Steel Fittings and Flanges
EES023
Engineering Equipment Specification
Enbridge Pipelines Inc.
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EES023
Engineering Equipment Specification
Document Version Control Register
1 Revision Summary
Version
Description
18.0
Complete revision
Reviewed and updated to reflect current industry standards and the Company’s best
engineering design practices.
2 Applicability
Version
Description
Version Date
18.0
This revision is applicable to all projects that have not received AFE
approval.
Projects with AFE approval shall continue to abide by the previous
revision.
If projects with AFE approval choose to adopt any changes of the
standard, a Project Decision Record is required.
For any standard revision, engineering consultants are to contact
their Enbridge project team for direction on reviewing and
incorporating revision changes.
For any standard revision, engineering consultants are to contact
their Enbridge project team for direction on reviewing and
incorporating revision changes.
2016-08-31
Note: For a detailed list of changes and approval, see change log (related documents section in the
GDL).
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Engineering Equipment Specification
Table of Contents
1 Scope ..................................................................................................................................... 1
1.1 General................................................................................................................................................ 1
1.2 Purchasing .......................................................................................................................................... 1
1.3 Exclusions ........................................................................................................................................... 2
1.4 Defined Parties .................................................................................................................................... 2
1.5 Deviations ........................................................................................................................................... 2
1.6 Keywords ............................................................................................................................................ 2
2 References ............................................................................................................................ 3
2.1 Company Publications ........................................................................................................................ 3
2.2 Industry Publications ........................................................................................................................... 3
2.3 Abbreviations ...................................................................................................................................... 4
2.4 Definitions ........................................................................................................................................... 4
3 General Requirements .......................................................................................................... 5
3.1 General................................................................................................................................................ 5
3.2 Flanges................................................................................................................................................ 5
3.3 Fittings – Scraper Bars........................................................................................................................ 5
3.4 Chemical Composition ........................................................................................................................ 5
4 Mechanical Test Requirements ............................................................................................ 6
4.1 Fittings ................................................................................................................................................. 6
4.2 Flanges................................................................................................................................................ 6
4.3 Rejection and Retests ......................................................................................................................... 6
5 Nondestructive Examination ................................................................................................ 7
5.1 General................................................................................................................................................ 7
5.2 Visual Examination.............................................................................................................................. 8
5.3 Examination – Fittings ......................................................................................................................... 8
5.4 Repair of Defects ................................................................................................................................ 8
6 Inspection and Testing ......................................................................................................... 9
6.1 General................................................................................................................................................ 9
7 Required Documentation...................................................................................................... 9
7.1 General................................................................................................................................................ 9
8 Marking and Shipping ..........................................................................................................10
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8.1 Marking.............................................................................................................................................. 10
8.2 Shipping ............................................................................................................................................ 10
9 Ordering................................................................................................................................10
9.1 General.............................................................................................................................................. 10
Appendix A Product Ordering Requirements .......................................................................11
A.1 Steel Fittings ..................................................................................................................................... 12
A.2 Steel Flanges .................................................................................................................................... 13
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Engineering Equipment Specification
1 Scope
1.1 General
1.1.1
This specification is to be used in conjunction with the latest applicable industry standards for
the manufacture, material requirements, inspection, and testing of butt-weld fittings and wrought
steel flanges intended for pipeline systems in Canada and the US. These pipeline systems
transport non-sour crude oil, refined products, and natural gas liquids. This specification
provides requirements that are in addition to those applicable industry standards.
1.1.2
This specification is applicable to the following:
a) Fittings and flanges from 60.3 mm OD to 1,219 mm OD (NPS 2 to NPS 48), inclusive
b) Flanges designated by nominal pressure classes from PN 20 to PN 150 (ASME Class 150
to ASME Class 900), inclusive
1.1.3
Requirements that are specific to the component’s installation location (i.e., Canada or the US)
have been clearly identified. If a requirement is not identified as pertaining to a specific
geographic location, the requirement applies to all installation locations.
