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ASTM

ASTM A420/A420M-07

(Specification)

Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service

Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service

ABSTRACT
This specification covers wrought carbon steel and alloy steel pipe fittings of seamless and welded construction for use in pressure piping and pressure vessel service at low temperatures. Materials shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler metal added, and shall be produced by open-hearth, basic-oxygen, or electric-furnace process. Forging or forming operations shall be performed by one or a combination of two or more of the following procedures: hammering, pressing, piercing, extruding, upsetting, working, bending, fusion-welding, or machining. All welding shall be completed prior to the austenitizing heat treatment, which shall be executed in the normalized, normalized and tempered, annealed, or quenched and tempered conditions. Steel specimens shall conform to required values of chemical composition, tensile strength, yield strength, elongation, wall thickness, and Charpy V-notch impact value. All fusion-welded butt joints shall undergo radiographic examination, while hydrostatic testing of fittings is not required in this specification. Repair welding shall be permissible for parts made to dimensional standards.
SCOPE
1.1 This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction, covered by the latest revision of ASME B16.9, ASME B16.11, MSS-SP-79, MSS-SP-83, and MSS-SP-95. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A 960/A 960M. These fittings are for use in pressure piping and pressure vessel service at low temperatures.
1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When desired, one or more of these supplementary requirements shall be specified in the order.
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.

General Information

Status
Historical
Publication Date
28-Feb-2007
ICS
23.040.40 - Metal fittings
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.22 - Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications
Current Stage
Ref Project

Relations

Replaces
ASTM A420/A420M-06 - Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
Effective Date
01-Mar-2007
Replaced By
ASTM A420/A420M-10 - Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
Effective Date
01-May-2010
Referred By
ASTM A960/A960M-23 - Standard Specification for Common Requirements for Wrought Steel Piping Fittings
Effective Date
01-Mar-2007

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ASTM A420/A420M-07 - Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature ServiceASTM A420/A420M-07 - Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
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ASTM A420/A420M-07 - Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A420/A420M – 07
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Low-Temperature Service
This standard is issued under the fixed designationA420/A420M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* A960/A960M Specification for Common Requirements for
2 Wrought Steel Piping Fittings
1.1 This specification covers wrought carbon steel and
2.3 ASME Standards:
alloy steel fittings of seamless and welded construction, cov-
4
B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings
ered by the latest revision of ASME B 16.9, ASME B 16.11,
4
B 16.11 Forged Steel Fittings, Socket-Welding Threaded
MSS-SP-79, MSS-SP-83, and MSS-SP-95. Fittings differing
4
Section VIII Division 1, Pressure Vessels
from these ASME and MSS standards shall be furnished in
Section IX Welding Qualifications
accordance with Supplementary Requirement S58 of Specifi-
2.4 MSS Standards:
cation A960/A960M. These fittings are for use in pressure
MSS-SP-25 Standard Marking System for Valves, Fittings,
piping and pressure vessel service at low temperatures.
5
Flanges, and Unions
1.2 Optional supplementary requirements are provided for
5
MSS-SP-79 Socket Welding Reducer Inserts
fittings where a greater degree of examination is desired.When
MSS-SP-83 Steel Pipe Unions, Socket-Welding and
desired,oneormoreofthesesupplementaryrequirementsshall
5
Threaded
be specified in the order.
5
MSS-SP-95 Swage(d) Nipples and Bull Plugs
1.3 This specification is expressed in both inch-pound units
2.5 ASNT Standards:
and in SI units. However, unless the order specifies the
SNT-TC-1A Recommended Practice for Nondestructive
applicable “M” specification designation (SI units), the mate-
6
Testing Personnel Qualification and Certification
rial shall be furnished to inch-pound units.
1.4 The values stated in either inch-pound units or SI units
3. Ordering Information
are to be regarded separately as standard. Within the text, the
3.1 See Specification A960/A960M.
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must
4. General Requirements
be used independently of the other.
4.1 Product furnished to this specification shall conform to
2. Referenced Documents the requirements of SpecificationA960/A960M, including any
supplementary requirements that are indicated in the purchase
2.1 In addition to those Referenced Documents listed in
order. Failure to comply with the general requirements of
Specification A960/A960M, the following list of standards
Specification A960/A960M constitutes non-conformance with
apply to this specification.
3 this specification. In case of conflict between the requirements
2.2 ASTM Standards:
of this specification and Specification A960/A960M, this
A370 Test Methods and Definitions for Mechanical Testing
specification shall prevail.
of Steel Products
5. Material
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
5.1 The material for fittings shall consist of forgings, bars,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
plates, seamless or fusion welded tubular products with filler
A01.22 on Steel Forgings and Wrought Fittings for PipingApplications and Bolting
metal added. It shall conform to the chemical requirements in
Materials for Piping and Special Purpose Applications.
Table 1, and be made by one of the following processes:
Current edition approved March 1, 2007. Published April 2007. Originally
approved in 1958. Last previous edition approved in 2006 as A420/A420M – 06.
DOI: 10.1520/A0420_A0420M-07.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available from American Society of Mechanical Engineers (ASME), ASME
cation SA-420 in Section II of that Code. International Headquarters, Three Park Ave., New York, NY 10016-5990.
3 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602.
6
Standards volume information, refer to the standard’s Document Summary page on AvailablefromAmericanSocietyforNondestructiveTesting(ASNT),P.O.Box
the ASTM website. 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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Standard Specification for Common Requirements for Wrought Steel Piping Fittings

