Carbon and Alloy Steel Fittings (Amendments/Supplements To Astm A 234)
Carbon and Alloy Steel Fittings (Amendments/Supplements To Astm A 234)
Carbon and Alloy Steel Fittings (Amendments/Supplements To Astm A 234)
June 2013
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MESC SPE 76/200
June 2013
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PREFACE
MESC (Materials and Equipment Standards and Code) SPE documents reflect the views, at the time of publication, of:
Shell Global Solutions International B.V. (Shell GSI)
and/or
Shell International Exploration and Production B.V. (SIEP)
and/or
other Shell Service Companies.
They are based on the experience acquired during their involvement with the design, construction, operation and
maintenance of processing units and facilities, and they are supplemented with the experience of Shell Operating Units.
Where appropriate they are based on, or reference is made to, international, regional, national and industry standards.
The objective is to set the recommended standard for good design and engineering practice applied by Shell companies
operating an oil refinery, gas handling installation, chemical plant, oil and gas production facility, or any other such
facility, and thereby to 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 MESC SPEs may not cover every requirement or diversity of condition
at each locality. The system of MESC SPEs is expected to be sufficiently flexible to allow individual Operating Units to
adapt the information set forth in MESC SPEs to their own environment and requirements.
When Contractors or Manufacturers/Suppliers use MESC SPEs they shall be solely responsible for the quality of work
and the attainment of the required design and engineering standards. In particular, for those requirements not
specifically covered, the Principal will expect them to follow those practices, which will achieve the same level of
integrity as reflected in the MESC SPEs. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting
from his own responsibility, consult the Principal or its technical advisor.
The right to use MESC SPEs is granted by Shell GSI, in most cases under Service Agreements primarily with Shell
companies and other companies receiving technical advice and services from Shell GSI or another Shell Service
Company. Consequently, three categories of users of MESC SPEs can be distinguished:
1) Operating Units having a Service Agreement with Shell GSI or other Shell Service Company. The use of MESC
SPEs by these Operating Units is subject in all respects to the terms and conditions of the relevant Service
Agreement.
2) Other parties who are authorized to use MESC SPEs 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
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MESC SPEs.
Without prejudice to any specific terms in respect of confidentiality under relevant contractual arrangements, MESC
SPEs shall not, without the prior written consent of Shell GSI, be disclosed by users to any company or person
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users implement this requirement.
All administrative queries should be directed to the MESC SPE Administrator in Shell GSI.
MESC SPE 76/200
June 2013
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TABLE OF CONTENTS
PART I INTRODUCTION ........................................................................................................ 4
1.1 SCOPE........................................................................................................................ 4
1.2 DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS ......... 4
1.3 DEFINITIONS ............................................................................................................. 4
1.4 CHANGES SINCE PREVIOUS EDITION ................................................................... 4
1.5 COMMENTS ON THIS MESC SPE ............................................................................ 5
PART II AMENDMENTS/SUPPLEMENTS TO ASTM A 234:2011 .......................................... 6
PART III REFERENCES ........................................................................................................... 9
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PART I INTRODUCTION
1.1 SCOPE
This MESC SPE specifies requirements for carbon and alloy steel fittings.
This specification shall apply in addition to the applicable MESC Buying Description,
purchase order or requisition sheet.
This specification only applies to carbon and alloy steel fittings to ASTM A 234, Grades
WPB/WPBW, WP1/WP1W (0.5Mo), WP5/WP5W (5Cr-0.5Mo), WP9/WP9W (9Cr-1Mo),
WP11/WP11W Class 2 (1.25Cr-0.5Mo) and WP22/WP22W Class 3 (2.25Cr-1Mo).
This specification is written as amendments and supplements to ASTM A 234:2011, which
are covered in Part II of this MESC SPE. The clause numbering of ASTM A 234: 2011 has
been retained and any amendments are identified as ‘Add’, ‘Modify to read’ or ‘Delete’. Any
clauses of ASTM A 234: 2011 that are not amended or supplemented by this MESC SPE,
shall apply as written.
1.3 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 or
maintenance 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 its design and
construction. The Principal will generally specify the technical requirements. 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 word should indicates a recommendation.
6.7 Add If galvanising is specified, galvanising shall be in accordance with ASTM A 153,
Grade B.
7.2 Modify to read:
Fittings furnished to Grades WPB or WPBW, when forged or extruded from welded
pipe, shall be supplied in the normalised or hot finished condition.
Fittings furnished to Grades WPBW, furnished from plate, shall be supplied in the
stress relieved or normalised condition. The plate material shall be supplied in the
normalised condition. If sour service is specified, normalising shall consist of
heating to a uniform temperature not less than 815 °C (1500 °F), followed by
cooling in still air or in the cooling chamber of an atmosphere-controlled furnace.