1.1.4
The requirements of this document are also intended to comply with the following:
a) National Energy Board, Onshore Pipeline Regulations (SOR/99-294) and CSA Z662 for
Canadian applications
b) Code of Federal Regulations (CFR), Title 49, Part 195 and ASME B31.4 for US applications
1.2 Purchasing
1.2.1
All flanges and fittings shall comply with the applicable industry standards (refer to Section 2.2),
this specification, and the purchase order.
1.2.2
Design and dimensional requirements for fittings and flanges exceeding the size limits of the
industry standards shall require Company approval, attained through the Technical Standards
Deviation Request (TSDR) process.
1.2.2
All fittings and flanges shall be procured from Vendors and Manufacturers listed in the
Company's Approved Manufacturers List (AML).
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1.2.3
Vendors shall ensure that all sub-Vendors and Manufacturers are provided with all the relevant
technical documents and requirements (including but not limited to datasheets and this
specification) that are included in the purchase order.
1.3 Exclusions
The following are not within the scope of this specification:
a) Induction bends (refer to EES071)
b) Fittings and flanges intended for sour service
c) Fittings and flanges smaller than NPS 2 (refer to FCS013 or UFC013 as applicable)
d) Split sleeves (refer to EES005)
e) Split tee fittings (refer to EES149)
f)
Specialty fittings (e.g., line stopples and other Vendor proprietary designs such as ThreadO-Ring and Lock-O-Ring fittings and flanges. Where such fittings and flanges are required
to be installed, the requirements of sections 3 – 7 shall apply as a minimum.)
1.4 Defined Parties
In this document, the term “Company” shall hereafter refer to Enbridge Inc. and its
representatives.
The term “Manufacturer” shall hereafter refer to any and all involved parties that manufacture
the equipment and products.
The term “Vendor” shall hereafter refer to any and all involved parties that supply and distribute
the equipment and products.
1.5 Deviations
The requirements of this standard shall govern. Any and all deviations from this standard shall
be documented and requested in accordance with the Technical Standards Deviation Request
procedure or the Technical Standards Noncompliance Management procedure, as required.
1.6 Keywords
In this document, “shall” is used to express a mandatory requirement; “should” is used to
express a recommendation or that which is advised but not required; and “may” is used to
express an option or that which is permissible within the limits of the document.
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Engineering Equipment Specification
2 References
2.1 Company Publications
This document refers to the following publications created by the Company; where such
reference is made, it shall be to the latest edition unless otherwise specified.
Engineering Standards
Engineering Equipment Specification
EES005: Split Sleeves
Engineering Equipment Specification
EES071: Steel Pipe Induction Bends (Supp to ASME B16.49)
Engineering Equipment Specification
EES149: Full-Encirclement Tee Fittings
Facility Construction Specification (Canada)
FCS013: Piping Class NPS 6 and Under
Facility Construction Specification (US)
UFC013: Piping Classes
2.2 Industry Publications
This document refers to the following publications/standards created within industry; where such
reference is made, it shall be to the latest edition unless otherwise specified.
ASME (ASME International)
ASME/BPVC SEC V
Nondestructive Examination
ASME/BPVC SEC VIII-1
Rules for Construction of Pressure Vessels – Division 1
ASME/BPVC SEC IX
Qualification Standard for Welding, Brazing, and Fusing Procedures; Welders; Brazers; and
Welding, Brazing, and Fusing Operations
B16.5
Pipe Flanges and Flanged Fittings NPS ½ through NPS 24 Metric/Inch Standard
B16.9
Factory-Made Wrought Buttwelding Fittings
B16.47
Large Diameter Steel Flanges NPS 26 through NPS 60 Metric/Inch Standard
B31.4
Pipeline Transportation Systems for Liquids and Slurries
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Engineering Equipment Specification
ASTM (ASTM International)
A516/A516M
Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and LowerTemperature Service
CSA (Canadian Standards Association)
Z245.11
Steel Fittings
Z245.12
Steel Flanges
Z662
Oil and Gas Pipeline Systems
Government of Canada
SOR/99-294
National Energy Board Act, Onshore Pipeline Regulations
Government of the United States of America
Code of Federal Regulations (CFR) Title 49, Part 195
Transportation of Hazardous Liquids by Pipeline
MSS (Manufacturers Standardization Society)
SP-44
Steel Pipeline Flanges
SP-75
High-Strength, Wrought, Butt-Welding Fittings
2.3 Abbreviations
The following abbreviations are applicable to this document only:
MTR
Material test report
NDE
Nondestructive examination
PO
Purchase order
SMYS
Specified minimum yield strength
2.4 Definitions
The following definitions are applicable to this document only:
Fittings
Components such as elbows, tees, reducers, caps, integrally reinforced branch connection
fittings, barred tees, and lap joint stub ends (for the purposes of this standard, the term fittings
also includes extruded headers)
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Engineering Equipment Specification
3 General Requirements
3.1 General
3.1.1
The grade of steel for all fittings and flanges shall not exceed those grades with an SMYS of
