a minimum of 70 °C (160 °F).
5.
The outside surface of the pipe shall be blast cleaned to a surface finish of SA2½ and
the pipe then re-heated to 270 °C (520 °F).
6.
Each pipe shall be examined visually over its entire surface for imperfections that
could interfere with the FBE coating process.
7.
If a seamless pipe(s) is rejected, the remaining pipes from the test unit, and one pipe
from each subsequent test unit, shall be blast cleaned and examined.
Dimensions, mass and tolerances
9.11.3.1
Replace this clause with the following:
1.
The diameter and out of roundness tolerances of Annex J Table J3, as amended
by this DEP, shall apply to all pipe ordered for onshore service.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 23
Replace this table with Annex J Table J3:
Table 10 Tolerances for diameter and out-of-roundness
9.11.3.2
Replace this clause with the following:
1.
The tolerances for wall thickness shall be as given in Annex J Table J4.
9.11.3.3
Replace Table 12 with the following:
1.
Length tolerance shall take into account the transportation and installation
methods.
Table 12
Tolerance for random length pipe
9.11.3.4
Amend this clause as follows:
a.
The total deviation from a straight line, over the entire pipe length, shall be
≤ 0.15% of the pipe length, as shown in Figure 1.
b.
The local deviation from a straight line at each end of 1 m (4 ft) section shall be
≤ 3.0 mm (0.12 in) as shown in Figure 2.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 24
9.12
Finish of pipe ends
9.12.1
General
9.12.1.1
Delete this clause.
9.12.2
Threaded ends (PSL1 only)
Delete this clause.
9.12.3
Belled ends (PSL1 only)
Delete this clause.
9.12.4
Belled ends (PSL1 only)
Delete this clause.
9.12.5.4
Replace this clause with:
1.
Internal machining or grinding shall not be done unless approved by the principal.
a.
The specific procedure shall be subject to approval by the principal.
b.
Machining or grinding for end dimensional tolerance shall be parallel with a
4:1 taper transistion.
9.12.5.5
Add to this clause:
1.
Outside and inside at pipe ends shall be deburred within 2mm.
9.13
Tolerances for the weld seam
9.13.1
Radial offset of strip/plate edges
Replace Table 14 with the following:
Table 14
Maximum permissible radial offset for SAW and COW pipes
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 25
9.13.2.2
Add the following:
b.
i.
For SAWH weld beads, the weld cap profile shall exhibit minimal or no
concavity.
ii.
For SAW and COW, the cap profile shall be subject to approval by the
Principal at MPS stage.
iii.
For SAWH, a sample acceptable weld cross section macro shall be retained
as a standard sample of acceptable cap profile.
Selection item e)
i.
9.14
The outside weld bead shall be removed by grinding for a distance of at least 150
mm (6 in) from pipe end for all pipe ordered.
Tolerances for mass
9.14.1
Replace items a), b) and c) with the following:
For all pipes:
+10.0%, -3.5%
9.14.3
Replace items a) and b) with the following:
For all grades:
9.15
-1.75%
Weldability of PSL2 pipe
Add the following:
1.
For all offshore pipelines and for other pipelines where specified in the order
form, weldability trials shall be carried out.
2.
The material shall be as qualified in the manufacturing procedure qualification
(Annex B), within the limits specified in (B.5).
The requirements for weldability testing are given in (Appendix 2).
10
Inspection
10.1
Types of inspection and inspection documents
10.1.1.2
Replace this clause with the following:
10.1.2
1.
Final inspection reports shall be supplied in both hard copy and searchable
electronic versions (e.g., PDF).
2.
Testing in which data curves are developed (e.g., Tensile, Compressive StressStrain, CTOD) shall be supplied as raw data formats such as can be imported
into a spreadsheet file.
Inspection documents for PSL1 pipe
Delete this clause.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 26
10.2
Specific inspection
10.2.1
Inspection frequency
10.2.1.1
Delete this clause and Table 17.
Replace Table 18 with the following:
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 27
Table 18
Inspection frequency for PSL 2 pipe
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 28
Delete this table:
Table 19
Number, orientation and location of test pieces per sample for
mechanical tests for PSL 1 pipe
Replace Table 20 with the following:
Table 20
Number, orientation and locations of test pieces per sample for
mechanical tests
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 29
10.2.3
Samples and test pieces for mechanical tests
10.2.3.3 Test pieces for the CVN impact test
Amend fourth paragraph as follows:
1.
For test pieces taken in the HAZ of SAW pipes, the axis of the notch shall be
positioned at the fusion line, fusion line + 2 mm (0.08 in) and fusion line + 5 mm
(0.2 in).
2.
The upper surface of the specimens shall be within 2 mm (0.08 in) of the outer
surface of the pipe. See Figure 7.
3.
SAW pipe of wall thickness greater than 25.4 mm (1 in) shall have four additional
sets of impact specimens, from weld centre line, fusion line, fusion line +2 mm
(0.08 in) and fusion line +5 mm (0.2 in), as shown in Figure 7 but with the lower
surface of the specimen within 2 mm (0.08 in) of the inner surface of the pipe.
In the fifth paragraph replace “as close as practicable” with “within 0.25 mm”.
Add the following:
4.
For test pieces taken from seamless pipes the specimens axis shall be aligned
with the mid-thickness of the pipe.
5.
The impact testing of seamless pipe with wall thickness equal to or greater than
25.4 mm (1 in) shall be as specified in the order form.
6.
Coupons/specimens shall not be flattened.
Amend Figure 7 as follows:
Figure 7 Location of Charpy test specimens for weld and HAZ tests
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 30
Add new clause:
10.2.3.8 Test pieces for CTOD test
10.2.4
1.
Test pieces shall be taken from the weld metal, the HAZ, and the parent metal.
2.
Test pieces shall be prepared in accordance with ISO 12135.
3.
Test specimens shall be Bx2B through thickness notched specimens.
4.
For weld metal test, the notch axis shall be located on the weld centre line.
5.
For HAZ specimens, the notch axis shal be located so as to sample the fusion line.
6.
The central 50% portion of the specimen shall sample the HAZ.
7.
The outer portions of the specimen shall sample weld metal.
Test methods
10.2.4.8 Hardness test
Add the following:
1.
For all pipe ordered for non- sour service, hardness surveys (Vickers) shall be
carried out as detailed in J.8.3.2 with the acceptance criteria specified in J.4.3.
2.
The frequency of testing shall be as required for impact testing by Table J.7.
3.
The requirements of (Annex H) shall apply to all pipe ordered for sour service.
Add new clause:
10.2.4.9 CTOD test
1.
CTOD testing shall be performed in accordance with ISO 12135.
2.
The test temperature shall be at the minimum design temperature as stated in the
order form
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 31
10.2.5
Macrographic and metallographic tests
10.2.5.2
Delete this clause.
10.2.5.3
Replace this clause with the following:
1.
For HFW pipe, a metallographic examination of the weld seam SHALL [PS] be
carried out.
2.
The metallographic examination shall be carried out at a magnification of at least
200 times.
3.
The frequency of a metallographic examination of the weld seam shall be as
follows:
a.
Manufacturing Qualification Test:
i.
One specimen shall be taken from each qualification pipe
ii.
The manufacturer shall record the following information:
1). Width of heat treated zone (unless full body heat treatment carried
out);
2). Grain size and microstructure of heat treated weld area;
3). Deformation angle (i.e., the angle by which the material adjacent
to the weld is displaced from the horizontal) or other means of
assessment of deformation or squeeze pressure during welding,
as agreed with Principal. (See Figure 10.2.5.3).
b.
iii.
The manufacturer shall produce acceptance criteria, subject to
approval by the Principal, based on the results of the manufacturing
qualification test.
iv.
These acceptance criteria shall be applied in production and shall
demonstrate that the entire weld heat affected zone has been heat
treated over the full wall thickness and is free of defects.
v.
The acceptance criteria shall include assessment of the grain size, and
general microstructure.
vi.
Metallographic examination shall include an assessment of the level of
deformation achieved during the welding operation (e.g., deformation
angle).
Production
i.
Metallographic examination shall be carried out at each of the following
frequencies to confirm full fusion and the criteria as stated in (10.2.5.3,
item 3.a):
1). one per five coils;
2). at least once per shift;
3). whenever the wall thickness or diameter changes; and
4). where there are excursions outside of the parameters agreed in
the MPS for the heat treatment time or temperature.
ii.
All measurements made against the criteria in (10.2.5.3, item 3.b.i)
shall be recorded.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 32
Figure 10.2.5.3
Deformation angle – HFW pipe
10.2.6.1
Replace this clause with the following:
1.
Test pressures for all pipe shall be held for not less than 10 seconds.
10.2.6.3
Delete this clause.
10.2.6.4
Delete this clause.
10.2.6.5
Replace the first sentence of this clause with the following:
1.
Except as allowed by 10.2.6.6 and 10.2.6.7, the hydrostatic test pressure, P,
expressed in megapascals (pounds per square inch), for plain-end pipe shall be
determined using Equation (6), with the results rounded to the nearest 0.1 MPa
(10 psi):
Delete this table:
Table 24 — Test pressures for light-wall threaded pipe
Delete this table:
Table 25 — Test pressures for heavy-wall threaded pipe
Delete this table:
Table 26 — Percentage of specified minimum yield strength for determination of
S
10.2.6.7
1.
The test pressure for all types and sizes of pipe shall be such that the hoop stress,
calculated on the basis of the minimum specified wall thickness (minimum wall
thickness to include deduction of thickness for mill tolerance) including stresses from
the end loading, is at least 95% of the specified minimum yield strength.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 33
10.2.7
Visual inspection
10.2.7.1
Add the following:
10.2.8
1.
For HFW and SAW pipes, the inspection shall include the internal weld profile.
2.
The entire internal surface of SAW pipes of outside diameter greater than
610 mm (24 in) shall be visually inspected.
Dimensional testing
10.2.8.1
Replace this clause with the following:
1.
The diameter of the first 10 pipes shall be measured.
2.
After the first 10 pipes, the diameter shall be measured once every 20 pipes but
not less than once per 4 hour shift.
3.
Unless a specific method is specified in the order form, diameter measurements
shall be made with a circumferential tape, ring gauge, snap gauge, calliper or
optical measuring device.
10.2.8.2
Replace this clause with the following:
1.
The out of roundness of the first 10 pipes shall be measured.
2.
After the first 10 pipes, the diameter shall be measured once every 20 pipes but
not less than once per 4 hour shift.
3.
The out of roundness shall be determined as the difference between the largest
inside diameter and the smallest inside diameter, as measured in the same
cross-sectional plane.
10.2.8.3
Delete this clause.
11
Marking
11.1
General
11.1.2
Delete this clause.
11.2
Pipe markings
11.2.1
Add the following:
k).
i.
