DEP SPECIFICATION
Copyright Shell Group of Companies. No reproduction or networking permitted without license from Shell. Not for resale
POSITIVE MATERIAL IDENTIFICATION (PMI) PROGRAM
DEP 31.10.00.10-Gen.
September 2013
ECCN EAR99
DESIGN AND ENGINEERING PRACTICE
DEM1
© 2013 Shell Group of companies
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written permission of the copyright owner or Shell Global Solutions International BV.
This document contains information that is classified as EAR99 and, as a consequence, can neither be exported nor re-exported to any country which is under an
embargo of the U.S. government pursuant to Part 746 of the Export Administration Regulations (15 C.F R. Part 746) nor can be made available to any national of such
country. In addition, the information in this document cannot be exported nor re-exported to an end-user or for an end-use that is prohibited by Part 744 of the Export
Administration Regulations (15 C.F.R. Part 744).
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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 respons bility, 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.
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September 2013
Page 3
TABLE OF CONTENTS
1.
1.1
1.2
1.3
1.4
1.5
1.6
1.7
INTRODUCTION ........................................................................................................ 4
SCOPE........................................................................................................................ 4
DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS ......... 4
DEFINITIONS ............................................................................................................. 4
CROSS-REFERENCES ............................................................................................. 6
SUMMARY OF MAIN CHANGES ............................................................................... 6
COMMENTS ON THIS DEP ....................................................................................... 7
DUAL UNITS ............................................................................................................... 7
2.
GENERAL................................................................................................................... 8
3.
PMI PROGRAM MAIN ELEMENTS ........................................................................... 8
4.
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
POSITIVE MATERIAL IDENTIFICATION .................................................................. 9
EXTENT OF ALLOY COMPONENTS SUBJECT TO PMI ......................................... 9
ALTERNATE PMI PROGRAMS ................................................................................. 9
ALLOY ELEMENTS REQUIRED TO BE EVALUATED DURING PMI TESTING ...... 9
MATERIALS AND COMPONENTS NOT SUBJECT TO PMI TESTING .................... 9
TIMING AND LOCATION OF PMI CHECKS ............................................................ 10
WELDING CONSUMABLES..................................................................................... 10
GENERAL REQUIREMENTS FOR CERTIFICATION ............................................. 11
CONTROLS FOR CARBON STEEL MATERIALS ................................................... 11
PMI OF GASKETS .................................................................................................... 12
5.
EXAMINATION EQUIPMENT/TEST METHOD ....................................................... 12
6.
6.1
6.2
6.3
MATERIAL TRACEABILITY .................................................................................... 13
GENERAL ................................................................................................................. 13
MARKING ................................................................................................................. 13
COLOR CODING ...................................................................................................... 13
7.
7.1
7.2
7.3
MATERIAL IDENTIFICATION.................................................................................. 14
GENERAL ................................................................................................................. 14
MATERIAL IDENTIFICATION CODES .................................................................... 14
REJECTED MATERIAL ............................................................................................ 15
8.
INSPECTION REPORT ............................................................................................ 15
9.
REFERENCES ......................................................................................................... 24
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1.
INTRODUCTION
1.1
SCOPE
This DEP specifies requirements and gives recommendations for alloy material control and
handling practices to be applied during all phases of a project or repair/replacement work to
guard against the installation of rogue materials for pressurized equipment.
The material control elements in this DEP apply to bulk and specialty components,
fabricated piping and equipment, and both on-site and at off-site fabrication.
Alloy materials, as it pertains to this DEP, includes any materials that contain alloying
elements such as chromium, nickel or molybdenum that are intentionally added to enhance
the mechanical or physical properties and/or corrosion resistance. The term alloy includes
special grades of carbon steel such as low temperature (LT) and sour service grades.
This DEP defines the minimum required sample (percentage), elemental analysis
requirements and other verification steps based on the alloys of construction and the
component type.
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.
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.
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
Principal.
The word shall indicates a requirement.
The capitalised term SHALL [PS] indicates a process safety requirement.
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The word should indicates a recommendation.
1.3.2
Specific definitions
Term
Definition
Alloy Material
Any metallic material (including welding filler materials) that contain alloying
elements that are intentionally added to enhance mechanical or physical
properties and corrosion resistance, or a combination thereof
(e.g., Chromium, Nickel, or Molybdenum).
Alloy System
A piping system or pressure equipment for which a specific alloy material
has been selected to suit the process conditions to which it will be exposed.
Distributor
A warehousing Supplier for one or more Manufacturers or Suppliers of alloy
materials or components.
Level of
Examination
The specified percentage of the number of components (or weldments
when specified) to be examined in an inspection lot.
Fabricator
One who fabricates piping systems or portions of a piping system as
defined by ASME B31.3, or process pressure equipment, instrumentation or
machinery.
Heat of
Material
Heat (melt) from which materials or components having the same physical
or chemical properties are produced.
Inspection
Lot
A group of items or materials of the same type from a common source from
which a sample is to be drawn for examination.
NOTE:
An inspection lot does not include items from more than one heat.
Inspection
Test Plan
A step by step plan outlining special inspection steps that should occur
during the fabrication/assembly process.
Lot Size
The number of items available in the inspection lot at the time a
representative sample is selected.
Material
Manufacturer
An organization that performs or supervises and directly controls one or
more of the operations that affect the chemical composition or mechanical
properties of a metallic material.
Material Nonconformance
A positive material identification (PMI) test result that is not consistent with
the selected or specified alloy.
Material
Supplier
An organization that supplies material furnished and certified by a material
Manufacturer, but does not perform any operation intended to alter the
material properties required by the applicable material specification.
NOTE:
Material Manufacturer and Supplier may be the same party if the Manufacturer
supplies directly to the shop fabricator, field fabricator, or Principal.
