T CHNICAL SPECIFICATION
CARBON AND ALLOY STEEL FITTIN S (AMENDMEN S/SUPPLEMENTS TO ASTM A 234)
MESC SPE 76/200 February 2016
ESC SPECIFICATION DOCUMENT
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MESC SPE 76/200 February 2016 Page 2 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 Contractors/subcontrac tors and Manufacturers/Suppliers 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 MESC SPE, combination of MESC SPEs or any part thereof, even if it is wholly or partly caused by negligence on the part of Shell GSI or other Shell Service Company. The benefit of this disclaimer shall inure in all respects to Shell GSI and/or any Shell Service Company, or companies affiliated to these companies, that may issue MESC SPEs or require the use of 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 whomsoever and the MESC SPEs 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 MESC SPEs vests in Shell GSI. Users shall arrange for MESC SPEs 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 MESC SPE Administrator in Shell GSI.
MESC SPE 76/200 February 2016 Page 3 TABLE OF CONTENTS PART I 1.1 1.2 1.3 1.4 1.5
INTRODUCTION .......................................................................... ........................................................................................................ .............................. 4 SCOPE................................................................. ........................................................................................................................ .......................................................4 DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS ......... 4 DEFINITIONS ................................................................... ............................................................................................................. .......................................... 4 CHANGES SINCE PREVIOUS EDITION ...................................................................4 COMMENTS ON THIS MESC SPE ....................................................................... ............................................................................ ..... 5
PART II
AMENDMENTS/SUPPLEMENTS TO ASTM A 234:2015 234: 2015 .......................................... 6
PART III
REFERENCES ................................................................. ......................................................................................................... ........................................11
MESC SPE 76/200 February 2016 Page 4 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 234:2015 234: 2015,, which are covered in Part II of this MESC SPE. The clause numbering of ASTM A 234: 2015 has been retained and any amendments are identified as ‘Add ‘Add ’, ’, ‘Modify ‘ Modify to read ’ or ‘Delete ‘Delete ’. ’. Any clauses of ASTM A 234: 2015 that are not amended or supplemented by this MESC SPE, shall apply as written.
1.2
DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS Unless otherwise authorised by Shell GSI, the distribution of this MESC SPE is confined to Shell companies and, where necessary, to Contractors and Manufacturers/Suppliers nominated by them. This MESC SPE is intended for use in oil refineries, chemical plants, gas plants, exploration and production facilities and, where applicable, supply/distribution installations. If national and/or local regulations exist in which some of the requirements may be more stringent than in this MESC SPE 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 safety, environmental, economic and legal aspects. In all cases the Contractor shall inform the Principal of any deviation from the requirements of this MESC SPE 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 MESC SPE as closely as possible.
1.3
DEFINITIONS Contractor is the party that carries out all or part of the design, engineering, The Contractor 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 Manufacturer/Supplier is the party that manufactures or supplies equipment and services to perform the duties specified by the Contractor. Principal is the party that initiates the project and ultimately pays for its design and The Principal 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 shall indicates a requirement. The word should indicates should indicates a recommendation.
1.4
CHANGES SINCE PREVIOUS EDITION The previous edition of this MESC SPE was dated January January 2016. The change is to update reference to the latest version of ASTM A234, to update the requirements for impact testing, to delete the requirement mentioned in ASTM A234 section 7.4, 7.5, updated J factor, clarified that requirement in section 8.1 of this document is in addition to requirement in ASTM A234 and deleted hot yield test.
MESC SPE 76/200 February 2016 Page 5 1.5
COMMENTS ON THIS MESC SPE Comments on this MESC SPE may be sent to the MESC SPE Administrator at
[email protected].. Shell staff may also post comments on this MESC SPE on the Surface
[email protected] Global Network (SGN) under the Standards folder.
MESC SPE 76/200 February 2016 Page 6 PART II AMENDMENTS/SUPPLEMENTS TO ASTM A 234:2015 234:2015 6.8 6.8 7.2
Add
If galvanising is specified, galvanising shall be in accordance with ASTM A 153, Grade B. 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 heatin g to a uniform un iform temperature tempera ture not n ot less than 815 81 5 °C (1500 (150 0 °F), followed fo llowed 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 9 945 45 °C (1550 °F to 1735 1 735 °F), fol f ol lowed by b y cooling coolin g in an atmosphere-controlled furnace or cooling in still air.