Each pipe shall be uniquely indentified.
Add the following:
l).
i.
The applicable DEP number and project name shall be added.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 34
11.2.3
Replace this clause with the following:
a).
a.
Low stress die stamping or vibro etch marking is required only if specified in
the order forms.
i.
Low stress die stamping shall only be applied to the bevel face or plain
end.
ii.
Vibro etch marking may be applied within 150 mm (5.9 in) from the pipe
end.
Add new clause:
d). Die stampings shall be coated with a clear lacquer to prevent corrosion at the
location of the markings.
11.3
Coupling markings
Delete this clause.
12
Coatings and thread protectors
12.2
Thread protectors
Delete this clause.
14
Pipe loading
Add the following:
1.
If required by the order form, each end of each length of pipe shall be provided
with a suitable end protector designed to prevent damage to the weld prepared or
plain end.
2.
End protectors shall not be attached to the pipe using tape or other connectors.
3.
The end protector design shall be submitted to the Principal.
4.
The end protector design shall be conducive for using crane hooks for lifting.
Refer to the order form for protector requirements.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 35
Annex A (normative) Specification for welded jointers
Delete this annex.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 36
Annex B (normative) Manufacturing procedure qualification for PSL2 pipe
B.1
General
Replace this clause with the following:
1.
Manufacturing procedure qualification shall be required for all PSL2 pipe.
2.
Qualification shall be carried out on each combination of diameter and wall
thickness supplied.
3.
The qualified manufacturing procedure shall form the basis for pipe acceptance.
4.
Deviation from the qualified manufacturing procedure shall require full requalification in accordance with the requirements of (B.5).
5.
The Manufacturer shall inform the Principal within 48 hours of any intentional or
unintentional manufacturing deviations from the agreed procedures, dimensional
tolerances, or composition.
6.
The Manufacturer shall communicate manufacturing deviations even if the
finished line pipe meets the requirements of this DEP and ISO 3183:2012 and
th
API SPEC 5L 45 edition.
7.
The manufacturing procedure shall be qualified by selecting at random three of
the completely finished pipes of the first day’s production.
8.
If more than one heat is used in the first-day production pipes, at least two heats
shall be represented by the test pipes.
9.
All testing shall be performed on each test pipe.
10. For HFW pipe, the test pipes shall include the pipes made from each end of the
first coil of strip.
11. For orders less than 200 tonnes (220 tons), use of data from a previous order
shall be subject to approval by the Principal provided the pipe grade, size, and
manufacturing method are similar.
12. With Principal approval, part or all of the manufacturing procedure qualification
may be carried out prior to first day production, but shall use plate or coil ordered
for production and the same welding machines and procedure and NDT
equipment as proposed in production.
B.2
Additional information to be supplied by the purchaser
Delete list items a) and b) and replace by:
1.
B.3
Unless otherwise specified on the order form, qualification shall be in accordance
with (B.3, B.4 and B.5).
Characteristics of the manufacturing procedure specification
a.
steel making and casting — for all pipe
Add the following:
9.
b.
Quality plan detailing all inspection points and tests performed in
accordance with ISO 10005.
pipe manufacturing — for all pipe:
Replace this clause with the following:
1.
e.
Strip/plate manufacturing method including details of rolling conditions,
accelerated cooling conditions (if applied) and heat treatment method
(N or Q) if applicable.
pipe manufacture – for welded pipe:
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 37
Add the following:
3.
a.
For HFW pipe, the seam welding procedure shall include details of the
following:
III.
Methods to be used for heating strip edges and for the control and
monitoring of power input in relation to the temperature of the pipe
surface and the speed of the pipe;
IV. Frequency (in kHz) of the welding power supply;
V.
Welding speed
VI. Welding Temperature (or Principal approved alternative method of
monitoring weld quality).
VII. Welding power
VIII. Compressive force or displacement used in welding.
IX. Temperature of in-line normalising or normalizing and tempering (if
applied)
X.
Details of any protective atmosphere used for welding;
XI. Methods used to accomplish and control the upset welding of the
heated pipe edges;
XII. Methods used for trimming of the weld bead.
4.
for SAW and COW pipes:
Add the following
a.
For SAW pipe, the seam welding procedure shall include details of
the following:
V.
brand name, classification, size and grade of filler metal and
flux;
VI. speed of welding;
VII. number of electrodes and polarity for each electrode;
VIII. stickout for each wire;
IX. welding current for each wire;
X.
welding voltage for each wire.
Add new clause:
g.
B.4
For sour service pipe, the hydrogen-induced cracking test procedure shall include
full details of the exposure test method required by NACE TM0284 and
DEP 30.10.02.16-Gen. and full details of the procedure used for metallographic
preparation of the exposed test pieces.
Characteristics of the inspection and test plan
Add the following to the first paragraph
j.
Quality plan detailing all inspection points and tests performed in accordance with
ISO 10005.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 38
B.5
Manufacturing procedure qualification tests
B.5.2
Add the following:
The following additional tests apply:
B.5.2.1
Tensile tests – General
1.
Parent material and all weld metal tensile tests (at ambient and elevated temperature)
shall be conducted so as to record the full stress strain curve up to maximum load.
This applies to manufacturing procedure qualification testing only.
2.
B.5.2.2
B.5.2.3
B.5.2.4
Data shall be provided electronically in spreadsheet format.
Elevated temperature tensile tests
1.
Where required in the order form, elevated temperature tensile tests shall be taken in
both the longitudinal and, for pipes of outside diameter ≥ 219.1 mm (8.63 in), the
transverse direction.
2.
Testing shall be in accordance with a nationally recognized standard.
3.
The testing temperature and acceptance criteria shall be stated in the order form.
All weld tensile tests (SAW only)
1.
All weld tensile tests shall be performed on each of the first-day production test pipes.
2.
The tests results shall meet the minimum specified requirements of the plate with
regard to yield, tensile strength and achieve a minimum elongation value of 18%.
3.
The test method shall be in accordance with a nationally recognized standard.
4.
Where required in the order form, all weld tensile tests shall also be performed at
elevated temperature.
Impact tests
1.
2.
For each of the first-day production pipes, a full impact transition curve shall be
determined for all location specified in (10.2.3.3).
a.
Seamless shall be performed within the pipe body.
b.
HFW shall be performed within the parent material along weld centre line (within
0.25 mm from FL).
c.
SAW shall be performed within theparent material along weld centre line, fusion
line, fusion line +2 mm (0.08 in), and fusion line +5 mm (0.2 in).
At least 12 specimens shall be tested at each position at a temperature range wide
enough to obtain upper and lower shelf toughness impact energy values.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 39
B.5.2.6
B.5.2.7
CTOD testing (SAW only)
1.
CTOD testing shall be performed in accordance with ISO 12135.
2.
The test temperature shall be the minimum design temperature as stated in the order
form.
3.
Test pieces shall be taken from both the weld and HAZ.
4.
Test pieces shall be SENB type prepared in accordance with ISO 12135.
5.
Weld test specimens shall be through thickness notched with the notch being located
at the weld centreline.
6.
HAZ specimens shall be surface notched from the outside surface so that the fatigue
crack tip samples the HAZ within 0.5 mm (0.02 in) of the fusion line.
7.
The location of the fatigue crack tip shall be verified by post test sectioning and
metallography.
8.
Through thickness notched specimens shall be Bx2B and surface notched specimens
BxB.
9.
The minimum CTOD value (from a set of three specimens) taken from each of the
pipe, weld and HAZ locations, shall be as stated in the order form.
Strain aged testing
1.
B.5.2.8
Drop weight tear tests
1.
B.5.2.9
Where required by the order form, tensile Charpy impact, fracture toughness testing
and hardness testing shall be carried out in the strain aged condition according to
(Appendix 1).
In addition to the normal DWTT requirements, a full transition curve shall be
established for the parent material on each of the test pipes.
Radiography
1.
The weld seams of all SAW pipes shall be radiographically examined throughout their
full length.
B.5.2.10 PT or MT
1.
The weld seam shall be subjected to liquid penetrant or magnetic particle testing to
check for surface defects in the weld and adjacent HAZ.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 40
Add new clause:
B.6
Requalification of manufacturing procedure
1.
The following changes to the manufacturing procedure shall require full requalification
of the manufacturing procedure:
a.
Any change to the steel chemistry which produces a change in the CE of more
than +0.03 (see (9.2.2);
b.
Any change to the steel de-oxidation practice;
c.
A change from ingot casting to continuous casting or vice versa;
d.
Any change to the plate or pipe reduction ratio;
e.
A change in the finishing temperature during plate or strip rolling outside the
approved range;
f.
A change in the accelerated cooling start temperature outside the approved
range;
g.
A change in the finishing temperature outside the approved range, for pipe not
subject to further heat treatment;
h.
A change in the pipe heat treatment soaking temperature and soaking time;
i.
Any change to the welding procedure outside the essential variable limits of
ISO 9956-3. In addition for SAW pipe, a change in flux brand name and an
increase of more than 20 mm (0.8 in) in the wire stick-out.
Add new clause:
B.7
HFW – Parameter envelope
1.
2.
In addition to the essential variables stated in clause B.5, the Manufacturer shall
submit, subject to approval by the Principal, the maximum ranges of each of the
following parameters for each pipe diameter, thickness and material grade:
a.
Welding speed;
b.
Welding temperature (or Principal approved alternative method of monitoring
weld quality);
c.
Welding power;
d.
Compressive force or displacement.
The Manufacturer shall provide details, subject to approval by the Principal, on how
the parameters in (B.7, item 1) are to be monitored and recorded.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 41
Add new clause:
B.8
Surface of seamless pipe
1.
The Manufacturer shall provide historical evidence that the surface finish of previous
production was suitable for the application of FBE coatings.
2.
In the absence of the data in (B.8, item 1), three pipes from the first day's production
shall be selected at random and heated to a minimum of 70 °C (160 °F).
3.
The outside surface of the pipes shall be blast cleaned to a surface finish of SA2.5 and
the pipe re-heated to 270 °C (520 °F)
4.
Each pipe shall be examined visually over its entire surface for scabs, slivers, tears
and similar surface defects which may interfere with the application of FBE and other
coatings.
5.
Should the pipe fail to meet the required standard of surface finish, the Manufacturer
shall submit procedures for remedial action and subsequent testing of the production
material to guarantee suitability of the production material for FBE coating, for
approval by the Principal.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 42
Annex C (normative) Treatment of surface imperfections and defects
C.2
Treatment of dressable surface defects
C.2.2
Add the following:
1.
All ground areas shall be smoothly contoured at a minimum 3 to 1 slope.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 43
Annex D (normative) Repair welding procedure
D.1
General
D.1.2
1.