Material
Verification
Program
A documented quality assurance procedure used to assess metallic alloy
materials (including weldments and attachments where specified) to verify
conformance with the selected or specified alloy material designated by the
owner/user.
Mill Test
Report
(MTR)
A certified document that permits each component to be identified
according to the original heat of material from which it was produced and
identifies the applicable material specification (including documentation of
all test results required by the material specification).
Positive
Material
Identification
(PMI) Testing
Any physical evaluation or test of a material to confirm that it is consistent
with the selected or specified alloy material designated by the Principal.
Evaluations or tests may provide either qualitative or quantitative
information that is sufficient to verify the nominal alloy composition (this
DEP accepts only quantitative testing for PMI).
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1.4
DEP 31.10.00.10-Gen.
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Term
Definition
PressureContaining
Components
Items that form the pressure-containing envelope of the operating
components and piping systems. This includes on-line instrumentation up to
and including the first isolation valve of off-line instrumentation.
Random
Selection process by which choices are made in an arbitrary and unbiased
manner.
Representati
ve Sample
One or more items selected at random from the inspection lot that are to be
examined to determine the acceptability of the inspection lot.
Rogue
Material
Equipment or piping components that accidentally end up in a specific alloy
(or special carbon steel) system, but do not meet the materials selection
criteria for that system. This includes welding consumables.
Standard
Reference
Materials
Sample materials for which laboratory chemical analysis data are available
and are used in demonstrating test instrument accuracy and reliability.
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 (9).
1.5
SUMMARY OF MAIN CHANGES
This DEP is a revision of the DEP of the same number dated February 2013. The following
are the main, non-editorial changes.
Section/Clause
Change
4.4 h)
4.9,
Table 1, Note
11
The change of standard spiral wound gasket materials from 304 SS
to 316 SS gasket materials to be consistent with
DEP 31.38.01.11-Gen. (Piping - General Requirements).
4.8 a)
Deleted “and hydrofluoric service” from 4.8, Item a).
Table 3, Note 4
Hydrofluoric Acid service carbon content requirement clarification in
Table 3 ‘per the specified grade (e.g., min / max requirements per
A333-6)’ to be consistent with DEP 31.38.01.11-Gen. (Piping General Requirements) and pipe class 31310.
Table 1 and 2
Removal of the instrumentation components from Table 1, and
consolidated into Table 2.
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1.6
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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)
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.
DEP Standard Form
(Other users)
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.
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2.
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GENERAL
A PMI program, approved by the Principal, containing all elements of (3), SHALL [PS] be in
place for all new construction project or repair/replacement work.
The PMI program shall cover the minimum required sample (percentage), the elemental
analysis requirements and other material verification steps contained in this DEP, based on
the alloys of construction and the component type. The requirements contained in this DEP
shall be incorporated into the materials quality assurance systems to be applied during all
phases of a project in order to guard against the installation of rogue materials that may
adversely affect the integrity of the plant pressure envelope and process reliability.
Additional, PMI may be specified if deemed necessary by the Principal.
For simplicity, the more commonly used term Positive Materials Identification (PMI) is used
throughout this DEP. Wherever reference is made to Positive Materials Identification or
PMI, it shall be understood to include the broader aspects of alloy material control and
handling practices.
When alloy materials are specified for hydrofluoric acid service, sour service, or low
temperature grades (i.e., alloys with residual element control), PMI SHALL [PS] be
implemented to guard against rogue materials that can lead to loss of containment of the
pressure envelope or process reliability incidents.
PMI shall be applied to both individual material components and fabricated assemblies
(e.g., piping spools), as specified in this DEP.
The components requiring PMI in this DEP shall be understood to include the pressure
containing parts that form the pressure envelope of the equipment or whose failure could
affect the pressure retaining capability of the equipment or component. PMI of nonpressure retaining components shall be specified if there is a significant reliability risk due
to component failure.
Any deviation from the examination requirements or a reduction in the percentage of PMI
specified in this DEP (e.g., based on the severity of service) shall be subject to approval of
the Principal and shall be verified by the required technical authority.
Further guidance on material verification can be found in API RP 578.
3.
PMI PROGRAM MAIN ELEMENTS
The elements covered by the PMI program shall include:
a) Levels of examination, including alloy elements required for PMI, examination
equipment/methods, materials and components not subject to PMI testing, and
rejected material disposition.
b) Documentation, records, receipt and issuing of materials, PMI testing of welding
consumables, controls for carbon steel materials, and PMI of gaskets.
c) Material traceability during fabrication and machining, the timing and location of PMI
in accordance with the Inspection and Test Plan (ITP), including transfer of
identification markings (e.g., heat numbers) and color coding.
d) Material identification of components on which PMI tests are performed, e.g., the
material identification code system on components.
e) Inspection reports documenting the PMI examination for component (e.g., for piping,
with line number and pipe spec, including the spool or fabrication drawing) showing
the locations of PMI tests by the shop/field Fabricator or field fabricator.
The PMI program shall include definition and management controls for the following work
processes:
•
Receipt of Materials - controls for segregation and storage of materials, material test
report validation and PMI and component identification from the Suppliers per the
scope of this specification.
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•
Issuance of Materials – Controls for the issuance and tracking of materials and
components and welding consumables during fabrication. This includes controls
during fabrication, such as the segregation of materials, materials traceability and
identification during the fabrication process. This includes segregation of tools where
applicable to prevent contamination.
•
Surplus Materials – the control and traceability of surplus materials, including the
return and accounting of all surplus or rejected materials.
The PMI program output shall include the compilation of auditable material traceability
records in accordance with (8). These records shall be included as part of the handover
documentation packages and shall include final field verification on completed systems.
Refer to DEP 82.00.10.30-Gen. for additional document handover requirements.
4.