Fittings furnished to Grade WPB, supplied in the hot finished condition, shall be
provided with a certificate that hot finishing was executed within a temperature
range of 845 °C to 945 °C (1550 °F to 1735 °F), followed by cooling in an
atmosphere-controlled furnace or cooling in still air.
7.3 Modify to read:
Fittings furnished to Grades WP5, WP9, WP11 or WP22, and fittings forged or
extruded from welded pipe to Grades WP5W, WP9W, WP11W or WP22W shall
conform to one of the following two options:
1. The fittings shall be supplied in the normalised and tempered condition.
The tempering temperature shall be 740°C±8°C (1365°F±14°F). The tensile
properties shall be in accordance with Class 1 of ASTM A 387.
2. The fittings shall be supplied in the normalised and tempered condition.
The minimum tempering temperature shall be 720°C (1330°F).
After all processing, one sample from each heat shall undergo three
simulated PWHT cycles at 730°C ±5°C (1345°F ± 10°F) with a holding time
as per ASME B31.3 Table 331.1.1 for each cycle. Tensile tests according
to ASTM A335 shall be performed after each cycle. If results from all tests
are conform ASTM A335, all fittings from that heat are accepted.
Fittings manufactured from plate to Grades WP5W, WP9W, WP11W or WP22W
shall conform to one of the following two options:
1. The plate to ASTM A 387 shall be supplied in the normalised and tempered
condition. The tempering temperature shall be 740°C±8°C (1365°F±14°F).
The fittings shall be furnished in the post weld heat treated condition. The
post weld heat treatment temperature shall be 715 °C ±10°C (1318
°F±18°F). The tensile properties shall be in accordance with Class 2 of
ASTM A 387.
2. The plate to ASTM A 387 shall be supplied in the normalised and tempered
condition. The minimum tempering temperature shall be 720°C (1330°F).
The tensile properties shall be in accordance with Class 2 of ASTM A 387.
The fittings shall be furnished in the post weld heat treated condition. The
post weld heat treatment temperature shall be 715 °C ±10°C (1318
°F±18°F).
After all processing, one sample from each heat shall undergo three
simulated PWHT cycles at 730°C ±5°C (1345°F ± 10°F) with a holding time
as per ASME B31.3 Table 331.1.1 for each cycle. Mechanical tests
according to ASTM A691 paragraph 8.1 shall be performed after each
cycle. If all results meet ASTM A691 requirements, all pipes from that heat
are accepted.
8.1 For fittings furnished to Grades WPB or WPBW, the following shall apply:
- The carbon content shall not exceed 0.23 %.
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8.6 Add If sour service is specified, the weld metal deposit shall not contain more than
1.00 % Nickel.
9.5 Add Fittings furnished to Grades WPBW, WP1W, WP5W, WP9W, WP11W and WP22W,
shall be furnished from same grade of plate or welded pipe as shown in the buying
description.
10.2 Add:
Hardness testing shall be carried out on welded fittings at a frequency of one fitting
out of every ten per heat. Testing shall be carried out after post-weld heat
treatment. No part of the weld, heat affected zone or base metal shall exceed
248 HV 10.
15.3 Add For fittings furnished to Grades WPBW and specified for sour service, and for
fittings furnished to Grades WP1W, WP5W, WP9W, WP11W or WP22W, the
following requirements shall apply:
- Magnetic Particle examination shall be carried out in accordance with ASTM
A 960, supplementary requirement S69. The wet method shall be used.
- The acceptance criteria for welds shall be in accordance with ASME B31.3,
Table 341.3.2 for Severe Cyclic Conditions, Criteria A. For other surfaces and
for butt-welding end preparations, there shall be no linear indications longer
than 1.6 mm (0.063 in).
15.4 Add For fittings furnished to Grades WPBW and specified for sour service and
manufactured from plate material, the following requirements shall apply:
- The plate shall be checked for laminations by ultrasonic examination in
accordance with EN 10160 with acceptance levels S1 and E4.
- The plate material shall be HIC tested in accordance with MESC SPE 74/125
after a simulation of the final heat treatment of the fitting.
19.6 Add If sour service is specified, the word “SOUR” shall be marked on the pipe directly
behind the ASTM designation.
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SHELL STANDARDS
Hydrogen Induced Cracking sensitivity test MESC SPE 74/125
EUROPEAN STANDARDS
Ultrasonic Testing of Steel Flat Product of Thickness EN 10160
Equal or Greater Than 6 mm (Reflection Method)
Issued by:
Commité Européen de Normalisation
Secrétariat Central
Rue de Stassart 36
B-1050 Brussels
Belgium