Repair welds shall be made by one or more of the following methods:
Delete this clause:
b). b)
D.2
Repair welding procedure qualification
D.2.3
Mechanical testing
D.2.3.4
Charpy (CVN) impact test
D.2.3.4.4
Add the following:
1.
The test temperature shall be the same as that required for the unrepaired
production pipe weld metal and HAZ.
Add new clause:
D.2.5
CTOD test
1.
The qualification of repaired weld shall be subject to the same CTOD testing as
required by (Annex B clause B.5.2).
2.
In the case of (D.2.5, item 1) surface notched specimens shall be used to sample the
weld metal and both HAZs (repair/parent material and repair weld/original weld).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 44
Annex E (normative) Non-destructive inspection for other than sour service or offshore
service
E.1
Qualification of personnel
Add the following:
1.
The qualifications of personnel shall be subject to approval by the Principal.
E.1.3
Add the following:
E.2
1.
The Manufacturer/Supplier shall have a NDT UT Level 3 available on call during
manufacture.
2.
All of the Manufacturer/Supplier NDT specifications and procedures shall clearly
state the approval of the NDT Level 3 showing approval date and qualification
number and the expiry date of the NDT Level 3 individual.
Standard practices for inspection
Add the following:
1.
A procedure shall be written for every technique describing the inspection
process, with as a minimum the essential variables stated in
(Appendix 4 Table 4.1).
E.3
Methods of inspection
E.3.1
General
E.3.1.1
Replace this clause with the following:
1.
The weld seams of welded pipe shall be inspected using the ultrasonic angle
beam shear wave method in accordance with ISO 10893-11:2011, over the full
length (100%) for the entire thickness, as given in Table E.1.
Acceptance levels: ISO Reference reflectors as shown in Table E.8.
2.
Inspection procedures including the use of ToFD shall only be used with the
approval of the Principal.
3.
Advanced ultrasonic techniques (e.g., phased array, EMAT) may only be
permitted by the approval of the Principal on the basis of a specific qualification
program approved by the Principal.
E.3.1.2
Replace this clause with the following:
1.
All SMLS pipe shall be non-destructively inspected full length (100%), as given in
Table E.2.
Applicable code: ISO 10893-10:2011 (longitudinal and transverse
imperfections).
E.3.1.3
Replace this clause with the following:
b). Welded pipe shall have final acceptance inspection after hydrostatic test.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 45
Replace Table E.1 with the following:
Table E.1 Pipe weld seam non-destructive inspection
Replace Table E.2 with the following:
Table E.2 SMLS pipe body non-destructive inspection
E.3.2
Pipe end inspection — Welded pipe
E.3.2.1
Replace this clause with the following:
1.
Pipe end weld seam: If an automated ultrasonic or electromagnetic inspection
system is applied to meet the requirements of (E.3.1.1), welds at any pipe ends
that are not covered by the automated inspection system shall be inspected for
defects by a manual or semi-automatic ultrasonic angle beam method, using the
same inspection sensitivity and inspection parameters as specified in (E.3.1.1).
2.
Alternatively, non-inspected pipe ends in (E.3.2.1, item 1) may be cut off.
3.
The non-AUT inspected pipe end shall not be longer than 355 mm (14 in).
E.3.2.2
Replace this clause with the following:
1.
For SAW and COW pipe, the weld at each pipe end for a minimum distance of
200 mm (8.0 in) shall be inspected by the radiographic method.
2.
For SAW and COW pipe, the results of radiographic inspection shall be recorded
on either film or another imaging medium (See also E.4).
3.
The radiographic inspected area shall be inspected by the ultrasonic method.
4.
The ultrasonic method shall be considered the prime inspection method.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 46
E.3.2.3
Replace this clause with the following:
1.
Ultrasonic inspection in accordance with the method described in
ISO 10893-8:2011 shall be used to verify that the circumference of the pipe ends
over a length of 25 mm (1 in) or 2t (whichever is the greater, with a maximum of
50 mm (in) from the point where the outside surface meets the face or bevel) is
free from laminar imperfections ≥ 6.4 mm (0.25 in) in the axial and circumferential
directions.
2.
The ultrasonic inspection may be undertaken from the outside surface if the pipe
end is inspected before weld beveling,
3.
If ultrasonic inspection is undertaken after weld beveling inspection shall be from
the pipe internal surface.
Add new clause:
E.3.2.4
E.3.3
SAW & COW pipe end circumference:
1.
Ultrasonic inspection using 45° angle beam shear wave probes and scanning in two
circumferential directions shall be used to verify that the 25 mm (1 in) wide zone at
each pipe end is free of axially aligned through thickness cracking.
2.
An axially aligned N5 notch shall be the reference and acceptance level.
Pipe end inspection — SMLS pipe
E.3.3.1
Replace this clause with the following:
1.
Pipe end – not tested portion: If an automated ultrasonic system (i.e., combined
equipment, operating procedures and personnel) is applied to meet the
requirements of (E.3.1.2), the end of the pipe that is not covered by the
automated inspection system shall be inspected for defects by the semiautomatic ultrasonic angle beam method using the same inspection sensitivity
and inspection parameters as specified in (E.3.1.2).
2.
Pipe ends not inspected by automated or semi-automatic ultrasonic angle beam
methods shall be cut off.
3.
The non AUT inspected pipe end shall not be longer than 324 mm (12 in).
4.
Manual ultrasonic inspection may be approved by the Principal as an interim
measure.
5.
The manufacturer shall install an automatic or semi automatic system within an
agreed time frame if manual ultrasonic inspection is used as an interim measure.
E.3.3.2
Replace this clause with the following:
1.
Ultrasonic inspection in accordance with the method described in
ISO 10893-8:2011 shall be used to verify that the circumference of the pipe ends
over a length of 25 mm (1 in) or 2t (whichever is the greater, with a maximum of
50 mm (2 in), from the point where the outside surface meets the face or bevel) is
free of laminar imperfections ≥ 6.4 mm (0.25 in) in both axial and circumferential
direction.
2.
The ultrasonic inspection shall be carried out from the inside surface if the pipe is
examined after weld bevel cutting.
3.
If ultrasonic inspection is before bevel cutting, the examination may be
undertaken from the outside surface.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 47
E.4
Radiographic inspection of weld seams
E.4.2.3
Replace this clause with the following:
1.
E.4.6
The density of the radiograph shall be between 2.0 – 3.0 in the weld seam.
Defects found by radiographic inspection
Add the following:
1.
Where retesting of suspect areas indicated by UT is performed with RT and found
to be free of indications, the area shall be subjected to further UT.
2.
If an indication is confirmed with the repeat UT and is not caused by geometrical
features or acoustic coupling conditions, then the UT indication shall be classed
as a crack and the material rejected.
Add new clause:
E.4.8
Use of filmless radiography or digital radiography
1.
The radiographic inspection of the body weld seam and the weld seam at the pipe
ends may be replaced by automatic filmless radiography or digital radiography
provided that the standard of the automatic filmless radiography is at least equal to the
requirements for film radiography.
2.
The image quality during digital radiography shall comply to class B (ISO 10893-7).
3.
The final disposition of radiography for suspect areas shall be made using UT
(see E.4.6 and E.5.5.2).
E.5
Ultrasonic and electromagnetic inspection
E.5.1
Equipment
E.5.1.1
Add the following:
1.
Automatic ultrasonic equipment (AUT) SHALL [PS] be used for weld seam and
pipe body inspection for detection of indications and identification of defects.
2.
The AUT shall have automatic facilities with the following characteristics:
a.
Registration/ recording of indications shall be carried out without any
intervention of the ultrasonic operator and available for review.
b.
Any indication above 50% (~ 6 dB) of the reference level shall be marked as
an indication and registered.
c.
There shall be a device that monitors the effectiveness of the acoustic
coupling.
d.
Loss of coupling (a deviation in excess of 10 dB from the good coupling
situation) shall be recorded.
e.
Upon loss of coupling, automatic spray paint shall be activated and
automatic acoustic warnings sounded.
3.
For welded pipe, an automated weld tracking system shall be used for correct
positioning of the probes with respect to the weld centerline.
4.
Manual ultrasonic inspection (MUT) shall be used to verify the indications
rejected by AUT and confirm rejection or acceptance, and to inspect areas not
able to be inspected by AUT.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 48
Add new clause:
E.5.1.3
Performance test of AUT for mill qualification
1.
The performance test shall be carried out during the qualification of the mill to test the
AUT system with the pipes as follows:
a.
For the wall thickness category >11.9 mm (0.469 in) to be qualified:
i.
b.
One test pipe in the highest wall thickness category to be qualified, and
For the wall thickness category <= 11.9 mm (0.469 in) to be qualified:
i.
One test pipe with the lowest wall thickness and diameter to be qualified.
2.
The test pipes shall contain the reference reflectors of Table E.7, E.7.1 (HFW),
E.7.2 (SAW and COW), E.7.3 (SMLS) and either two notches or through-drilled holes
at both pipe ends to mark the border of zones that are not covered by AUT.
3.
The stability tests shall be carried out in dynamic mode.
This means either moving the pipe under a fixed scanning device or moving the
scanning device over the pipe.
4.
The stability tests shall also apply to full body AUT.
5.
The reference signals shall be set on 80% screen height (± 5%) to be able to see
fluctuations in the signal.
6.
The signal to noise ratio of the reference signals shall be at least 12 dB and at least 4x
the noise level.
Figure E.5.1.3 Reference signals
7.
A total of 8 test runs for each test pipe shall be made to confirm the stability of the
AUT system.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 49
8.
9.
E.5.2
The following listed items shall be reported:
a.
Diameter and wall thickness of the test pipe(s);
b.
Specification of used probes (angles and frequencies);
c.
Drawing of the reference reflectors in the test pipe (above view and cross
section);
d.
Layout of the probes in combination with the reading channels;
e.
Printout (paper or digital) of the screen from the individual scans and reference
signals marked on the first scan;
f.
Actual values of the reference signals;
g.
Actual values of the signal to noise ratio.
For the AUT system, the fluctuation of the reference signal between eight test runs
shall be ± 25% of the average signal.
Ultrasonic and electromagnetic inspection reference standards
E.5.2.2
Replace this clause with the following:
1.
Reference standards shall contain as reference indicators one or more notches,
radially drilled holes and, if applicable, flat bottom holes as given in Table E.7,
E.7.1 (HFW), E.7.2 (SAW) and/or E.7.3 (SMLS).
2.
For electromagnetic inspection, the reference standard shall contain OD notches,
ID notches and a radially drilled hole. (See E.5.3.4.)
Replace Table E.7 with the following:
Table E.7 Reference indicators
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 50
Add new table:
Table E.7.1
HFW - Number of Probes for zone of weld for different wall
thickness/reference reflector
1.
A direct irradiation method (pulse echo) may be used if the main axis of the ultrasonic
beam hits the corresponding reference reflector perpendicular within ± 30.