POSITIVE MATERIAL IDENTIFICATION
4.1
EXTENT OF ALLOY COMPONENTS SUBJECT TO PMI
The extent of required PMI SHALL [PS] be either “Standard” or “Full” in accordance with
Table 1 and Table 2, or in accordance with (4.2). Table 1 defines the percentage of
components subject to PMI for all items other than instrumentation. Table 2 applies to
instrumentation.
For all grades of Type 304 stainless steel (i.e., 304L, 304, and 304H), the extent of PMI
shall be “Standard” and subject to requirements in the notes of Table 1 and Table 2.
For services where the addition of alloying agents may adversely affect the material
properties in service, these components shall be tested in accordance with “Full”.
For all other alloy materials including all grades of Type 316 stainless steel, the extent of
PMI shall be “Full” for both wrought base material and welds and subject to requirements in
the notes in Table 1 and Table 2.
Refer to (4.4) for materials and components not subject to PMI testing.
4.2
ALTERNATE PMI PROGRAMS
Implementation of an alternative PMI Program that defines the extent of PMI based on risk
may be permitted, subject to the approval of the Principal.
For limited numbers of speciality components (e.g., sub-sea blocks), where there are
suitable material controls in place, such as extensive material traceability or destructive
testing, these controls may be used in lieu of full PMI, subject to the approval of the
Principal.
4.3
ALLOY ELEMENTS REQUIRED TO BE EVALUATED DURING PMI TESTING
The individual alloy elements listed in Table 3 shall be evaluated during PMI testing, based
on the specified alloy grade.
4.4
MATERIALS AND COMPONENTS NOT SUBJECT TO PMI TESTING
Unless otherwise specified by the Principal, the following materials shall not be subject to
PMI testing:
a) All grades of carbon steel for use in normal refinery and chemical plant service,
except as specified in (4.8) in specialty services, such as low temperature (LT), sour
service, HF service, etc.
b) Internal valve components that are standard from the Manufacturer.
NOTE:
High alloy valve trim upgrades that are performed in a valve modification shop are not
exempt.
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c) All standard cast 304 and 316 stainless steel valves, control valves and machinery
components. In services where the molybdenum content is critical, such as
naphthenic acid services, 316 SS components shall be tested.
d) Internal parts of machinery and pumps made of type 304, 316 stainless steel or
brass.
e) Instrumentation, such as orifice plates, venturi internals; and secondary (e.g., that is
downstream of primary block valve) tubing and components that are made from 304,
304L, 316 and 316L stainless steel or copper.
f)
All cast brass valves.
g) Auxiliary equipment such as machinery lube oil systems, hydraulic systems, steam
tracing and steam turbine gland vacuum systems.
h) Standard (316 stainless steel) spiral wound gasket materials. Higher alloy spiral
wound gasket materials require PMI testing based on the Table 1 minimum
requirements.
4.5
TIMING AND LOCATION OF PMI CHECKS
The approved PMI procedure shall specify when PMI will be performed through the various
stages of the project. Assurance shall be maintained that the materials installed in the field
meet the design specifications. This includes:
a) During receiving inspection when components or materials arrive at site,
b) Prior to storage in the warehouse or delivery to the on-site fabrication shop or to the
field.
c) At a Fabricator/Supplier’s facility prior to delivery to the site.
d) During assembly, machining, or fabrication per the ITP, e.g., at the fabrication shop.
e) On completed piping systems (including welds), after field installation of pipe spools
at the appropriate stage of turnover of systems (e.g., final punch listing).
In addition to physical PMI checks, verification of material test reports, material
stamps/markings, quantity verification, and segregation of materials is required.
4.6
WELDING CONSUMABLES
Pressure retaining alloy welds SHALL [PS] be subject to the level of PMI specified in (4.1).
The PMI assurance process for welds shall include:
a) Approval of welding consumable Suppliers and the use of only approved
consumables.
b) Controlled storage, handling, quarantining, and issuing of welding consumables.
This includes the controlled issuing of consumables and returning of un-used
consumables.
c) PMI testing of welding consumables based on testing of batches.
d) Controls before, during, and after the welding process including inspection and
testing, quality control and assurance measures.
e) Non-conformance and corrective action measures.
When welding is conducted, one electrode or wire sample from each lot or package of alloy
weld rod should be positively identified. The remainder of the lot should be compared to the
sample to verify that the markings of the wires/electrodes are correct. Some weld rods have
the alloying elements contained in the flux, and do not meet the alloy specification until
welded. PMI testing of weld metal (e.g., deposited weld metal or undiluted weld “buttons”) is
a permissible alternative to PMI testing of an electrode, TIG wire, or wire sample.
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In addition to the PMI of each lot or package of alloy weld rod (e.g., for TIG root passes),
the final weld pass of applicable welds shall be PMI examined.
Analysis of the weld overlay SHALL [PS] be performed to verify the specified alloy chemical
composition and that the degree of alloy dilution is acceptable at the designated depth. This
analysis shall include the following:
4.7
i.
If the function of the overlay is corrosion protection, a volumetric or surface analysis
shall be complotted at a minimum depth of 1.5 mm (0.06 in) below the processcontacted surface.
ii.
If the function of the overlay is to assure product purity only, the sample shall be
taken at a minimum depth of 1 mm (0.04 in).
iii.
In cases of in-accessibility a weld test sample should be completed for analysis, and
tested per i) or ii). The test sample shall be welded for each welding process and for
each heat and lot of filler materials.
GENERAL REQUIREMENTS FOR CERTIFICATION
Material and final product minimum certification requirements and specifications shall be
specified (e.g., via a MESC), refer to DEP 31.38.01.11-Gen. for more details. In addition to
these requirements, the following also apply:
a) Material certificates shall comply with ISO 10474 or EN 10204.
b) The language used in material certificates shall be English. Certificates in other
languages are acceptable provided that these are accompanied by an endorsed,
stamped and dated English translation of the original certificate.
c) Certificates for final products (such as welded fittings) shall include certification of the
base material and a copy of the welding procedure qualification applied. If the
Manufacturer of a semi-finished product and the Supplier of the base material are
not the same, the certificate shall consist of two documents covering both stages of
the manufacturing process.
d) Certificates issued by material stock personnel or agents are not acceptable.