7.3
Modify to read: Fittings furnished to Grades WP5, WP9, WP11 or WP22 (except where steam service is designated in the MESC specification), 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 tempe ring temperature tempe rature shall be 740° 7 40°C±8°C (1365° (13 65° 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 min imum tem pering tempera te mperature ture shall sha ll be 720° 720 °C (1 330°F). After all processing, one sample from each heat shall undergo three simulated simul ated PWHT PW HT cycles cycle s at 730°C ±5°C (1345° (134 5°F ± 10°F) with a holding holdin g time tim e 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 condit con dition ion.. The temp t emperi ering ng tempe te mperat rature ure shall s hall be b e 740° 740 °C ±8°C (1365° (13 65°F±14° F±14 °F). The fittings shall be furnished in the post weld heat treated condition. The post weld we ld heat treatment treatm ent tempera te mperature ture shall sh all be 715 7 15 °C °C ±10°C (1318 °F±18°F). The tensile te nsile propertie pro perties s shall be in accord acc ord ance with Class Cl ass 2 of ASTM A 387.
2.
The plate to ASTM A 387 shall be supplied in the normalised and tempered condition. condit ion. The T he minimum min imum temper t empering ing temperatu tem perature re shall sha ll be 720° 72 0°C (1330° (133 0°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 treatme tr eatment nt temperature tempe rature shall sha ll be 715 °C ±10°C (1318 °F±18 ±1 8°F). After all processing, one sample from each heat shall undergo three simulated simul ated PWHT PW HT cycles cycle s at 730°C ±5°C (1345° (134 5°F ± 10°F) with a holding holdin g time tim e 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.
MESC SPE 76/200 February 2016 Page 7 7.4
Delete
7.5
Delete
8.1
Add For fittings furnished to Grades WPB or WPBW, the following shall apply: -
The carbon content shall not exceed 0.23 %.
-
Supplementary requirement S3 shall apply, although CE shall not exceed 0.43.
-
The ratio of ‘Mn/C’ (manganese content/carbon content) shall be minimum ‘5’ unless ‘5’ unless toughness properties are meeting in accordance with section 21 of this MESC SPE.
For fittings furnished to Grade WP11 or WP11W, the following shall apply: -
The material shall meet the following additional chemical requirements by heat analysis: Element Max allowed
C 0.15%
P 0.012 wt%
S 0.007 wt%
Cu 0.20%
Ni 0.30%
X-bar 14 ppm
X-bar shall be calculated with the following formula: X - bar
10P =
+
5Sb
+
4Sn
100
+
As
, with P, Sb, Sn and As values in ppm.
Except where steam service is designated in the MESC specification, for fittings furnished to Grades WP22 or WP22W, the following shall apply: -
The phosphorous content shall not exceed 0.010 %.
-
The sulphur content shall not exceed 0.010 %.
For fittings furnished to Grade WP22 in steam service, the following shall apply: -
8.6
Add
J-factor = (Si+Mn) x (P+Sn) x 1000 < 180
If sour service is specified for fittings furnished to Grade WPB, the sulphur content shall not exceed 0.010 %. If sour service is specified for fittings furnished to Grade WPBW, the following requirements shall apply: -
In order to ensure effective resistance against both Hydrogen Induced Cracking (HIC) and Sulphide Stress Corrosion (SSC), the chemical composition shall be as per Table 3, unless ASTM A 516 Grade 65 is more restrictive.
-
Supplementary requirement S54.2 and S54.3 of ASTM A 516 shall apply, although CE shall not exceed 0.43, irrespective of the specified wall thickness.
-
The micro-alloying elements Boron Boron (B), Titanium (Ti), Niobium (Nb) and Vanadium (V) shall not be intentionally added to the steel, unless approved by the Principal.
-
The plate plate shall be be vacuum-treated, vacuum-treated, fully deoxidised, desulphurised and dephosphorised. The manufacturing / rolling process shall result in a homogeneous microstructure with no significant ferrite / perlite banding.
-
For plate plate with with sulphur content of 0.001 0.001 % and higher, calcium treatment shall be applied for inclusion shape control. The calcium content shall not exceed 3 times the sulphur content.
MESC SPE 76/200 February 2016 Page 8 Table 3
Add
Table 3 – Chemical composition for sour service Single elements
Identification
Maximum wt. %
Carbon
C
0.20
Manganese
Mn
1.30
Phosphorous
P
0.01
Sulphur
S
0.002
Silicon
Si
0.40
Copper
Cu
0.40
Nickel
Ni
0.40
Chromium
Cr
0.30
Molybdenum
Mo
0.12
Vanadium
V
0.015
Niobium
Nb
0.015
Titanium
Ti
0.02
Boron
B
0.0005
Combined elements
Cr + Mo
0.30
Ni + Cu + Cr + Mo
0.72
V + Nb
0.02
The manganese content shall be minimum 1% unless toughness properties are meeting in accordance with section 21 of this MESC SPE.
8.7
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.