483 MPa (70 ksi).
3.1.2
With the exception of fittings and flanges that are not required to be welded during construction
(e.g., blind flanges, spacers), the actual yield strength determined on any qualification test shall
not exceed the grade SMYS by more than 131 MPa (19 ksi).
3.2 Flanges
All flanges shall be raised face.
3.3 Fittings – Scraper Bars
When scraper bars are required, the welding, post-weld heat treatment, and inspection
requirements of installed scraper bars shall be in accordance with CSA Z245.11 in Canada and
MSS SP-75 in the US. Scraper and spacer bars shall be ASTM A516/A516M Grade 70.
3.4 Chemical Composition
3.4.1
Heat and product analysis shall meet the requirements of the relevant codes and standards
listed in Section 2.
3.4.2 Canada
3.4.2.1
The carbon equivalent (CE, %) of steel fittings and flanges certified to CSA Z245.11 and CSA
Z245.12, respectively, shall be no greater than 0.45 for all grades less than 290 and no greater
than 0.43 for all grades 290 and higher as calculated by the following formula:
Mn
Si
Cu
Ni
CE(CSA) = C + F ( 6 + 24 + 15 + 20 +
Cr+Mo+V+Nb
+ 5B)
5
(Eq. 3.1)
Refer to CSA Z245.11 and CSA Z245.12 for the compliance factor, F.
3.4.2.2
For steel fittings and flanges certified to other acceptable standards (e.g., ASME), the carbon
equivalent shall be no greater than 0.45, calculated as follows:
a) The carbon equivalent for all fittings and flanges of grades higher than Grade 386 shall be
calculated per the formula in Equation 3.1, above.
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Engineering Equipment Specification
b) The carbon equivalent for all lower grade fittings and flanges up to and including Grade 386
shall be calculated per the following formula:
Mn
CE(IIW) = C + 6 +
Cu+Ni
Cr+Mo+V
+
15
5
(Eq. 3.2)
3.4.3 US
For all steel fittings and flanges, the carbon equivalent shall be no greater than 0.45 as
calculated by the formula in Equation 3.2, above.
3.4.4
The CE limits given in sections 3.4.2 and 3.4.3 do not apply to fittings and flanges that are not
required to be welded during construction (e.g., blind flanges, spacers).
4 Mechanical Test Requirements
4.1 Fittings
4.1.1 Canada
In addition to the tests required by CSA Z245.11, hardness tests at a frequency of one test per
lot are required for the finished fittings (“lot” shall be as defined in CSA Z245.11).
4.1.2 US
Refer to the completed datasheet(s) supplied with the purchase order (PO) for any additional
requirements beyond industry standards.
4.2 Flanges
4.2.1 Canada
In addition to the tests required by CSA Z245.12, hardness tests at a frequency of one test per
lot are required.
4.2.2 US
Refer to the completed datasheet(s) supplied with the PO for any additional requirements
beyond industry standards.
4.3 Rejection and Retests
If any test fails to meet the requirements of the industry standard or specification, a retest shall
be conducted on a second item from the same lot. If any retest also fails, all fittings or flanges
manufactured from the lot shall be rejected.