2.
The flat-bottomed holes shall be located at the mid-thickness of the weld inner zone
and be perpendicular to the fusion line of the weld (e.g., at the fusion line 50% or 40
and 60% WT depth).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 51
Add new table:
Table E.7.2a SAW – Number of probes for zone of weld for different wall
thickness/reference reflector
1.
The angle of the probes for embedded zones shall be perpendicular to the original
weld bevel ± 3°.
a.
If the weld bevel is less than 15° (half aperture) the probes shall be used in the
tandem arrangement.
2.
For longitudinal imperfection detection, transducer angle shall be between 50° – 70°.
3.
Notch type reflectors (N5) at the toes of the weld (ID and OD) may be used to verify
start and end of monitoring gates, but not to adjust sensitivity settings.
4.
The echo of notch type reflectors shall exceed the recording threshold level or the
reference sensitivity level adjusted to above 100% FSH.
The reject level remains the original 33% FSH.
5.
Alternative numbers and configurations of probes may be used, subject to
demonstration of reliable responses from the reference indicators for each zone, and
subject to the approval of the Principal.
6.
A 1.6 mm (0.063 in) diameter radially drilled hole with an acceptance level of 0 dB
(100% of reference level) may be used.
7.
There shall not be crack-like indications in any weld beads (weld pass-particularly for
SAW welding).
a.
The gate setting for the weld bevel inspection shall include the weld pass centre
line.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 52
Add new table:
Table 7.2b SAW
Add new figures:
Figure E.1(a) Example of transducer set-up and FBH location at 30% and 70% of wall
thickness for one side of the weld
Figure E1(b) Example of tandem transducer set-up and FBH location at 50% of the
pipe wall thickness for one side of the weld (tandem required if the
(half) bevel angle is less than 15°)
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 53
Add new table:
Table E.7.3
1.
E.5.5
SMLS: probes and reference reflector
Other probe angles may be approved by the Principal, based on the demonstration of
repeatable detection of reference indicators on the calibration pipe.
Acceptance limits
E.5.5.2
Add new clauses:
E.5.7
d.
Where retesting of suspect areas indicated by UT is performed with RT, and
found to be free of indications, the area shall be subjected to further UT.
e.
If the indication is confirmed with the repeat UT and is not caused by geometrical
features or acoustic coupling conditions, the UT indication shall be classed as a
crack and the material rejected.
Weld repair
Add the following:
1.
Repair of HFW pipe weld seams by repair welding is not permitted.
2.
Surface repair of external and internal HFW weld seam shall be done only by
dressing with grinding and wall thickness checked after grinding.
Replace Table E.8 with the following:
Table E.8
Acceptance limit
1.
The reject threshold (see E.5.3) shall not exceed the applicable acceptance limit.
2.
A radially drilled hole of 1.6 mm (0.063 in) with an acceptance limit of 100% (0 dB)
may be used.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 54
E.7
Residual magnetism
E.7.4
Replace this clause with the following:
1.
Measurements shall be made on each end of a pipe, selected at least three times
per 4 h per operating shift.
E.7.6
Replace this clause with the following:
E.8
1.
Four readings shall be taken approximately 90° apart around the circumference
of each end of the pipe.
2.
The average of the four residual magnetism readings shall be ≤ 2.0 mT (20 Gs)
with no individual residual magnetism reading greater than 2.5 mT (25 Gs).
Laminar imperfections in the pipe body of EW, SAW and COW pipes
E.8.1
Replace this clause with the following:
1.
For HFW pipe, ultrasonic inspection shall be used to verify that the pipe body is
free of laminar imperfections.
2.
Ultrasonic inspection of HFW pipe shall be performed in accordance with:
a.
ISO10893-9:2011, if such inspection is done prior to pipe forming; or
b.
ISO 10893-8:2011, if such inspection is done after seam welding.
3.
Acceptance criteria shall be in accordance with Table K.1 of this DEP.
4.
The coverage of the ultrasonic inspection of HFW pipe shall be at least 50% of
the total strip/plate or pipe body.
E.8.2
Replace this clause with the following:
1.
2.
E.9
For SAW and COW pipe, ultrasonic inspection shall be used to verify that the
strip/plate or the pipe body is free of laminar imperfections.
a.
Ultrasonic inspection of SAW and COW pipe shall be in accordance with
ISO 10893-9:2011.
b.
Coverage of the ultrasonic inspection of SAW and COW pipe shall be at
least 50% of the total plate/pipe.
Acceptance criteria shall be in accordance with Table K.1 of this DEP.
Laminar imperfections along the strip/plate edges or pipe weld seam of EW, SAW and
COW pipes
Replace this clause with the following:
1.
For HFW, SAW and COW pipes, ultrasonic inspection shall be used to verify that
the 25 mm (1 in) wide zone along each of the strip/plate edges or along each side
of the pipe weld seam is free of laminar imperfections.
2.
Acceptance criteria for ultrasonic inspection of HFW, SAW, and COW pipes shall
be as follows:
a.
ISO 10893-9:2011 acceptance level U2, if such inspection is done prior to
pipe forming; or
b.
ISO 10893-8:2011 acceptance level U2 if such inspection is done after seam
welding.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 55
Add new clause:
E.11
Laminar imperfections in the pipe body of SMLS pipes
1.
For SMLS pipe, ultrasonic inspection shall be used to verify that the pipe body is free
of laminar imperfections greater than those permitted by ISO 10893-8, acceptance
level U1.
2.
The coverage shall be sufficient to detect the minimum defect size as specified in
ISO 10893-8 level U1 but not less than 50%.
Add new clause:
E.12
Thickness measurements for SMLS pipes
1.
For SMLS pipe, ultrasonic thickness measurements shall be carried out.
2.
Coverage of ultrasonic thickness measurements for SMLS pipe shall be at least 25%
of pipe surface.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 56
Annex F (normative) Requirements for couplings (PSL 1 only)
Delete this annex.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 57
Annex G (normative) PSL 2 pipe with resistance to ductile fracture propagation
G.1
General
Add new clause:
G.1.3
The Charpy test requirements given in (9.8) are based on crack initiation principles.
1.
For rich gas transmission and two phase pipe lines, higher absorbed energy
requirements may be specified to avoid the risk of running fractures.
In this case, the Battelle Two Curve method would be used to determine the
required absorbed energy.
2.
The calculation of the Battelle Two Curve method shall be performed by the Purchaser
and the requirements included in the order form.
DEP 31.40.00.10-Gen., section 8.1.6 provides design information and
requirements.
3.
When specified, additional Charpy impact testing shall be performed on the pipe body
and, for welded pipe, also on the weld and heat affected zone.
a.
The additional Charpy impast testing shall be conducted at the minimum design
temperature provided in the order form and as specified in (9.8).
If the required absorbed energy values are obtained at the test temperature
prescribed for fracture initiation, (9.8.2.1) the additional tests need not be
performed, unless higher values are stated in individual Order forms.
G.6
Guidance for determining CVN absorbed energy values in buried onshore gas pipelines
Replace this clause with the following:
1.
Absorbed energy values shall be as specified in (9.8.2.1) or as stated in
individual order forms.
Delete these clauses:
G.7
EPRG guidelines – Approach 1
G.8
Battelle simplified equation – Approach 2
G.9
Battelle two-curve method – Approach 3
G.10
AISI method – Approach 4
G.11
Full-scale burst testing – Approach 5
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 58
Annex H (normative) PSL 2 pipe ordered for sour service
H.2
Additional information to be supplied by the purchaser
Delete the following items:
Information included in this DEP
b) f) g) h) i) j) k) l) m) n)
Information not applicable to this DEP
c)
H.3
Manufacturing
H.3.1
Manufacturing procedure
Remove the word “possibly.”
H.3.3
Pipe manufacturing
H.3.3.2
Welded pipe
H.3.3.2.4
Replace this clause with the following:
1.
Strip and plate shall be inspected ultrasonically for laminar imperfections or
mechanical damage in accordance with (Annex K), either before or after cutting
the strip or plate.
2.
Alternatively, the completed pipe may be subjected to full-body inspection,
including ultrasonic inspection.
H.3.3.2.5
Delete this clause.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 59
H.4
Acceptance criteria
H.4.1
Chemical composition
H.4.1.1
Replace this clause with the following:
1.
Table H.1 shall apply for all pipe grades and for pipe with t ≤ 35 mm (1.38 in),
with the additional requirement that Boron (B) shall not exceed 0.001%.
2.
The Manufacturer/Supplier’s target product analysis shall be shown in the
Manufacturing Procedure Specification.
3.
A single value target CEiiw or CEpcm, shall be stated.
4.
The range of elements shall be such that the variation in the single value target
CEiiw does not exceed ± 0.03 units or CEpcm does not exceed ± 0.02 units with the
following additional restrictions:
Table H.4.1.1 Pipe grade restrictions
The figures in Table H.4.1.1 represent the total range and not a plus or
minus tolerance.
5.
There shall be no changes in the chemical composition (within the tolerances
listed in Table H.4.1.1) from the approved MPS composition.
6.
No intentionally added elements shall be increased beyond the limits in Table
H.4.1.1 or removed.
7.
The chemical composition recorded for the pipes used in first-day production
testing shall set the datum CE.
8.
Where any of the elements in Table H.4.1.1 are not intentionally added, the
manufacturer may propose maximum values for approval by the Principal.
9.
All elements listed in Table H.1 shall be reported.
H.4.1.2
Replace this clause with the following.
1.
For pipe with t > 35 mm (1.38 in), the chemical composition shall be agreed with
the Principal, with the requirements given in Table H.1 being amended.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 60
H.4.4
Hardness test
Amend this clause as follows:
1.
The maximum hardness of the pipe body shall not exceed 240 HV10 at the inner
surface, centerline and outer surface.
2.
For specific orders the hardness limits may be reduced from that specified above
in (H.4.4, item 1).
First paragraph: Delete (22 HRC)
Second paragraph: Delete (26 HRC)
H.7
INSPECTION
Table H.3 Inspection frequency
Delete references to SAWH in table:
Note that SAWH is not permitted for sour service per previous clauses in this DEP.
Table H.4 Number, orientation and location of test pieces per sample for hardness
tests
Delete reference to strip/plate end weld.
Delete note c.
H.7.3
Test Methods
H.7.3.1
HIC/SWC test
H.7.3.1.1
Replace this clause with the following:
1.
Refer to NACE TM0284 and DEP 30.10.02.16-Gen requirements for HIC/SWC
tests.
H.7.3.1.4
Replace second sentence with the following:
1.
Photographs of any reportable crack shall be provided with the report.
Add the following:
2.
For tests on HFW pipe, sections containing the weld seam shall be
metallographically examined at magnifications of at least 100X for any evidence
of cracking at the weld line in the through-thickness direction and all such
indications reported.