12.2
Add
Where steam service is designated in the MESC specification, fittings furnished from Grade WP22 shall be Magnetic particle examined as per supplementary requirement S55 of ASTM A 961. Acceptance criteria shall be in accordance with ASME VIII, Division 1, Appendix 6.
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:
15.4
Add
-
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).
For fittings furnished to Grades WPBW and specified for sour service and
MESC SPE 76/200 February 2016 Page 9 manufactured from plate material, the following requirements shall apply: -
The plate shall be checked for laminations by ultrasonic examination in in accordance with EN 10160 with acceptance levels S1 and E4.
-
The plate plate material shall be HIC tested in accordance with MESC SPE 74/125 after a simulation of the final heat treatment of the fitting.
19.3
Add
If sour service is specified, the word “SOUR” shall be marked on the pipe directly behind the ASTM designation.
21
Add
Impact testing For fittings furnished to Grades WPB or WPBW, the following shall apply: Unless the ratio of ‘Mn/C’ (manganese content/carbon content) is more than ‘5’,, impact testing is required in accordance with the following: ‘5’ -
Charpy impact tests shall be carried out in accordance with with ASTM ASTM A 370 at a temperature given in Table-3.
-
A set of three transverse Charpy test pieces shall be taken from the base material from one pipe representing each heat. Test pieces shall be located at the mid thickness.
-
The notch of all Charpy pieces shall be perpendicular to the pipe surface.
-
Sub-size samples can only be be applied, if standard 10 mm x 10 mm (0.39 in x 0.39 in) samples are not possible. The acceptance criteria shall be in accordance with Table 4.
-
Where steam service is designated in the MESC specification, fittings furnished from Grade WP22 shall be Charpy impact tested as follows:
Table 3
-
Charpy impact tests shall be carried out in accordance with ASTM A 370 at a temperature tempe rature of +20 +2 0 °C (+68 °F) on longitudina longit udinall samp les.
-
Impact test results as an average of three tests shall be at least 27 J for standard size specimens (10 mm x 10 mm). Only one result may be lower than 27 J, but it shall be at least 21 J.
Add
Table-3 Selection of impact test temperature Pipe wall thickness (t) mm t
≤
19.1
19.1 < t ≤ 50.8 50.8 < t
Table 4
Add
≥
76.2
Impact test temperature
In
°C
°F
t ≤ 0.75
minus 29
minus 20
minus 10
15
17
62
0.75 < t 2< t
≤ 2
≤ 3
Table 4 – Acceptance criteria for Charpy impact testing Size of specimen
Minimum average notched
Minimum notched bar
mm x mm
bar impact value of
impact value of one
each set of three
specimen only of
specimens
a set
J
ft-lbf
J
ft-lbf
10 x 10
27
19.5
21
15
10 x 7.5
21
15
16.5
12
MESC SPE 76/200 February 2016 Page 10 10 x 6.67
18
13.5
13.5
10.5
10 x 5
13.5
10.5
10.5
7.5
10 x 3.33
10.5
7.5
6
4.5
10 x 2.5
7.5
6
6
4.5
MESC SPE 76/200 February 2016 Page 11 PART III
REFERENCES
In this MESC SPE, reference is made to the following publications: NOTES: 1. Unless specifically designated designated by date, the latest edition of each publication shall be used, together with any amendments/supplements/revisions amendments/supplements/revisions thereto. 2. Most of the referenced external standards are available to Shell staff on the SWW (Shell Wide Web) at http://sww05.europe.shell.com/standards.. http://sww05.europe.shell.com/standards
SHELL STANDARDS Hydrogen Induced Cracking sensitivity test
MESC SPE 74/125
Fittings to ASME B16.9
MESC SPE 76/110
AMERICAN STANDARDS Factory-Made Wrought Buttwelding Fittings
ASME B16.9
Process Piping
ASME B31.3
ASME Boiler and Pressure Vessel Code
ASME VIII, Division 1
Issued by: American Society of Mechnical Engineers ASME International Three Park Avenue, M/S 10E New York, NY 10016, USA
Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
ASTM A 153
Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
ASTM A 234:2015 234:2015
Standard Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM A370
Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium- Molybdenum
ASTM A 387
Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service
ASTM A 516
Standard Specification for Common Requirements for Wrought Steel Piping Fittings
ASTM A 960
Issued by: American Society for Testing and Materials 1916 Race Street, Philadelphia 19103, USA
EUROPEAN STANDARDS Ultrasonic Testing of Steel Flat Product of Thickness Equal or Greater Than 6 mm (Reflection Method) Issued by: Commité Européen de Normalisation Secrétariat Central Rue de Stassart 36 B-1050 Brussels Belgium Copies can also be obtained from national standards
EN 10160