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Engineering Equipment Specification
5 Nondestructive Examination
5.1 General
5.1.1
Flanges and fittings shall be free of defects and shall have a competently produced finish.
5.1.2
For flanges, defects shall be defined as follows:
a) Cracks
b) Sharp notches
c) Mechanical marks, abrasions, and pits that are deeper than 1.5 mm (0.06 in.) or that result
in the thickness of the remaining metal being less than that specified in the applicable
standard
d) Seams, laps, tears, scabs, slivers, and other imperfections that are deeper than 1.5 mm
(0.06 in.), deeper than 5% of the thickness at the point of the imperfection, or result in the
thickness of the remaining metal being less than that specified by the applicable standard
5.1.3
For fittings, defects shall be defined as follows:
a) Sharp notches, scratches, scabs, seams, laps, tears, slivers, and cracks; other
imperfections, excluding dents, that result in a wall thickness less than that allowed by the
applicable standard
b) Dents described by one or more of the following criteria:
i.
Dents that are deeper than 1.5 mm (0.06 in.), are located in the body of the fitting, and
contain a stress concentrator such as a gouge, groove, or arc burn
ii. Dents that are located on the weld and are deeper than 1.5 mm (0.06 in.)
iii. For NPS 12 and smaller fittings, plain dents that are deeper than 6.3 mm (0.25 in.)
iv. For fittings larger than NPS 12, plain dents that are deeper than 2% of the nominal fitting
size.
5.1.4 Nondestructive Examination Techniques
Nondestructive examination techniques shall be in accordance with the following specific
requirements of ASME/BPVC SEC VIII-1:
a) Radiographic examinations shall be per UW-51.
b) Magnetic particle examinations shall be per Appendix 6.
c) Liquid penetrant examinations shall be per Appendix 8.
d) Ultrasonic examinations shall be per Appendix 12.
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5.1.5 Nondestructive Examination Defect Acceptance Criteria
5.1.5.1 Canada
Unless otherwise specified, defect acceptance standards and requirements for repair shall be
as specified in CSA Z245.11 or CSA Z245.12, as applicable.
5.1.5.2 US
Defect acceptance standards and requirements for repair shall be as specified in ASME/BPVC
SEC VIII-1 or in the material specification, as applicable.
5.2 Visual Examination
5.2.1
Each fitting and flange shall undergo a complete visual examination for the defects,
imperfections, and discontinuities mentioned in the relevant manufacturing standards. This shall
include the inside and outside weld seams (where applicable). Visual examination techniques
shall be in accordance with ASME/BPVC SEC V Article 9.
5.2.2
If heat treatment is required, visual examination shall be performed after final heat treatment.
5.3 Examination – Fittings
5.3.1
All welded seams of fittings shall be radiographically examined along their full length. With prior
written Company approval, ultrasonic examination can be used as an alternate technique for
butt-weld examination. If heat treatment is required, radiography/ultrasonic testing shall be
performed after final heat treatment.
5.3.2
The finished bevel faces of welding ends for all fittings manufactured from flat rolled plate/coil or
welded pipe shall be examined by magnetic particle (wet colour contrast only) or liquid
penetrant methods for the presence of laminar-type discontinuities or defects. The accumulated
length of such indications shall not exceed 6 mm (0.25 in.) in any 50 mm (2 in.) of
circumference.
5.3.3
All arc burns shall be removed prior to final heat treatment. Removal of arc burns shall be
verified via the use of an etchant such as 5% Nital or 10% ammonium persulphate.
5.4 Repair of Defects
Weld repair of defects found in bevel end preparations or on the external radii of drawn outlets
on extruded outlet fittings, tees, or headers is not permitted. Weld repairs shall be performed
using a qualified ASME/BPVC SEC IX procedure prior to final NDE and shall be performed by
welders qualified per this ASME standard.
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6 Inspection and Testing
6.1 General
6.1.1
Inspection and testing requirements shall be in accordance with the applicable industry
standards, this specification, and the PO. The PO shall include requirements for any inspection
to be performed by the Company.
