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1.1 This specification covers relatively thin-walled forgings (including gas bottles) for pressure vessel use. Three types of carbon steel and six types of alloy steel are included. Provision is made for integrally forging the ends of vessel bodies made from seamless pipe or tubing.
Note 1—When working to the chemical and tensile requirements of this specification, the influence of wall thickness and cooling rate will necessarily eliminate certain forging sizes in each class.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A275/A275M Practice for Magnetic Particle Examination of Steel Forgings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A388/A388M Practice for Ultrasonic Examination of Steel Forgings
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A788/A788M Specification for Steel Forgings, General Requirements
E112 Test Methods for Determining Average Grain Size
E165 Practice for Liquid Penetrant Examination for General Industry
E290 Test Methods for Bend Testing of Material for Ductility
E433 Reference Photographs for Liquid Penetrant Inspection
ICS Number Code 77.140.85 (Iron and steel forgings)
UNSPSC Code 31132100(Steel forgings)