3.
Indications on the weld line shall not have an aggregate length greater than
0.5 mm (0.02 in) through thickness.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 61
H.7.3.2
SSC test
H.7.3.2.1
Replace this clause with the following:
1.
Sulphide stress cracking tests are required for manufacturing procedure
qualification of each pipe thickness.
2.
A four-point bend test piece in accordance with ISO 7539-2 or ASTM G39 shall
be used.
3.
The SSC test duration shall be 720 h.
4.
SSC testing shall be carried out at 90% of the actual yield of the parent material
using the 4 point bend method (internal surface in tension) as described in Table
B1 of ISO 15156-2, with reference to Appendix 2 of EFC 16.
5.
The applied strain of the SSC test shall be verified by the direct application of
strain gauges.
6.
Test solution A of TM0177 (the same as test solution A, EFC 16 Annex A3), shall
be used adjusted to a starting pH of 3.5. 1 bara (pure).
7.
For welded pipe three four-point bent test specimens shall be taken transverse to
the weld.
8.
The distance between the inner supports shall be equal to, or greater than, the
width of the weld plus 50 mm (2 in) (25 mm (1 in) on each side of the weld).
9.
The specimen thickness shall be t or 15 mm (0.6 in), whichever is the less, unless
otherwise agreed with the Principal.
10. The specimen width shall be ≥ 20 mm (0.8 in), unless otherwise agreed with the
Principal.
11. All SSC test specimens shall meet the acceptance criteria of ISO 15156-2.
12. All SCC test specimens shall be evaluated for resistance to SOHIC in accordance
with ISO 15156-2, clause B.4.2.3.
13. Two longitudinal metallographic sections shall be taken from each SSC
specimen.
14. There shall be no ladder-like HIC features or cracks exceeding a length of
0.5 mm (0.02 in) in the through thickness direction.
H.7.3.3
Hardness test
H.7.3.3.1
Replace the first two paragraphs with the following:
1.
Hardness testing shall be performed using the Vickers test in accordance with
ISO 6507-1 or ASTM E384.
Figure H.1 – Location of hardness tests
Amend note b) as follows:
0.50 mm (0.02 in) from fusion line
Modify drawings a, b and c with:
2.
Surface hardness indentation shall be on a line not greater than 1.5 mm (0.06 in)
from the inside and outside surfaces.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 62
Add new clause:
H.7.3.4
Root guided bend test for HFW pipe
H.7.3.4.1
1.
Root guided-bend test specimens shall be undertaken in accordance with 10.2.4.6 on
pipe of 219 mm (8 in) OD and greater.
1.
One root guided-bend test shall be conducted for each pipe on MPS qualification (first
day production test) at both ends of each pipe, and in production on one end per pipe
per 100 pipes.
1.
Root guided bend test specimens shall not fracture completely.
2.
No opening longer than 3 mm (1/8 in) shall occur during the root guided bend test.
H.7.3.4.2
H.7.3.4.3
Add new section:
H.9
PSL 2 pipe ordered for sour service – Additional requirements to comply with Canadian
Standard CSA Z662
H.9.1
Scope
This section, which continues through the remainder of Annex H, contains additional
requirements for sour service pipe when the requirements of Canadian Standards
CSA Z245.1 and CSA Z662 for line pipe are specified in the order form.
Modifications to (PART III AMENDMENTS/SUPPLEMENTS TO ISO 3183:2012) 3 Normative
references
Add:
CSA Z662, Oil and Gas Pipeline Systems;
CSA Z245.1 Steel Pipe;
ERCB directive 56;
Alberta Pipeline Act and Regulations;
British Columbia Oil and Gas Activities Act;
B.C. Reg. 281/2010 Pipeline and Liquefied Natural Gas Facilities Regulation;
Shell STD. 3-1.12, Pipe, Valves and Fittings - Piping Classes, (Upstream Field
Facilities).
9.9
DWT test for PSL2 welded pipe
9.9.1
Replace this clause with the following:
1.
Refer to CSA Z245.1 Clause 8.4.4.1.3 for the requirements of DWT test for PSL2
welded pipe.
2.
Drop-weight tear tests or Charpy V-notch impact tests shall be performed at the
minimum design temperature specified in the order form.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 63
H.4.2
Tensile properties
Replace this clause with CSA Z245.1 Clause 16.8.
H.4.4
Hardness test
Delete second paragraph:
Add, based on CSA Z245.1 Clause 16.5:
1.
The microhardness at any location in the weld zone of HFW pipe and in the
deposited weld metal and heat-affected zones of other welds shall not
exceed 248 HV 500 gf.
2.
The welding procedure qualification test for the pipe weld shall be
microhardness tested at the hardest-appearing microstructure.
a.
The microhardness at any location therein shall not exceed
248 HV 500 gf.
Add new clause
H.4.6
Root-Guided Bend Test
1.
H.5
Refer to CSA Z245.1 Clause 16.6 for requirements for root-guided bend test.
Surface conditions, imperfections and defects
Delete this clause.
H.7
Inspection
H.7.1
Specific inspection
Replace Table H.3 with the following:
Table H.3 Inspection frequency
Replace line 5 with:
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 64
H.7.3
Test Methods
H.7.3.3
Hardness test
Add new clause, based on CSA Z245.1 clause 16.5:
H.7.3.3.4
Microhardness
1.
The welding procedure qualification test weld for longitudinal seam of SAW and COW
pipe shall be microhardness tested at the hardest-appearing microstructure.
2.
The microhardness at any location therein shall not exceed 248 HV 500 gf.
3.
The microhardness at any location in the weld zone of electric welded pipe and in the
deposited weld metal and heat-affected zones of other welds shall not exceed
248 HV 500 gf.
Add new clause, based on CSA Z245.1 Clause 16.6 and 7.5.2:
H.7.3.4
Root guided bend test for HFW pipe
1.
Root guided-bend test specimens shall be in accordance with Clause 10.2.4.6.
2.
For electric welded pipe produced in single lengths, when specified, one root
guided-bend test shall be conducted at each end of electric-welded pipe.
3.
For electric-welded pipe produced from coiled skelp in multiple lengths and
subsequently cut into single lengths, two test rings for each multiple length from the
leading end of the first pipe and two test rings from the trailing end of the last pipe,
shall be tested with the weld altemately at 0° and 90° to the applied force.
4.
The 0° tests are not required for pipe subjected to root guided-bend testing in
accordance with the requirements of 10.2.3.6.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 65
Annex I (normative) Pipe ordered as “Through the Flowline" (TFL) pipe
Delete this annex.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 66
Annex J (normative) PSL 2 pipe ordered for offshore service
J.2
Additional information to be supplied by the purchaser
Delete the following items:
Information included in this DEP
b), e), g), m), n), p)
Information not applicable to this DEP
c)
Add:
dd) more stringent tolerances on pipe end out-of-roundness and internal diameter.
ee) recording pipe end out of roundness and internal diameter for each pipe end.
J.3
Manufacturing
J.3.3
Pipe manufacturing
J.3.3.2
Welded pipe
J.3.3.2.4
Replace this clause with the following:
1.
Strip or plate shall be inspected ultrasonically for laminar imperfections or
mechanical damage in accordance with Annex K.
a.
The ultrasonic testing shall be done:
i.
before or after cutting the strip or plate; or
ii.
as part of full-body inspection completed on the formed pipe.
J.3.3.2.5
Delete this clause.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 67
J.4.1
Chemical Composition
J.4.1.1
Replace the first sentence with the following:
1.
Table J.1 (non sour service) shall apply for all pipe grades and for pipe with
t ≤ 35 mm (1.38 in).
2.
The Manufacturer/Supplier’s target product analysis shall be shown in the
Manufacturing Procedure Specification.
3.
A single value target of CEiiw or CEpcm shall be stated.
4.
The range of elements shall be such that the variation in the single value target
CEiiw does not exceed ± 0.03 units or CEpcm does not exceed ± 0.02 units with the
following additional restrictions:
Table J.4
Elements Tolerances
The figures in Table J.4 represent the total range and not a plus or
minus tolerance.
5.
There shall be no changes in the chemical composition (within the tolerances
listed in Table J.4) from the approved WPS composition.
6.
No intentionally added elements shall be removed or increased beyond the limits
in Table J.4.
7.
The chemical composition recorded for the pipes used in first-day production
testing shall set the datum CE.
8.
All elements listed in Table H.1 shall be reported.
J.4.1.2
Replace this clause with the following.
1.
For pipe with t > 35 mm (1.38 in) the chemical composition shall be subject to
approval of the Principal, with the requirements given in Table J.1 being
amended as applicable.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 68
J.6
Tolerances for diameter, wall thickness, length and straightness
Table J.3 – Tolerances for diameter and out-of-roundnessModify Table J.3 as follows:
1.
The pipe end out-of-roundness for pipe > 610 mm (24 in) diameter and with D/t < 75
shall be 0.0075D with a maximum of 6 mm (0.25 in).
Where required by the order form, tighter tolerances on pipe end out-of-roundness
and internal diameter might apply.
Replace Note c) with the following:
1.
For pipe with D ≥ 219.1 mm (8.63 in), the diameter tolerance and out of
roundness shall be determined using the measured inside diameter.
2.
The OD OOR requirements shall be maintained.
3.
Pipe end rectification may be applied to achieve diameter and OOR tolerance,
subject to review and approval of the rectification procedure by the Principal.
Add new clause:
J.6.5
Surface condition of pipe ends
1.
The outer surface of the pipe, for a distance of 200 mm (8 in) from each pipe end,
shall permit the use of AUT examination of circumferential joints during pipeline
installation.
2.
There shall be no pitting in the outer surface of the pipe, for a distance of 200 mm
(8 in) from each pipe end greater than 0.25 mm (0.001 in) in depth.
3.
The surface finish of the pipe measured during the MPQ shall be the agreed surface
finish for all production pipes.
J.7
Tolerances for the weld seam
J.7.1
Radial offset of strip/plate edges
Delete clause and replace with the following:
1.
The radial offset of strip/plate edges shall be in accordance with (9.13.1).
J.8
Inspection
J.8.1
Specific inspection
Table J.6 – Inspection frequency
Add note:
1.
Higher frequencies of inspection for pipe end internal diameter and out-of
roundness may be specified in the order form.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 69
J.8.2
Samples and test pieces for mechanical and technological tests
J.8.2.2
Test pieces for CTOD test
Replace this clause and with the following.
1.
Test pieces shall be taken in accordance with (10.2.3.8).
Table J.7 – Number, orientation and location of test pieces per sample for
mechanical tests
Modify this table as follows:
1.
For pipe of D ≥ 219.1 mm (8.63 in), longitudinal and transverse pipe body
tensile tests are required at the frequency of testing given for transverse
pipe body tests (as modified by J8.1).
2.