4.8
CONTROLS FOR CARBON STEEL MATERIALS
Carbon steel for use in general refinery and chemical plant service does not normally
require PMI controls or testing. However, for some services, micro alloying, restricted
chemistries and/or heat treatment of carbon steel material may be specified to ensure that
equipment will perform suitably in-service.
PMI testing/material verification of carbon steels shall be applied in the following services.
a) Sour service carbon steel materials and B7M bolting where HIC resistant material or
maximum hardness levels are specified.
b) Hydrofluoric acid service - carbon steel materials with restricted carbon content and
residual elements requirements.
c) Service where silicon (Si) content is critical to corrosion resistance (e.g., carbon
steels with low silicon may corrode at an accelerated rate when exposed to
hydrogen-free sulfidic conditions).
d) Low temperature (LT) service – where carbon steel with enhanced low temperature
properties (e.g. impact tested material) is specified.
e) Any other specific applications where carbon steel chemistry or properties are critical
to avoid failure and loss of containment.
Carbon steel components in services a), d), and e) above SHALL [PS] be verified by
matching heat numbers of components to certified test certificates per (4.7). Validation of
this requirement shall be included in the PMI report (8).
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Additional testing requirements for components in services a) through e) may include:
•
Hydrogen induced cracking sensitivity tests.
•
Impact toughness testing of base materials and welded coupons.
•
The use of specialty PMI testing equipment such as portable optical emission
spectroscopy devices to measure elements such as carbon, silicon, and other trace
elements.
Note(1):
(1)
Refer to NACE MR0103 and DEP 30.10.02.16-Gen.
The Principal shall specify when PMI testing or material verification is required for carbon
steels in other services.
LT carbon steel shall be fabricated in a separate area from carbon steel in order to avoid
mixing of component pipe materials and electrodes. Color codes shall be applied when
carbon steel and LT carbon steel piping are handled concurrently.
4.9
PMI OF GASKETS
PMI testing of gasketing shall be in accordance with Table 1.
Standard (316 stainless steel) spiral wound gasket materials are not subject to PMI testing;
see (4.4 h).
PMI of spiral wound gaskets shall be of the area at the ends where there is no filler or if
provided, the inner ring.
5.
EXAMINATION EQUIPMENT/TEST METHOD
Alloy analyzers shall be capable of producing quantitative measurements for the
percentage of elements listed in Table 3. Handheld, portable X-ray tube PMI analyzers are
typically preferred for safety and permitting reasons, but isotope analyzers are acceptable.
Portable optical emission spectroscopy devices have the advantage of being a reliable
means to measure light elements such as carbon content and aluminum outside of the
laboratory, therefore they are useful for testing for residual elements for carbon steel
materials in critical services. Refer to (4.8).
PMI inspection equipment of the following technology type is acceptable, and in order of
preference:
1. X-ray Tube Equipment (Handheld Analyzer)
2. X-Ray Florescence Equipment (Handheld Analyzer)
3. Optical Emission Spectrometers (Arc/Spark)
The alloy analyzer equipment type, Manufacturer, and model shall be approved by the
Technical Authority. The type of analyzer and alloy analyzer calibration records and results
shall be documented.
PMI testing shall be performed by a qualified technician.
Examination shall not be carried out with chemical spot testing or methods that use eddy
current, triboelectric testing, electromagnetic, or thermoelectric tests. These techniques are
mainly alloy sorters and do not provide specific alloy identification or measure elemental
composition.
Refer to API RP 578, Section 5 for more details on PMI test methods.
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6.
MATERIAL TRACEABILITY
6.1
GENERAL
Material traceability shall be maintained from procurement through final fabrication,
including all procurement, storage and fabrication activities from receipt of individual
components through final installation of pre-fabricated equipment and pipe spools (and
straight lengths of pipe) in the intended location. This includes traceability through the
stages of fabrication, grit blasting, painting and field installation. PMI and final quality
assurance checks may be required in the field to meet this requirement.
6.2
MARKING
All piping bulk materials shall be verified to be delivered with the original Manufacturer’s
markings clearly readable. The markings shall comply with the relevant material
specification (e.g., ISO, ASTM, etc.). Markings shall include the Manufacturer’s applicable
identification symbol, which shall match the identification shown on the material certificates.
When piping materials are ordered in the blasted and primed condition (e.g., straight length
pipes), the Manufacturer’s markings shall be preserved.
Markings applied by stock personnel and Suppliers may supplement the Manufacturer’s
markings (e.g., PO numbers or MESC codes) but shall not replace the Manufacturer’s
markings.
Carbon steel components in specialty services as described in (4.8) of this DEP
specification shall remain fully traceable by heat number as PMI testing of these
components is not feasible.
All components that require machining shall be traceable though the machining process by
transfer of the heat number to the component.
The heat numbers on completed piping spools shall be 100 % verified prior to release of
the spools for painting and/or field installation. This shall be a hold point on the piping
Inspection and Test Plan (ITP). This also applies to the transfer of heat numbers before
these materials are cut. Traceability of fabricated spools may be achieved by copying the
heat numbers onto the relevant shop fabrication isometric.
Completed shop fabricated pipe spools shall be fitted with an identification tag identifying at
least the Isometric number and spool number.
6.3
COLOR CODING
6.3.1
General
Color coding of piping bulk materials shall be applied on alloy or special carbon steel
systems. Color coding is one of the QA system tools intended to maintain material
traceability. Color coding is intended to supplement, not replace, the normal standard
identification requirements (e.g. Manufacturers’ markings, ASME, ASTM, MSS, etc.) of
components.