6.1.2
For fittings and flanges procured from Manufacturers, a production schedule shall be provided
to the Company to enable Company representation for any examinations at hold or witness
points per the details indicated in the purchase order.
7 Required Documentation
7.1 General
7.1.1
a) The following documentation shall be provided (as applicable):Drawings of extruded
headers, barred tees, and any items for which the dimensions are not covered by the
relevant industry standards. Drawings/documentation (including any calculations) requiring
approval by the Company prior to manufacture shall be submitted in accordance with the
purchase order.
b) A material test report (MTR) that includes the following:
i.
Heat and product analysis and carbon equivalent
ii. Mechanical properties: tensile and yield strength; percentage elongation; notch
toughness; heat treatment, including temperatures; hardness
iii. Nondestructive examination (NDE) results
c) Source material
d) Any approved deviation requests
e) Any special requirements contained in the accompanying purchase order, including
additional test results such as guided bend tests, etc. These results can be included in the
MTR.
7.1.2
For fittings with welds, nondestructive examination and mechanical test results shall be shown
for both the body and the weld.
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8 Marking and Shipping
8.1 Marking
In addition to the requirements of the applicable industry codes and specifications, the tag
number shall be paint stencilled on each item. The tag number is a unique identifier for material
tracking records.
8.2 Shipping
All fittings and flanges shall be shipped with end protection and packaging to prevent damage
during handling and shipping.
9 Ordering
9.1 General
9.1.1
The datasheet in Appendix A shall be completed and appended to the appropriate purchase
requisitions and orders.
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Appendix A
Product Ordering Requirements
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A.1 Steel Fittings
Steel fittings to the following standards:
CSA Z245.11
MSS-SP-97
ASME B16.9
Company drawing
MSS SP-75
Table A.1 – Steel Fittings Ordering Requirements
Steel Fittings Specifications
AFE number:
Vendor:
Serial number:
Vendor dwg. number:
Quantity:
Company dwg. number:
Description:
Size:
NPS
SMYS
ksi
Material specification:
Cat. I
Cat. ll
Notch toughness
category (Canada)
MPa
Special requirements:
Note: for fittings intended to be attached to piping with unequal wall thickness and/or SMYS, the welding
end shall comply with the requirements of the applicable industry standard.
Matching Pipe Specifications
OD x WT:
in.
Material specification,
grade
Grade:
Design pressure:
mm
OD x
ksi
MPa
psi
kPa
°F
°C
in.
mm WT
Design factor:
(FxLxJxT), Z662 (CAN),
(Fx E), B31.4 (US)
Minimum design
temperature
Charpy V-notch
Canada
Drop weight tear
Category ll
Category lll Test temperature:
°F
°C
Test temperature:
°F
°C
US
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A.2 Steel Flanges
Steel flanges to the following standards:
CSA Z245.12
Company drawing
ASME B16.5
ASME B16.47, Series A
MSS SP-44
Table A.2 – Steel Flange Ordering Requirements
Steel Flange Specifications
AFE number:
Vendor:
Serial number:
Vendor dwg. number:
Quantity:
Company dwg. number:
Description:
Size:
NPS
SMYS
ksi
Material specification:
Cat. I
Cat. ll
Notch toughness
category (Canada)
MPa
Additional testing requirements:
Special requirements:
Note: for weld neck flanges intended to be attached to piping with unequal wall thickness and/or SMYS,
the welding end hub shall comply with the requirements of the applicable industry standard.
Matching Pipe Specifications
OD x WT:
in.
Material specification,
grade
Grade:
Design pressure:
mm
OD x
ksi
MPa
psi
kPa
°F
°C
in.
mm WT
Design factor:
(FxLxJxT), Z662 (CAN),
(Fx E), B31.4 (US)
Minimum design
temperature
Charpy V-notch
Canada
Drop weight tear
Category ll
Category lll Test temperature:
°F
°C
Test temperature:
°F
°C
US
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