The acceptance criteria for longitudinal pipe body tensile tests shall be as for
the transverse tests.
J.8.3
Test methods
J.8.3.1
CTOD test
Replace this clause with the following:
J.8.3.2
1.
CTOD testing shall be performed in accordance with ISO 12135.
2.
The CTOD test temperature shall be the minimum design temperature as stated
in the order form.
3.
The minimum CTOD value (from a set of three specimens) taken from each of
the pipe, weld and HAZ locations, shall be 0.25 mm (0.0098 in), tested at the
minimum design temperature given in the order form.
Hardness test
J.8.3.2.1
Replace the first two paragraphs with the following:
1.
Hardness testing shall be performed using the Vickers test in accordance with
ISO 6507-1 or ASTM E384,
Figure J1
Location of hardness tests
Amend note b) as follows:
0.50 mm (0.02 in) from fusion line
Modify drawings a, b and c with:
2.
Surface hardness indentation shall be on a line not greater than 1.5 mm
(0.06 in) from the inside and outside surfaces.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 70
Annex K (normative) Non-destructive inspection for pipe ordered for sour and/or offshore
service
K.2
General non-destructive inspection requirements and acceptance criteria
K.2.1
Laminar imperfections at the pipe ends
K.2.1.2
Delete this clause.
K.2.1.3
Remove words “If agreed”
Add the following:
1.
This may be undertaken from the outside surface if the pipe end is inspected
before weld beveling.
2.
If inspection is after weld beveling, this shall be undertaken from the pipe
internal surface.
K.2.1.4
Add the following:
1.
K.2.2
When specified in the order form, the end face/bevel at each pipe end shall be
magnetic particle inspected for the detection of laminar imperfections.
Suspect pipe
K.2.2.4
Replace this clause with the following:
1.
Where dressing is carried out, complete removal of defects and the remaining
wall thickness shall be verified by local visual inspection and by aNDT method.
K.3
Non-destructive inspection of SMLS pipe
K.3.1
Ultrasonic inspection for longitudinal imperfections
Replace this clause and with the following:
1.
All SMLS pipe shall be non-destructively inspected full length (100%) per
ISO 10893-10 (longitudinal and transverse imperfections), as given in Table E.2.
2.
Acceptance limits shall be as per Table E.8 of this DEP.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 71
K.3.2
Laminar imperfections in the pipe body
K.3.2.1
Replace this clause with the following:
1.
For sour service, individual laminations and/or lamination densities exceeding the
acceptance limits for sour service given in Table K.1 shall be classified as
defects.
2.
Compliance with (K.3.2.1, item 1) shall be verified by ultrasonic inspection in
accordance with ISO 10893-8:2011 (except 5.2).
3.
The coverage during automatic inspection shall be 100% of the pipe surface.
K.3.2.2
Replace this clause with the following:
K.3.4
1.
For offshore service, individual laminations and/or lamination densities exceeding
the acceptance limits for offshore service given in Table K.1 shall be classified as
defects.
2.
Compliance with (K.3.2.2, item 1) shall be verified by ultrasonic inspection in
accordance with ISO 10893-8 2011 (except 5.2).
3.
The coverage during automatic inspection shall be ≥ 50% of the pipe surface.
Supplementary non-destructive inspection
Table K.1 Acceptance criteria for laminar imperfections
1.
In Table K.1 under Service Condition column “Sour, if agreed” delete “if agreed”
(i.e., this applies for all sour service pipe).
K.4
Non-destructive inspection of HFW pipe
K.4.1
Non-destructive inspection of the weld seam
Replace this clause with the following:
K.4.2
1.
The full length of the weld seam shall be ultrasonically inspected for the detection
of longitudinal imperfections, with the acceptance limits being in accordance with
Table E.8 of this DEP.
2.
The probe per weld distribution shall be in accordance with Table E.7.1 of this
DEP.
Laminar imperfections in the pipe body
Replace this clause with the following:
K.4.2.1
General
1.
K.4.2.2
For sour surface applications
1.
K.4.2.3
The pipe or strip/plate body shall be ultrasonically inspected for the detection of
laminar imperfections in accordance with ISO 10893-8:2011 (except 5.2) or
ISO 10893-9:2011 (except 5.2), respectively, to acceptance limits for the relevant
application as given in Table K.1.
For strip/plate and pipe examination, the coverage during automatic inspection shall
be 100% of the pipe surface.
For offshore, non sour, applications
1.
The level of coverage shall be ≥ 50% of the pipe or plate/strip surface.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 72
K.4.3
Laminar imperfections on the strip/plate edges or areas adjacent to the weld seam
Replace this clause with the following:
K.4.4
1.
The strip/plate edges or the areas adjacent to the weld seam shall be
ultrasonically inspected over a width of 25 mm (1 in) for the detection of laminar
imperfections, in accordance with ISO 10893-8:2011 or ISO 10893-9.
2.
The acceptance limits of the ultrasonic inspection shall be as given in Table K.1.
Supplementary non-destructive inspection
Delete this clause.
K.5
Non-destructive inspection of SAW pipe
K.5.1
Ultrasonic inspection for longitudinal and transverse imperfections in seam welds
K.5.1.1
Replace this clause with the following:
1.
2.
The full length of the weld seams of SAW pipe shall be ultrasonically inspected
for the detection of longitudinal and transverse imperfections in accordance with
ISO 10893-11:2011 acceptance level U2, with the following modifications:
a.
The notch depth shall be ≤ 2.0 mm (0.080 in).
b.
Internal and external longitudinal notches located on the centre of the weld
seam shall not be used for equipment standardization purposes.
c.
The sensitivity of the longitudinal imperfection detection probes shall be
adjusted on the radially drilled hole, as per Table E.7.2.
d.
As an alternative to the use of the reference hole for equipment calibration
for the detection of transverse imperfections, acceptance level U2 internal
and external notches lying at right angles to, and centered over, the weld
seam may be used.
e.
In the case of (K.5.1.1 item 1d), the Manufacturer may grind both the internal
and external weld reinforcements to match the pipe contour in the immediate
area and on both sides of the reference notches.
f.
The refernce notches shall be sufficiently separated from each other in the
longitudinal direction and (if ground flush) from any remaining reinforcement,
to give clearly identifiable separate ultrasonic signal responses.
g.
The full signal amplitude from each notch shall be used to set the
trigger/alarm level of the equipment.
h.
The manufacturer may apply the provisions of (K.5.3) to retest the suspect
areas.
The probe per weld zone distribution shall be in line with Table E.7.2 of this DEP.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 73
K.5.1.2
Delete this clause.
K.5.1.3
Delete this clause.
K.5.2
Laminar imperfections in the pipe body and on the strip/plate edges
K.5.2.1
Replace this clause with the following:
K.5.2.1.1
General
1.
K.5.2.1.2
The pipe or strip/plate body shall be ultrasonically inspected for the detection of
laminar imperfections in accordance with ISO10983-9:2011 (except 5.2) to acceptance
limits given in Table K.1 with the following coverage requirements:
For sour surface applications:
1.
K.5.2.1.3
For strip/plate and pipe examination, the coverage during automatic inspection shall
be 100% of the pipe surface.
For offshore, non-sour applications:
1.
The required levels of coverage for plate/strip and pipe shall be ≥ 50% of the pipe
surface.
K.5.2.2
Replace this clause with the following:
K.5.3
1.
The strip/plate edges or the areas adjacent to the weld seam shall be
ultrasonically inspected over a width of 25 mm (1 in) for the detection of laminar
imperfections, in accordance with ISO 10893-8:2011 or ISO 10893-9:2011.
2.
The acceptance limits of ultrasonic inspection shall be as given in Table K.1.
Non-destructive inspection of the weld seam at the pipe ends/repaired areas
Replace this clause with the following:
1.
2.
The length of weld seam at pipe ends that cannot be inspected by the automatic
ultrasonic equipment and repaired areas of the weld seam (see Clause C.4) shall
be subjected to the following:
a.
For the detection of longitudinal imperfections, semi-automatic or manual
ultrasonic inspection using the same inspection sensitivity and inspection
parameters as is specified in (K.5.1.1) and radiographic inspection in
accordance with Clause E.4.
b.
Manual ultrasonic inspection may be approved by the Principal as an interim
measure if the manufacturer installs an automatic or semi automatic system
within an agreed time frame.
c.
For the detection of transverse imperfections, automatic or semi-automatic
ultrasonic inspection using the same inspection sensitivity and parameters
as is specified in (K.5.1.1) and radiographic inspection in accordance with
(E.4).
For manual ultrasonic inspection, the maximum scanning speed shall be
150 mm/s (6 in/s).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 74
K.5.4
Supplementary non-destructive inspection operation
Add the following:
1.
Each pipe shall be tested over the final 25 mm (1 in) at each end with UT using a
45° shear wave probe to disclose axially aligned, through-thickness cracks.
2.
The manufacturer may perform the examination in (K.5.4, item 1) on the ends of
the plate ends prior to forming/welding.
3.
There shall be no cracks
a.
Any cracked areas shall be cut-off and the pipe end re-tested.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 75
Annex M (normative) Pipe ordered for European onshore natural gas transmission lines
Delete this annex.
This Appendix is not applicable for Shell pipelines in Europe unless specified in
individual order forms.
th
This Appendix is blank in API SPEC 5L 45 Edition.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 76
PART IV REFERENCES
In this DEP, reference is made to the following publications:
NOTES:
1. Unless specifically designated by date, the latest edition of each publication shall be used,
together with any amendments/supplements/revisions thereto.
2. The DEPs and most referenced external standards are available to Shell staff on the SWW (Shell
Wide Web) at http://sww.shell.com/standards/.
SHELL STANDARDS
DEP feedback form
DEP 00.00.05.80-Gen.
Definition of temperature, pressure, and toxicity levels
DEP 01.00.01.30-Gen
Evaluation of pipeline and pressure vessel steels for resistance to
hydrogen-induced cracking (amendments/supplements to
NACE TM0284)
DEP 30.10.02.16-Gen.
Pipeline engineering (amendments/supplements to ISO 13623)
DEP 31.40.00.10-Gen.
Line pipe induction bends (amendments/supplements to ISO 15590-1)
DEP 31.40.20.33-Gen.
Welding of deepwater pipelines, flowlines, and steel catenary risers
(amendments and supplements to API 1104)
DEP 37.81.40.31-Gen.
Welding of pipelines and related facilities (amendments/supplements
ISO 13847:2000)
DEP 61.40.20.30-Gen.
Project quality assurance
DEP 82.00.10.10-Gen.