The material Supplier shall be responsible for the application of color coding. The coding
shall be checked by the Supplier’s QC department before being released for shipment to
site. The project organization’s procedure for color coding shall clearly address the critical
stage where pre-fabricated pipe spools are sent for blasting and painting. Color coding is
not necessary once the pipe spool is painted. For the spool to be released for painting all
components shall have been welded on and relevant NDE, including PMI, shall be
complete. The spool may then be tracked by the spool tagging number and isometric.
Refer to Table 5 for piping component marking specifications.
Piping components painted prior to fabrication is considered a higher risk approach. These
pre-fabrication components, in which identification markings (e.g., heat numbers) and color
coding will be removed by blasting, shall be audited and documented to assure PMI
traceability. The auditing shall document how traceability is maintained through the process
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of blasting, painting and assurance that the correct markings are re-applied. Auditing may
be done by an inspector not associated with the Fabricator who is approved by the
Principal. The re-application of color coding shall not be necessary once the components
are painted.
Piping components in which identification markings or color coding are maintained through
pipe spool fabrication may be released for painting as long as all relevant NDE, including
PMI, is complete. The spool shall then be tracked by the spool tagging number and
isometric. These fabricated spools, in which identification markings or color coding will be
removed by blasting, shall be validated visually and or by dimensions to assure PMI
traceability.
6.3.2
Color standard
The following color standards may be applied:
•
Pipe Fabrication Institute - PFI ES-22.
•
British Standards Institution BS 381C.
•
A suitable identification system or color standard as approved by the project
organization or Principal.
Color coding paint shall be resistant to saltwater atmosphere and tropical climate, and shall
be durable.
Paints and markers shall not contain harmful metals or metal salts such as zinc, aluminum,
lead or chlorides, sulphur, or other halogens that may be harmful to the alloy. Material
Safety Data Sheet (MSDS) documentation and paint data sheets shall be available for
review by the designated inspector.
7.
MATERIAL IDENTIFICATION
7.1
GENERAL
Components on which PMI tests are performed shall be identified with a PMI stamp stating
the material identification codes by means of a low-stress type marking tool, in accordance
with (7.2) and Table 4. Vibro-etching may be permitted for thin wall materials or if the
configuration of the component does not permit stamping.
Material identification codes specified in this DEP shall be required in addition to those
required by the applicable material specification (e.g., ASTM).
Pressure equipment subject to PMI examination shall have a PMI stamp on the code
nameplate. Pressure vessel internals, cladding, and cladding welds may be marked with
paints and markers identifying PMI was performed on each component, provided sufficient
documentation is in place for the PMI testing of all components. An additional nameplate for
the PMI stamp may be welded on or adjacent to the code nameplate.
Heat exchanger nameplate stamping shall identify the tube side and shell side separately.
On pressure vessels or heat exchangers, the type of component, such as “Internals”,
“Clad”, ”Overlay”, etc., shall be identified.
All piping welds subject to PMI testing shall be PMI stamped with the material identification
code, on the final weld pass, applied by means of a low-stress tool. When PMI of root or
intermediate pass welds is required, the PMI Inspection Report shall include a map
showing the location of each test.
Paints and markers shall comply with (6.3.2).
7.2
MATERIAL IDENTIFICATION CODES
Material identification codes shall be at least 6 mm (1/4 in) high and shall be applied by
means of a low-stress steel stamp.
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The letters “PMI” shall be circled on the internal side of shells, channels, clad and overlay.
High and low carbon stainless steel material shall be stamped with the letters “H” and “L”,
respectively, on the base material and the nameplate.
A material identification code that identifies the alloy shall be stamped on the base
materials and the nameplate. The code shall be located below the letters “PMI", within the
same circle if possible, as shown for piping in Figure 1.
Examples of material identification codes for alloys are given in Table 4.
7.3
REJECTED MATERIAL
Rejected material shall be identified by markings and segregated from acceptable material.
Replacement of rejected material shall be in accordance with the procurement contract.
The Supplier, shop Fabricator, or field Fabricator, as applicable, shall submit a nonconformance report to the Principal for the rejected material. The non-conformance report
shall identify the root cause and include a plan for corrective action.
If an item from a representative sample is rejected:
a) 100 % of the remaining components from which the sample was taken shall be
examined;
b) 100 % of the components from the next delivery from the same Manufacturer or
Supplier shall be examined;
c) If no further components are rejected in a) or b) above, the extent of examination
shall return to that originally specified.
8.
INSPECTION REPORT
A signed and dated record, documenting the PMI examination, shall be provided to the
Principal. Documentation packages shall be auditable and include material certificates,
material test records, transfer records, etc., necessary to provide assurance the materials
installed in the field meet the design specifications.
Fabricated items with multiple components and welds shall include a map showing the
location of each test. In particular, the PMI Inspection Report shall identify the following
items:
a) Each component PMI tested by the Manufacturer.
b) Each piece of equipment (with item number) PMI tested by the shop Fabricator,
including a test location map.
c) Each pipe line (with line number and pipe spec, including the spool or fabrication
drawing) showing the locations of PMI tests by the shop/field Fabricator or field
Constructor.
Results of PMI examinations shall be recorded on a PMI Inspection Report, which shall
include all the chemical elements required to be verified by Table 3, and all additional data
as required by this DEP. Reports downloaded from the alloy analyzer are acceptable.
The Inspection Report shall indicate at least the following for each inspection lot examined:
i.
Manufacturer/Fabricator's name.
ii.
Date(s) of testing.
iii.
PMI Procedure.
iv.
Name of person and company performing the test/qualifications of PMI testing
technician.
v.
Material Manufacturer, MTR number, heat number and lot number, as applicable.
vi.
Method of examination (laboratory or field analyzer).
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vii.
Type of analyzer and alloy analyzer calibration records and results.
viii.
Inspection lot size and number of pieces or items examined.
ix.
