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 Designation
Forgings, Carbon Steel, for Piping Components	A 105/A 105M
Forgings, Carbon Steel, for General-Purpose Piping	A 181/A 181M
Forged or Rolled Alloy-Steel Pipe Flanges, Forged	A 182/A 182M
Fittings, and Valves and Parts for High Temperature Service
Forgings, Carbon and Low Alloy Steel, Requiring Notch	A 350/A 350M
Toughness Testing for Piping Components
Forged or Rolled 8 and 9 % Nickel Alloy	A 522/A 522M
Steel Flanges, Fittings, Valves, and Parts
for Low-Temperature Service
Forgings, Carbon and Alloy Steel, for Pipe Flanges,	A 694/A 694M
Fittings, Valves, and Parts for High-Pressure Transmission Service
Flanges, Forged, Carbon and Alloy Steel for Low	A 707/A 707M
Temperature Service
Forgings, Carbon Steel, for Piping Components with	A 727/A 727M
Inherent Notch Toughness
Forgings, Titanium-Stabilized Carbon Steel, for	A 836/A 836M
Glass-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.

1.3 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.

1.4 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.