ABSTRACT
This specification covers the common requirements that shall apply to wrought steel piping fittings. The material shall consist of forgings, bars, plates, and seamless or welded tubular products. Ferritic steels shall be fully killed. Hollow cylindrically shaped parts up to and including NPS 4 may be machined from bar or seamless tubular material. Elbows, return bends, tees, and header tees shall not be machined directly from bar stock. The following procedures shall be done for heat treatment: full annealing, solution annealing, isothermal annealing, normalizing, tempering and post-weld heat treatment, stress relieving, and quench and temper. Chemical analysis, heat analysis, and product analysis shall also be done. The chemical requirements shall conform to the required compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, columbium, titanium, aluminum, lead, and copper. The following tests shall be done for the mechanical requirements: tension, hardness, impact, and hydrostatic tests.
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Title of Specification  
ASTM
Designation  
Specification for Piping Fittings of Wrought
Carbon Steel and Alloy Steel for Moderate and
High Temperature Service  
A234/A234M    
Specification for Wrought Austenitic Stainless
Steel Piping Fittings  
A403/A403M    
Specification for Piping Fittings of Wrought Carbon
Steel and Alloy Steel for Low-Temperature Service  
A420/A420M    
Specification for Wrought-Carbon Steel Butt-Welding
Piping Fittings with Improved Notch Toughness  
A758/A758M    
Specification for As-Welded Wrought Austenitic
Stainless Steel Fittings for General Corrosive
Service at Low and Moderate Temperatures  
A774/A774M    
Specification for Wrought Ferritic, Ferritic/Austenitic,
and Martensitic Stainless Steel Piping Fittings  
A815/A815M    
Specification for Heat-Treated Carbon Steel
Fittings for Low-Temperature and Corrosive Service  
A858/A858M    
Specification for Wrought High-Strength
Ferritic Steel Butt-Welding Fittings  
A860/A860M  
1.2 In case of conflict between a requirement of the individual product specification and a requirement of this general requirement specification, the requirements of the individual product specification shall prevail over those of this specification.  
1.3 By mutual agreement between the purchaser and the supplier, additional requirements may be specified (See 4.1.8). The acceptance of any such additional requirements shall be dependent on negotiations with the supplier and must be included in the order as agreed upon by the purchaser and supplier.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text and the tables, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. The inch-pound units shall apply unless the “M” designation [SI] of the product specification is specified in the order.  
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ASTM A815/A815M-23(Specification)
Standard Specification for Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings

ABSTRACT
This specification covers two general classes, WP and CR, of wrought ferritic, ferritic/austenitic, and martensitic stainless steel fittings of seamless and welded construction. Class WP fittings are subdivided into four subclasses: Classes WP-S, WP-W, WP-WX, and WP-WU. The material for fittings shall consist of forgings, bars, plates, or seamless or welded tubular products. The steel shall be melted by electric furnace, vacuum furnace, or electric furnace followed by vacuum or electroslag-consumable remelting. Forging or shaping operations shall be performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining or by combination of two or more of these operations. The materials shall undergo heat treatment and shall follow the required cooling process and tempering temperature. Chemical and product analyses shall be performed and shall conform to the required chemical composition in carbon, manganese, phosphorus, silicon, sulfur, nickel, chromium, molybdenum, copper, nitrogen, and titanium. The mechanical properties of the fitting material shall conform to the required values in yield strength, tensile strength, elongation, and hardness.
SCOPE
1.1 This specification covers two general classes, WP and CR, of wrought ferritic, ferritic/austenitic, and martensitic stainless steel fittings of seamless and welded construction covered by the latest revision of Specification A960/A960M. Fittings differing from these standards may be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M.  
1.1.1 Class WP fittings are subdivided into four subclasses: Classes WP-S, WP-W, WP-WX, and WP-WU. They are manufactured to the requirements of Specification A960/A960M, and they shall have pressure ratings compatible with 13.2. Class WP-S fittings are those manufactured from seamless product by a seamless method of manufacture (marked with class symbol WP-S); Class WP-W fittings are those which contain welds where the fitting fabrication or construction welds have been radiographed (marked with class symbol WP-W); and Class WP-WX fittings are those which contain welds where all welds have been radiographed (marked with class symbol WP-WX); and Class WP-WU fittings are those which contain welds where all welds have been ultrasonically tested (marked with class symbol WP-WU).  
1.1.2 Class CR fittings are those manufactured to the requirements of MSS SP-43, and they shall have pressure ratings compatible with 13.3.  
1.2 This specification does not apply to cast fittings.  
1.3 Optional supplementary requirements are provided. When desired, one or more of these may be specified in the order.  
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation [SI units], the material shall be furnished to inch-pound units.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM A420/A420M-22(Specification)
Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service

ABSTRACT
This specification covers wrought carbon steel and alloy steel pipe fittings of seamless and welded construction for use in pressure piping and pressure vessel service at low temperatures. Materials shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler metal added, and shall be produced by open-hearth, basic-oxygen, or electric-furnace process. Forging or forming operations shall be performed by one or a combination of two or more of the following procedures: hammering, pressing, piercing, extruding, upsetting, working, bending, fusion-welding, or machining. All welding shall be completed prior to the austenitizing heat treatment, which shall be executed in the normalized, normalized and tempered, annealed, or quenched and tempered conditions. Steel specimens shall conform to required values of chemical composition, tensile strength, yield strength, elongation, wall thickness, and Charpy V-notch impact value. All fusion-welded butt joints shall undergo radiographic examination, while hydrostatic testing of fittings is not required in this specification. Repair welding shall be permissible for parts made to dimensional standards.
SCOPE
1.1 This specification2 covers wrought carbon steel and alloy steel fittings of seamless and welded construction, covered by the latest revision of ASME B16.9, ASME B16.11, MSS SP-79, MSS SP-83, MSS SP-95, and MSS SP-97. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M. These fittings are for use in pressure piping and pressure vessel service at low temperatures.  
1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When desired, one or more of these supplementary requirements shall be specified in the order.  
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM A787/A787M-22(Specification)
Standard Specification for Electric-Resistance-Welded Metallic-Coated Carbon Steel Mechanical Tubing

ABSTRACT
This guide covers standard specification for round, square, rectangular, and special shape, electric-resistance-welded mechanical tubing, either zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-coated (galvannealed), or aluminum-zinc alloy-coated steel sheet. Low-carbon steels and other carbon steels shall conform to the required chemical composition for carbon, manganese, phosphorus, and sulfur. The steels shall conform to elemental tolerances for product analysis. Wall thickness tolerances for premetallic coated as-welded tubing and diameter tolerances for metallic-coated round tubing shall be provided.
SCOPE
1.1 This specification covers round, square, rectangular, and special shape, electric-resistance-welded carbon steel mechanical tubing, either zinc-coated (galvanized) after welding or produced from aluminum-coated, zinc-coated (galvanized), zinc-iron alloy-coated (galvannealed), 55 % aluminum-zinc alloy-coated, or zinc-aluminum-magnesium alloy-coated carbon steel sheet. Tubing for use as electrical conduit (EMT) or intermediate metallic conduit (IMC) is not covered by this specification.  
1.1.1 The product is available in various grades based on chemical requirements (Sections 5 and 9).  
1.1.2 The product is available in various Types (Section 3).  
1.2 This specification covers mechanical tubing with outside diameters or maximum outside dimensions ranging from 1/2 to 15 in. [12.7 to 380.0 mm] and wall thickness from 0.028 to 0.180 in. [0.70 to 4.60 mm]. Indeterminate wall thicknesses may be ordered. In those cases the more stringent tolerances of Tables 3, 4, 5, 6, 12 and 13 shall apply.  
1.3 When sizes within the ranges listed above are ordered, all other requirements of the specification shall be met.  
1.4 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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