Results of the test and resolution of non-conformance material. Number and type of
each component inspected, rejected, and reason for rejection and the corrective
action taken.
x.
Mass percentage of elements, if specified by the material specification.
All of the above information and Inspection Reports shall be transmitted to the Principal.
Inspection Reports shall become part of the permanent record and included in the final data
package or equipment file folders.
Documentation associated with the PMI program shall be available for audit by the Principal
for a period of three years after the material/equipment has been supplied.
Table 1
Alloy components subject to PMI
Material
Full
Standard
Pipe (14)
ALL - 100 %
10 % (1,12)
Corrosion resistant Alloy (CRA) lined or clad pipe
ALL - 100 %
10 % (1,12)
Fittings (14)
ALL - 100 %
10 % (1,12)
Valves (7,14)
ALL - 100 %
10 % (1,12)
Expansion Joints and special items
ALL - 100 %
10 % (1,12)
Heater tubes (14)
ALL - 100 %
10 % (1)
Heat exchanger tubes
1 % (2)
1 % (2)
Tubesheets (14)
ALL - 100 %
10 % (4, 12)
Fittings (14)
ALL - 100 %
10 % (1, 12)
Solid or jacketed gaskets
ALL - 100 %
10 % (1)
Expansion joints
ALL - 100 %
10 % (4)
Non-pressure retaining bundle components: Baffles, tie-rods, seal
strips, etc
10 % (1)
10 % (1, 12)
Channels (14)
ALL - 100 %
10 % (4, 12)
Pipe (14)
ALL - 100 %
10 % (1, 12)
Furnace tube hangers
ALL - 100 %
10 % (1)
Furnace tube supports
ALL - 100 %
10 % (1)
Air Cooled Heat Exchanger Header Plugs and Gasket
ALL- 100%
10% (1)
Corrosion resistant Alloy (CRA) lined or clad components
ALL - 100 %
10 % (1,12)
Shell (14)
ALL - 100 %
10 % (4, 12)
Heads (14)
ALL - 100 %
10 % (4, 12)
Nozzles (14)
ALL - 100 %
10 % (1, 12)
Fittings (14)
ALL - 100 %
10 % (1, 12)
Flanges (14)
ALL - 100 %
10 % (1, 12)
Corrosion resistant Alloy (CRA) lined or clad components (14)
ALL - 100 %
10 % (1,12)
10 % (1)
10 % (1)
Piping
Heat exchangers, boilers, fired heaters
Pressure retaining components of pressure vessels
Non-pressure retaining components of pressure vessels
Tray components, downcomers, reactor bed internals
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Material
Full
Standard
Pump casing (14)
ALL - 100 %
100 %
Compressor casing (14)
ALL - 100 %
100 %
ASTM A193 bolts above B7/B7M (12) only
5 % (3)(13)
5 % (3)
Non-standard spiral wound gaskets (>316 SS)
5 % (11)
5 % (11)
solid metal, metal jacketed, ring-type joint gaskets
ALL - 100 %
10 % (1)
Welds (pressure equipment)
ALL - 100 % (5, 6)
5 % (8,9,10,12)
Weld (repairs)
ALL - 100 % (5, 6)
5 % (8,9,10, 12)
Welds (piping)
ALL - 100 % (5, 6)
5 % (5,8,10,12)
Weld overlay
ALL - 100 % (6, 8,9,10)
5 % (5,8,9,10,12)
Bellows
ALL - 100 %
100 %
Body (14)
ALL - 100 %
100 %
Bonnet (14)
ALL - 100 %
100 %
Rupture disc (14)
ALL - 100 %
100 %
Pressure retaining components of machinery
Bulk material
Welding
Pressure relieving equipment
NOTES:
1.
10 % of all the components purchased shall be examined. Components to be examined shall be
selected by the Principal. If any given sample of components has fewer than 10 items, one item shall be
examined.
2.
1 % representative sample of the total number of tubes from each heat, lot and material specification of
tubes.
3.
5 % of bolts supplied in bulk or two bolts per box, and per heat and lot, whichever is greater, shall be
examined. Bolts to be examined shall be selected randomly by the Principal.
4.
One examination per heat of material
5.
One spot on every cap pass of every pressure retaining weld or one cap pass per weld procedure per
spool of piping shall be examined in accordance with Table 1.
6.
For the buttering welding technique, the extent of PMI shall be determined by the Principal.
7.
Valve body and bonnet only. However, PMI testing of non-standard trim upgrades using high alloy
material such as alloy 400 trim is recommended in the modification shop. Internal bonnets as found on
“power seal” type valves are considered internal components as they typically cannot be accessed by
PMI analyzers.
8.
Analysis of the weld overlay shall be performed to verify the specified alloy chemical composition and
that the degree of alloy dilution is acceptable at the designated depth. This analysis shall include:
9.
a)
If the function of the overlay is corrosion protection, a volumetric or surface analysis shall be
completed at a minimum depth of 1.5 mm (0.060 in) below the process-contacted surface.
b)
If the function of the overlay is to assure product purity only, the sample shall be taken at a
minimum depth of 1 mm (0.040 in).
c)
In cases of in-accessibility, a weld test sample should be completed for analysis, and tested
per a) or b). The test sample shall be welded for each welding process and for each heat
and lot of filler materials.
One analysis per weld procedure shall be taken of the base filler material and/or overlay finished weld
per Note 8 (e.g., covering a base metal weld or joining the cladding of clad plates) on each major
longitudinal and circumferential weld seam. Refer to the requirements for the following specific
components:
a)
Nozzles: For nozzles and components lined with alloy weld metal overlay, one analysis per
nozzle is required. For sleeve lined nozzles, one analysis for the flange face overlay and of
the shell tie-in overlay is required.
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b)
Alloy Air Cooler Header Boxes: one analysis for each welding procedure used for long
seams, end plates, and nozzles is required.
c)
Machined components: the PMI analysis shall be completed on the finished machined
components.
