ASTM A961/A961M-04a
(Specification)Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications
Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications
SCOPE
1.1 This specification covers a group of common requirements that shall apply to steel flanges, forged fittings, valves, and parts for piping applications under any of the following individual product specifications:
Title of Specification ASTM DesignationForgings, Carbon Steel, for Piping Components A105/A105MForgings, Carbon Steel, for General-Purpose Piping A181/A181MForged or Rolled Alloy-Steel Pipe Flanges, Forged A182/A182M Fittings, and Valves and Parts for High Temperature ServiceForgings, Carbon and Low Alloy Steel, Requiring Notch A350/A350MToughness Testing for Piping Components Forged or Rolled 8 and 9% Nickel AlloyA522/A522MSteel Flanges, Fittings, Valves, and Partsfor Low-Temperature ServiceForgings, Carbon and Alloy Steel, for Pipe Flanges, A694/A694MFittings, Valves, and Parts for High-Pressure Transmission Service Flanges, Forged, Carbon and Alloy Steel for Low A707/A707MTemperature Service Forgings, Carbon Steel, for Piping Components with A727/A727MInherent Notch Toughness Forgings, Titanium-Stabilized Carbon Steel, for A836/A836MGlass-Lined Piping and Pressure Vessel Service
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.
1.2 By mutual agreement between the purchaser and the supplier, additional requirements may be specified (see section 4.1.2). 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 between the purchaser and supplier.
1.3 The values stated in either inch-pound units or SI units (metric) 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 are not exact equivalents; therefore each system must be used independently of the other. Combining values from the two systems may result in nonconformance 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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Designation: A 961/A 961M – 04a
Standard Specification for
Common Requirements for Steel Flanges, Forged Fittings,
1
Valves, and Parts for Piping Applications
This standard is issued under the fixed designationA 961/A 961M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* values stated in each system are not exact equivalents; there-
fore each system must be used independently of the other.
1.1 This specification covers a group of common require-
Combining values from the two systems may result in noncon-
ments that shall apply to steel flanges, forged fittings, valves,
formance with the specification. The inch-pound units shall
and parts for piping applications under any of the following
apply, unless the “M” designation (SI) of the product specifi-
individual product specifications:
cation is specified in the order.
Title of Specification ASTM Designation
2. Referenced Documents
Forgings, Carbon Steel, for Piping Components A 105/A 105M
Forgings, Carbon Steel, for General-Purpose Piping A 181/A 181M
2
2.1 ASTM Standards:
Forged or Rolled Alloy-Steel Pipe Flanges, Forged A 182/A 182M
A 105/A 105M Specification for Carbon Steel Forgings for
Fittings, and Valves and Parts for High Temperature
Service
Piping Applications
Forgings, Carbon and Low Alloy Steel, Requiring Notch A 350/A 350M
A 181/A 181M Specification for Carbon Steel Forgings for
Toughness Testing for Piping Components
General-Purpose Piping
Forged or Rolled 8 and 9 % Nickel Alloy A 522/A 522M
Steel Flanges, Fittings, Valves, and Parts
A 182/A 182M Specification for Forged or Rolled Alloy-
for Low-Temperature Service
Steel Pipe Flanges, Forged Fittings, and Valves and Parts
Forgings, Carbon and Alloy Steel, for Pipe Flanges, A 694/A 694M
for High-Temperature Service
Fittings, Valves, and Parts for High-Pressure
Transmission Service
A 275/A 275M Test Method for Magnetic Particle Exami-
Flanges, Forged, Carbon and Alloy Steel for Low A 707/A 707M
nation of Steel Forgings
Temperature Service
A 350/A 350M Specification for Carbon and Low-Alloy
Forgings, Carbon Steel, for Piping Components with A 727/A 727M
Inherent Notch Toughness
Steel Forgings, Requiring Notch Toughness Testing for
Forgings, Titanium-Stabilized Carbon Steel, for A 836/A 836M
Piping Components
Glass-Lined Piping and Pressure Vessel Service
A 370 Test Methods and Definitions for MechanicalTesting
1.2 In case of conflict between a requirement of the indi-
of Steel Products
vidual product specification and a requirement of this general
A 522/A 522M Specification for Forged or Rolled 8 and
requirement specification, the requirements of the individual
9 % NickelAlloy Steel Flanges, Fittings,Valves, and Parts
product specification shall prevail over those of this specifica-
for Low-Temperature Service
tion.
A 694/A 694M Specification for Carbon and Alloy Steel
1.3 By mutual agreement between the purchaser and the
Forgings for Pipe Flanges, Fittings, Valves, and Parts for
supplier, additional requirements may be specified (see Section
High-Pressure Transmission Service
4.1.2). The acceptance of any such additional requirements
A 700 Practices for Packaging, Marking, and Loading
shall be dependent on negotiations with the supplier and must
Methods for Steel Products for Domestic Shipment
be included in the order as agreed upon between the purchaser
A 707/A 707M Specification for Forged Carbon and Alloy
and supplier.
Steel Flanges for Low-Temperature Service
1.4 The values stated in either inch-pound units or SI units
A 727/A 727M Specification for Carbon Steel Forgings, for
(metric) are to be regarded separately as standard. Within the
Piping Components with Inherent Notch Toughness
text and the tables, the SI units are shown in brackets. The
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
2
A01.22 on Steel Forgings andWrought Fittings for PipingApplications and Bolting For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Materials for Piping and Special Purpose Applications. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Sept. 1, 2004. Published September 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1996. Last previous edition approved in 2004 as A 961–04. the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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