Shell HSSE & SP Control Framework, Design Engineering Manual
(DEM) 1 – Application of Technical Standards
https://eu001sp.shell.com/sites/AAAAA8432/CF/Web/Design Engineering Manual
1 DEM1.aspx
DEM 1
Pipe, Valves and Fittings - Piping Classes, (Upstream Field Facilities)
Shell STD. 3-1.12
AMERICAN STANDARDS
Standard test methods and definitions for mechanical testing of steel
products
ASTM A370
Standard test method for knoop and vickers hardness of materials
ASTM E384
Standard test method for crack-tip opening displacement (CTOD)
fracture toughness measurement
ASTM E1290
Standard practice for preparation and use of bent-beam stresscorrosion test specimens
ASTM G39
Recommended practice for care and use of cable drilling and fishing
tools
API RP3
th
Specification for Line Pipe – 45 Edition; Effective Date: July 1, 2013
API SPEC 5L
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 77
CANADIAN STANDARDS
Steel Pipe - Eighth Edition
CSA Z245.1-07
Oil and gas pipeline systems - Sixth Edition
CSA Z662-11
ERCB directive 56
Alberta Pipeline Act and Regulations
British Columbia Oil and Gas Activities Act
B.C. Reg. 281/2010 Pipeline and Liquefied Natural Gas Facilities
Regulation
EUROPEAN STANDARDS
Guidelines on materials requirements for carbon and low alloy steels
for H2S-containing environments in oil and gas productionIssued by:
European Federation of Corrosion
EFC 16
INTERNATIONAL STANDARDS
Petroleum and natural gas industries — Steel pipe for pipeline
transportation systems
ISO 3183
Metallic materials Vickers hardness test Part 1: Test method
ISO 6507-1
Metallic materials – Tensile testing at ambient temperature
ISO 6892
Corrosion of metals and alloys - Stress corrosion testing –
Part 2: Preparation and use of bent-beam specimens
ISO 7539-2
Specification and approval of welding procedures for metallic materials
– Part 3: Welding procedure tests for the arc welding of steels
ISO 9956-3
Quality management systems — Requirements
ISO 9001
Quality management systems – Guidelines for quality plans
ISO 10005
Non-destructive testing of steel tubes - Part 7: Digital radiographic
testing of the weld seam of welded steel tubes for the detection of
imperfections
ISO 10893-7
Non-destructive testing of steel tubes - Part 8: Automated ultrasonic
testing of seamless and welded steel tubes for the detection of laminar
imperfections
ISO 10893-8
Non-destructive testing of steel tubes - Part 9: Automated ultrasonic
testing for the detection of laminar imperfections in strip/plate used for
the manufacture of welded steel tubes
ISO 10893-9
Non-destructive testing of steel tubes - Part 10: Automated full
peripheral ultrasonic testing of seamless and welded (except
submerged arc welded) steel tubes for the detection of longitudinal
and/or transverse imperfections
ISO 10893-10
Non-destructive testing of steel tubes - Part 11: Automated ultrasonic
testing of the weld seam of welded steel tubes for the detection of
longitudinal and/or transverse imperfections
ISO 10893-11
Metallic materials Unified method of test for the determination of
quasistatic fracture toughness
ISO 12135
Petroleum and natural gas industries – Pipeline transpiration systems
ISO13623
Petroleum and natural gas industries — Materials for use in H2Scontaining environments in oil and gas production — Part 2: Cracking-
ISO 15156-2
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 78
resistant carbon and low-alloy steels, and the use of cast irons
Metallic materials — Method of test for the determination of quasistatic
fracture toughness of welds
BSI BS EN ISO 15653
Petroleum and natural gas industries – Induction bends, fittings and
flanges for pipeline transportation systems – Part 1, Induction bends
ISO 15590-1
NORWEGIAN STANDARDS
Offshore standard, Submarine pipeline systems
DNV OS-F101
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 79
APPENDIX 1
1.1
LINE PIPE SUBJECTED TO HIGH STRAIN
GENERAL
The following requirements are additional to those specified for PSL2 pipe ordered for
th
offshore service by ISO 3183:2012 and API SPEC 5L 45 Edition (Annex J) and this
DEP.
The requirements in this Appendix apply for pipe or pipelines for use in the following
applications:
•
Deepwater applications
•
Reeled installations
•
Pipe for pipelines subject to a single high strain event, where (elastic + plastic) in
any direction is > 1.0% or accumulated strain is > 2%, during installation or
operation.
These conditions apply to all pipelines subjected to high strain, whether onshore or
offshore, at pipe grades up to and including L450.
1.
For pipe proposed for installation by reeling, reelability data shall be provided for the
pipe proposed and include previous data for pipe in terms of the same pipe grade,
dimensions, manufacturing process, chemical composition, and heat treatment.
2.
The reelability data shall be provided before and after reeling trials/simulations
including but not limited to stress/strain curves, fatigue, toughness, hardness, yield,
tensile, and yield/tensile ratios.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 80
1.2
MECHANICAL PROPERTIES
1.
The results of all longitudinal tensile tests shall conform to the requirements of
Table J.2 with the following modifications:
a.
Non proportional tensile specimens with 50 mm (2 in) gauge length should be
used.
b.
Where specified in order forms, the proportional type shall be used in accordance
with ISO 6892.
i.
2.
3.
c.
The yield strength shall not exceed the specified minimum value by more than
120 MPa (17,405 psi) or vary more than 100 MPa (14,505 psi) from the agreed
MPS value;
d.
The ratio of yield to tensile strength shall not exceed 90%;
e.
The elongation shall not be less than 20%.
One set of longitudinal Charpy impact specimens shall be taken at a frequency of one
set per test unit from the pipe body.
a.
The Charpy impact specimens shall be through-thickness notched and located at
mid-thickness.
b.
The minimum Charpy impact energy shall be 100 J (75 ft-Ibf) average and 80 J
(60 ft-Ibf) individual.
c.
The testing temperature shall be as given in Table 8, unless otherwise specified
on the order form.
For the manufacturing procedure qualification test, the longitudinal tensile and Charpy
impact tests shall be carried out in both the as-received condition and after a heat
treatment simulating thin-film coating.
a.
4.
For proportional type, the gauge length shall be equal to 5.65S0, where S0
is the original cross-sectional area of the specimen;
The heat treatment shall consist of holding at 250 °C (480 °F) for a minimum of
10 minutes, unless otherwise specified on the order form.
When required by the the Principal, all production longitudinal tensile and Charpy
impact test shall receive the same heat treatment prior to testing.
This decision by the Principal is dependent on the results of the manufacturing
qualification test.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 81
1.3
STRAIN AGED TESTING
1.
The following shall form part of the manufacturing procedure qualification test for each
combination of diameter and wall thickness.
a.
For reeling applications, two samples of pipe shall be subject to a longitudinal
plastic strain of 3% per the following cycles:
i.
Sample 1:
Start in tension strain – Finish in compression strain 3 times.
ii.
Sample 2:
Start in compression strain - Finish in tension strain 3 times.
b.
For single high strain events (see (Appendix 1, Section 1.1)), samples of pipe
body shall be subjected to a longitudinal, uni-axial strain of 3.0% (or greater if
stated in the order form).
c.
A sufficient number of strain gauges shall be used to verify even straining.
Refer to DNV F101 – Appendix B: A1200.
2.
d.
Samples of the longitudinal seam weld (SAW and HFW pipe) shall besubjected to
uni-axial straining to 3.0% strain (unless otherwise stated in the order form)
transverse to the seam.
e.
After straining, the samples shall be aged at 250 °C (480 °F) for one hour.
The following mechanical tests shall be performed:
a.
b.
Pipe body:
i.
Two longitudinal tensile tests;
ii.
One set of three longitudinal Charpy impact tests ;
iii.
One through thickness hardness survey (HV10), per Fig J.1.a).
Weld seam:
i.
One all-weld tensile test (SAW only);
ii.
Four sets of Charpy impact tests at weld, fusion line, fusion line+2 mm
(0.08 in) and fusion line +5 mm (0.2 in) in accordance with 10.2.3.3;
iii.
One hardness survey (HV10) per Fig J.1 b) or c).
3.
The impact test temperature shall be as specified for the unstrained tests.
4.
The acceptance criteria for all mechanical tests shall be as specified for the unstrained
tests.
a.
Yield/tensile ratio may be increased by up to 4% points (or higher if approved by
the Principal).
5.
Where required by the Order Form, SSC testing shall be performed on samples after
undergoing straining and aging.
6.
HFW pipe intended for reeling shall be subjected to one of the following heat
treatments:
a.
Full body quench and temper; or
b.
Weld seam online quench followed by full body temper.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 82
APPENDIX 2
2.1
WELDABILITY OF PSL2 PIPE
GENERAL
1.
Weldability trials on the pipe material shall be carried out for all offshore pipelines, all
pipelines greater than 0.5% strain, and where otherwise specified in the Order form.
The intent of the weldability tests is to verify adequate properties in the girth weld
HAZ.
a.
Weldability tests shall be performed by the pipe manufacturer.
b.
Weldability tests may be performed by the installation contractor if agreed by the
Principal.
Weldability performed by the installation contractor runs the risk of material being
received that is not suitable for the project.
2.2
2.
The pipe material shall be as qualified in the manufacturing procedure qualification
(Annex B) and within the limits specified in (B.5), as modified by this DEP.
3.
One trial each shall be carried out at the minimum and maximum heat inputs as
detailed below at the minimum and maximum wall thicknesses to be produced, or as
agreed with the Principal.
4.
Data from previous weldability trials may be accepted by the Principal, in whole or
part, in lieu of testing.
5.
Where the Principal allows data from previous wedability trials in leu of testing,
material used in the previous weldability trials shall be identical in grade and
manufacturing procedure to the pipe to be supplied and be of similar diameter, wall
thickness and chemical composition (within the limits of Annex H table H.1).
WELDING
1.
Girth welds shall be carried out in accordance with welding procedure specifications
representative of those used by installation contractors and subject to approval by the
Principal.
However, the pipe is normally roll welded (1G) so as to ensure a consistent and
even heat input.
2.
A Welding Procedure Specification (WPS) prior to welding and a Procedure
Qualification Record (PQR) after welding and testing shall be provided.
Guidance on welding procedure and testing requirements is given in
DEP 61.40.20.30-Gen. and DEP 37.81.40.31-Gen.
For requirements around the production of girth welds, refer to
DEP 61.40.20.30-Gen. and DEP 37.81.40.31-Gen.
3.
Welds shall be produced by the mechanized/automatic GMAW process or SAW
process with arc energies for each weld pass of 0.5 kJ/mm and 2.0 kJ/mm (unless
otherwise stated on the order form) so as to cover the lower and upper heat input
ranges of typical weld procedures.
a.
The upper and lower heat inouts should be consistent throughout the weld (i.e.,
each weld pass should have the same heat input).
4.
Welding techniques shall be utilized that results in a straight HAZ on a square edge
side of the weld grove (i.e., a bevel with one side square, the other side bevelled).
5.