10. Analysis of the base filler metal and/or final closure weld seams of internally clad or weld overlaid
components shall be made at location determined by the Principal's designated Inspector.
11. 5 % of spiral wound gaskets shall be tested when the windings or ID ring are higher alloy than 316 SS.
The PMI shall be of the area at the ends where there is no filler or if provided, the inner ring.
12. Equipment and piping fabricated of alloy material solely to maintain product purity is subject to 10 % PMI
including welds, with the exception of 304, 304L, 304H or 316, 316L, 316 H, unless otherwise specified
by the Principal.
13. 100 % of B7M bolting for HFA and sour service (if applicable) shall be tested for hardness as a part of
the PMI program.
14. Carbon steel and Alloy 400 intended for Hydrofluoric Acid service requires “Full” testing.
Table 2
PMI for instrumentation components
Instruments
Orifice plate
No PMI *
10 % PMI
100 % PMI
304/304L and
Higher alloy (2)
316/316L SS
304/304L and
316/316L SS
Thermowell, other type insertion type
instruments and positive displacement
meters (analyzer probes, FCI meters
and vortex meters)
Instrument tubing including insertion
type
Higher alloy (1, 2)
304/304L and
316/316L SS
Higher alloy (1, 2)
Cast 316 SS bu k
produced CV
Higher alloy (2)or all
Custom Cast
Standard trim from the
Manufacturer
High alloy trim upgrades at
valve modification shops
Displacer, magnetic level gauges and
level chamber
304/304L and 316/316L
SS components and
welds
Higher alloy (1,2)
Coriolis meters
304/304L and 316/316L
SS components and
welds
Higher alloy (1,2)
Fabricated meter runs and fabricated
304/304L and 316/316L
venturies (pressure retaining parts only)
SS components and
welds
Higher alloy (1,2)
Control valve (3,4)
Valve trim
NOTES:
1.
Includes venturies (external portion only), level bridles, Coriolis meter, magnetic level, displacer and
other instruments installed in pressure retaining service upstream of the primary block valve. Only the
accessible welds are to be tested in the field. Insertion type instruments such as thermowells,
annubars, capacitance probes, FCI flow meters are exempt because of the low stress level and
standard stainless construction. Insertion type instruments of alloys higher than 304/316 austenitic
stainless require PMI. Excludes items that are not pressure retaining or not in-line instruments
(downstream of the primary block valve), such as pressure transmitters.
2.
Higher alloy is 321SS, 347SS, all chrome alloys and high nickel alloy.
3.
Valve body and bonnet only. However PMI testing of non-standard trim upgrades using high alloy
material such as alloy 400 trim is recommended in the modification shop. Internal bonnets as found on
“power seal” type valves are considered internal components as they typically cannot be accessed by
PMI analyzers.
4.
Carbon steel and Alloy 400 intended for Hydrofluoric Acid service requires “Full” testing.
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Table 3
Alloy elements required for PMI
Chemical element
Alloy
C
Cr
Ni
Mo
AISI 8630
X
X
X
AISI 8620
X
X
X
AISI 4130
X
X
1Cr–1/2Mo
X
X
1-1/4Cr–1/2Mo
X
X
2-1/4Cr–1Mo
X
X
2-1/4Cr–1Mo–
1/4V
X
X
5Cr–1/2Mo
X
X
9Cr –1Mo
X
X
X
9Cr-1Mo modified
X
X
X
13Cr–4Ni
X
X
13Cr–4Ni /CA6NM
X
X
X
12Cr/CA15
X
X
X
304(1)
X
X
308
X
X
309(1)
X
X
310(1)
X
X
316(1)
X
X
X
317(1)
X
X
X
321(1)
X
X
347(1)
X
X
410(2)
X
X
430
X
X
Duplex
X
X
X
Super Duplex
X
X
X
SMO 254
X
X
X
F6NM
X
X
X
CD4Mcu
X
X
X
Alloy 20
X
X
X
6 Mo Alloys
X
X
X
Alloy C-276
X
X
X
Alloy 400(5)
Nb
Ti
Cu
Co
Al
Zn
Sn
V
X
X
X
X
X
X
X
X
X
X
X
X
X
Alloy 600
X
X
Alloy 625
X
X
X
X
X
Alloy 625 LCF
X
X
X
X
X
Alloy 800
X
X
Alloy 825
X
X
X
X
X
Pd
X
90/10 CuNi
X
X
70/30 CuNi
X
X
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Chemical element
Alloy
C
Stellites
Cr
Ni
X
X
Mo
Nb
Ti
Cu
Co
Al
Zn
Sn
Pd
V
X
304L(1,6)
X
X
X
304H(1)
X
X
X
308L(1,6)
X
X
X
309L(1,6)
X
X
X
410S(2)
X
X
X
316H
X
X
X
X
316L(1,6)
X
X
X
X
316H(1)
X
X
X
X
317L (6)
X
X
X
X
321H(1)
X
X
X
347H(1)
X
X
X
X
X
X
X
Tantalum(3)
Titanium Gr 2
X
Titanium Gr 7
X
Titanium Gr12
X
Titanium Gr 16
X
X
Zirconium(3)
Admiralty brass
X
X
X
Naval brass
X
X
X
Weld Overlayed
Surfaces(to match
specified
chemistry)
CS in HFA Service
(4)
X
X
X
X
NOTES:
1.
All 300-series stainless steel welds shall have the ferrite controlled between 4 % and 9 %. The ferrite
testing shall be tested at the same frequency as required for PMI.
2.
0.5 % to 0.75 % max Ni in base material and <1.1 % Ni for weld deposits.
0.1 % to 0.3 % Al.
0.2 % to 0.5 % Ti.
3.
Check alloying elements meet the ASTM specification.
4.
Carbon content per the specified grade (e.g. min / max requirements per A333-6) Cu+Ni+Cr<0.18 %
5.
Alloy 400 weld consumables shall contain Ti<2.2 %wt. and Fe<5 %wt. in Hydrofluoric acid service.
6.
The weld analysis shall meet the same composition limits as the corresponding base plate, and clad
materials except that carbon maximum of 0.045 % is acceptable in a deposit joining L grade austenitic
stainless steel cladding.
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Table 4
Material identification codes
Alloy
UNS number
Material
identification code
Alloy
UNS number
Material
identification code
1¼ Cr ½ Mo
K11597
1 CR
430
S43000
430
2¼ Cr 1 Mo
K21590
2 CR
Duplex
S31803 and
S32205
2205
2¼ Cr 1 Mo
¼V
K31835
2CR V
Super Duplex
S32750 and
S32760
2507
5 Cr ½ Mo
K41545
5 CR
Alloy 20
N08020
20
9 Cr 1 Mo
S50400
9 CR
6 Mo Alloys
N08367 and
N08925
6 Mo
13 Cr-4Ni, or
CA6NM
J91540
CA6NM
Alloy B2
N10665
B2
12 Cr, or
CA15
J91150
CA 15
Alloy C-276
N10276
276
304
S30400
304
Alloy 600
N06600
600
304L
S30403
304L
Alloy 625
N06625
625
304H
S30409
304H
Alloy 625LCF
N06626
626
308
S30408
308
Alloy 800
N08800
800
308L
S30883
308L
Alloy 825
N08825
825
309
S30900
309
90/10 CuNi
C70600
90/10
309L
S30983
309L
70/30 Cu/Ni
C71500
70/30
310
S31000
310
Alloy 400
N04400
400
316
S31600
316
Nickel 200
N02200
200
316L
S31603
316L
Titanium Gr 2
R50400
T-2
316H
S31609
316H
Titanium Gr 7
R52400
T-7
317
S31700
317
Titanium Gr 12
R53400
T-12
317L
S31703
317L
Titanium Gr 16
R52402
T-16
321
S32100
321
Zirconium 702
R60702
Z-702
321H
S32109
321H
Zirconium 705
R60705
Z-705
347
S34700
347
Tantalum
R05210
R05210
347H
S34709
347H
Tantalum 40 %
Nb
R05240
R05240
410
S41000
410
Admiralty
Brass
C44x00
C44x00
x = 3,4 or 5
x = 3,4 or 5
Naval Brass
C46x00
C46x00
x = 5,6 or 7
x = 5,6 or 7
410S
S41008
410S
Figure 1 provides examples of the locations where the Material Identification Codes shall be applied.
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ECCN EAR99
DEP 31.10.00.10-Gen.
September 2013
Page 22
Figure 1
Location of PMI identification marks for piping (examples)
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ECCN EAR99
DEP 31.10.00.10-Gen.
September 2013
Page 23
Table 5
Component
Pipe
(1),(2)
Fittings
Plate
Bolts
(1),(2)
(1),(2)
Valves
Each socket weld fitting, swage or pipe nipple shall be dabbed with a spot of
paint 12 mm (0.5 in) to 25 mm (1 in) in diameter.
The entire length of each butt weld fitting shall be painted on the outside
surface with a 12 mm (0.5 in) to 40 mm (1.6 in) wide stripe, depending on size.
The outer peripheral edge of each flange shall be painted over the entire
circumference. For flanges thicker than 25 mm (1 in), the width of the band
may be limited to 25 mm (1 in).
A stripe shall be painted across from corner to corner.
(1),(2)
(1),(2)
NOTES:
Marking
Each length of pipe shall be painted over the entire length with a 12 mm
(0.5 in) to a 40 mm (1.6 in) wide stripe, depending on pipe size.
(1),(2)
Flanges
Piping component marking specifications
Each welded or flangeless (wafer type) valve shall be dapped with a spot of
paint 12 mm (0.5 in) to 25 mm (1 in) in diameter.
Each flanged valve shall have the outer peripheral edge of each flange painted
over the entire circumference. For flanges thicker than 25 mm (1 in), the width
of the band may be limited to 25 mm (1 in).
Each stud bolt shall be dabbed with a spot of paint on each end.
1.
Paint shall not be applied, in any circumstances, to the following:
−
inside surfaces of pipe, flanges or fittings;
−
threads;
−
weld bevels;
−
symbols or markings which would obliterate identification;
−
gasket seating surface.
2.
Colour codes shall be applied when carbon steel and LT carbon steel are handled
concurrently.
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ECCN EAR99
9.
DEP 31.10.00.10-Gen.
September 2013
Page 24
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.
Evaluation of pipeline and pressure vessel steels for resistance to
hydrogen-induced cracking (amendments/supplements to
NACE TM0284)
DEP 30.10.02.16-Gen.
Piping - general requirements
DEP 31.38.01.11-Gen.
Engineering information specification (EIS)
DEP 82.00.10.30-Gen.
Design Engineering Manual (DEM) 1 - Application of Technical
Standards
DEM1
http://sww.manuals.shell.com/HSSE/
AMERICAN STANDARDS
Material verification program for new and existing alloy piping
systems
API RP 578
Process piping
ASME B31.3
Standard specification for alloy-steel and stainless steel bolting
materials for high temperature or high pressure service and other
special purpose applications
ASTM A193
Materials resistant to sulfide stress cracking in corrosive petroleum
refining environments
NACE MR0103
Recommended Practice for Color Coding of Piping Materials
PFI ES-22
Issued by: Pipe Fabrication Institute
BRITISH STANDARDS
Colours for identification, coding and special purposes
BS 381C
EUROPEAN STANDARDS
Metallic products - Types of inspection documents
EN 10204
INTERNATIONAL STANDARDS
Steel and steel products - Inspection documents
ISO 10474
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