The HAZ shall be considerd sufficiently straight when scribed marks for the machining
of fracture toughness specimen notches sample at least 80% of the scribe length in
the central 60% of the specimen thickness within 0.5 mm of the fusion line.
The 80% need not be continuous.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 83
2.3
6.
For the purpose of the criteria in (2.2, item 5), the fusion line shall be considered part
of the weld metal and not be included in the determination of % HAZ sampled.
7.
Weld bead placement techniques shall be utilized such that within the central 60% of
the section thickness, 25% of the weld metal adjacent to the fusion line on the square
edge side of the weld grove is unrefined-columnar weld metal.
8.
At least one full butt weld shall be produced for each trial.
9.
When additional welds are required to be supplied for testing conducted by the
Principal, the number and dimensions of these weld test pieces shall be stated in the
purchase order.
MECHANICAL AND CORROSION TESTING
1.
Mechanical testing of the weld and heat affected zone (HAZ) shall be as follows:
a.
Cross Weld Tensile.
i.
b.
c.
d.
Fracture shall be in the base material.
Cross macro and weld hardness survey.
i.
The survey shall be performed 1.5 mm (+0 -0.5) below the OD and ID
surfaces and mid wall with indentations spaced at 0.5 mm (0.02 in) into the
base unaffected material.
ii.
The initial indentation shall be within one diamond indentation of the fusion
line on the straight edge.
iii.
The maximum shall be 275 HV10 except where sour service is applied.
iv.
Where sour service is applied, the maximum shall be 250 HV10.
Charpy and Charpy transition in both the HAZ within 0.5 mm (0.02 in) of the
fusion line and at the edge of the visible HAZ.
i.
Charpy acceptance criteria shall be as per the base material and (unless
otherwise stated in the order form) Charpy test temperature shall be - 20 °C
(- 4 °F).
ii.
There shall be a transition curve for each of the test areas.
CTOD in both the HAZ within 0.5 mm (0.02 in) of the fusion line and at the edge
of the visible HAZ.
i.
CTOD shall be performed.
ii.
Sectioning of CTOD samples should be made following testing to ensure
sampling of the required areas.
iii.
Pre and post macro-graphs should be supplied to show sampling
requirements have been met.
iv.
CTOD acceptance criteria shall be as per the base material and (unless
otherwise stated in the order form) CTOD test temperature shall be - 10 °C
(14 °F).
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 84
2.
Fracture toughness testing shall be carried out for the weld, fusion line and HAZ for
each weld heat input as follows:
a.
b.
For elastic design:
i.
SENB CTOD specimens shall be used.
ii.
For weld metal specimens, the fatigue crack tip shall sample 100% of the
weld metal and be within 1 mm - 2 mm from the fusion line.
iii.
For HAZ specimens, the fatigue crack tip shall sample at least 50% of the
fusion line.
iv.
A minimum CTOD value of 0.25 mm (0.01 in) shall be achieved in all tests.
v.
For SCR pipe, the minimum allowable CTOD shall be 0.51 mm (0.02 in).
For high strain:
i.
Testing for high strain design shall be performed following application of
straining and ageing per (Appendix 1).
1). CTOD testing may be either single specimen or multiple specimen, as
indicated on the order form.
2). For multiple specimen CTOD testing, at least 6 CTOD specimens
(SENB or SENT or both, as stated in the Order form) shall be tested,
and an R-curve for the HAZ produced.
3). The design temperature relevant to CTOD and impact testing shall be
as stated in the order form.
ii.
Where required by the order form, corrosion (SSC) testing shall be carried
out in accordance with section 6.8 of DEP 61.40.20.30-Gen.
1). The specimen thickness shall be t or 15 mm (0.6 in), whichever is less.
2). Specimens not exhibiting surface cracking after testing shall be
evaluated for resistance to SOHIC in accordance with ISO 15156-2,
clause B.4.2.3:
A). Two longitudinal metallographic sections shall be taken from each
SSC specimen.
3). There shall be no ladder-like HIC features or cracks exceeding a length
of 0.5 mm (0.02 in) in the through thickness direction.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 85
APPENDIX 3
3.1
LINE PIPE FOR DEEPWATER PROJECTS, INCLUDING STEEL CATENARY
RISERS
SCOPE
This appendix, when stated on the order form or project documentation, specifies the
requirements for line pipe used on deepwater projects. These requirements are in
th
addition to those specified in this DEP, ISO 3183:2012 and API SPEC 5L 45 Edition.
3.2
1.
The requirements of Annex J and Appendices 1 and 2 shall apply to all pipes for
deepwater projects unless specifically stated otherwise on order forms for specific
projects.
2.
When specified in the order form or project documentation for sour service the
requirements of (Annex H), as modified by this DEP, shall also apply.
GENERAL
1.
The results of all longitudinal tensile tests shall conform to the requirements of
Table J.2 with the following modifications:
a.
Non proportional tensile specimens with 50 mm (2 in) gauge length should be
used.
b.
Where specified in order forms, the proportional type tensile specimens shall be
in accordance with ISO 6892.
c.
For proportional type tensile specimens the gauge length shall be equal to
5.65S0, where S0 is the original cross-sectional area of the specimen;
d.
The yield strength shall not exceed the specified minimum value by more than
120 MPa (17,405 psi) or vary more than 100 MPa (14,505 psi) from the agreed
MPS value;
e.
For seamless pipe, all billets and slabs shall be scarfed or peeled prior to rolling
or forming unless otherwise approved by the Principal after review and evidence
of the billet or slab surface quality.
f.
Continuous cast rounds shall be conditioned to the Manufacturer’s specifications.
g.
Pipe straightness and length shall be measured and recorded for each pipe.
h.
Unless otherwise stated by the Principal, 85% of pipe shall be in the range
11.9 m – 12.5 m (39 ft – 41 ft) with the remaining 15% in the range of
11.6 m –12.8 m (38 ft – 42 ft).
i.
The wall thickness negative tolerance shall be -5%.
j.
The wall thickness positive tolerance for seamless pipe shall be +15%.
k.
For welded pipe the tolerance shall be -5% - +10 %.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 86
3.3
3.4
ADDITIONAL TESTING FOR SAW PIPE
1.
During first day production, Manufacturer shall perform circumferential compressive
stress tests.
2.
A compressive stress-strain curve shall be developed.
3.
The units used on each axis of each compressive stress-strain curve shall be clearly
identified.
4.
The compressive stress-strain curves shall cover a range of at least -2.0% strain.
5.
During first day production, Manufacturer shall perform ring splitting residual stress
tests.
6.
If residual stresses are greater than 25% of SMYS, the Principal shall be informed in
order to have the pipe collapse tested.
WELDABILITY TEST
1.
Weldability testing shall be in accordance with (Appendix 2).
2.
CTOD requirements are as follows:
3.
3.5
a.
For SCR pipe: Minimum allowable CTOD shall be 0.51 mm (0.02 in)
b.
For flowlines and high strain testing: minimum allowable CTOD shall be 0.25 mm
(0.01 in)
The Charpy impact test temperature shall be at a minimum of -20 °C (-4 °F) and
CTOD at a minimum of 0 °C (32 °F).
PIPE ENDS
1.
Pipe ends shall be either bevelled or square cut, as required by the order form.
2.
When a bevel angle is specified, the plus or minus tolerance shall be 2 1/2°, unless
otherwise specified.
3.
Root face shall be as described by Clause 9.12.5.2 of ISO 3183:2012
th
/API SPEC 5L 45 edition, except the following:
a.
There shall be no internal bevel resulting from removal of the internal burr.
4.
The inside diameter of each end of each pipe for a distance of 102 mm (4 in) from the
end shall be as specified in Table J.3, but not be more than 1.6 mm (0.063 in) larger,
nor more than 1.6 mm (0.063 in) smaller than specified, as measured with inside
calipers, inside micrometers, a rod gauge, or similar device.
5.
For SCR applications the inside diameter of each end of each pipe for a distance of
102 mm (4 in) from the end, shall not be more than 1.6 mm (0.063 in) larger, nor more
than 1.6 mm (0.063 in) smaller than specified.
6.
The inside diameter at the ends may be machinedwith the termination of the
machining parallel over 200 mm (8 in) of the pipe, and all wall thickness tolerances
maintained.
7.
If end machining is required to meet the tolerances in (3.5 item 5), the Manufacturer
shall submit a procedure to the Principal for approval.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 87
3.6
3.7
NON-DESTRUCTIVE INSPECTION
1.
After all manufacturing and heat treatment procedures have been completed on
seamless pipe, the entire steel volume of each length of pipe (100%) shall be
inspected by both ultrasonic and electromagnetic methods in accordance with this
th
DEP and Annexes E and K of ISO 3183:2012/API SPEC 5L 45 edition, and the
additional requirements of this section.
2.
Prior to edge preparation and forming, all plate (100%) for SAW pipe shall be
subjected to an ultrasonic examination in accordance with this DEP and Annexes E
th
and K of ISO 3183:2012/API SPEC 5L 45 edition to detect discontinuities parallel to
the rolled surfaces.
3.
The ultrasonic examination may be performed after the pipe fabrication is complete.
4.
All weld seams for SAW pipe shall be inspected full length (100%) by ultrasonic
examination in accordance with this DEP and Annexes E and K of
th
ISO 3183:2012/API SPEC 5L 45 edition.
5.
For steel catenary riser pipe, the ultrasonic testing equipment shall be qualified and
approved in accordance with Shell Quality Services’ TC 11.1 Rev. 1 (16 August 2001)
“Quality Services’ Process for Performing UT/EMI System Capability Study”.
6.
Each length of pipe shall be measured along the full length for wall thickness.
7.
There shall be no laminations within 150 mm (6 in) of the pipe ends.
WORKMANSHIP
1.
The pipe shall contain no dents that affect both the outside surface and the inside
surface.
2.
The pipe shall contain no dent on the outside surface with a depth exceeding 1.6 mm
(0.063 in) for seamless pipe and 0.8 mm (0.03 in) for SAW pipe.
a.
3.
For the whole order, there shall be no more than 0.5% of the pipe welds repaired
(excluding minor surface indications repaired by grinding only).
a.
3.8
Dents shall not be pounded out or jacked out.
Individual repair by welding shall not be performed more than once.
MARKING AND COATING
1.
Refer to the order form for any additional marking requirements, including the
requirement for marking in US units and conformance to US anti-dumping regulations.
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 88
APPENDIX 4
PROCEDURE REQUIREMENTS FOR NDT
Table 4.1
Inspection process essential variables
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26
DEP 31.40.20.37-Gen.
February 2017
Page 89
APPENDIX 5
LINE PIPE ORDER FORM
This document has been supplied under license by Shell to:
Worley Parsons Oman Engineering LLC altaf.patel@worleyparsons.com 09/10/2018 08:20:26