A312 Stainless Steel Pipe SCH5 SCH10 SCH40 Welded Pipe SS Pipe Grade 304 316L 310S 321 347

Chemical Requirements

Permitted Variations in Wall Thickness

• Exception for welded pipe: the weld area shall not be limited by the “Over” tolerance

Permitted Variations in Outside Diameter

Heat Treatment

All pipe shall be furnished in the heat-treated condition

Heat treat temperature for 304/L and 316/L is 1900 deg F (1040 deg C) minimum and then quenched in water or rapidly cooled.

Tensile Requirements

Hydrostatic or Nondestructive Electric Test

Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used will be at the option of the manufacturer unless otherwise specified in the purchase order.

Referenced Documents

ASTM Standards

• A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
• A370 Test Methods and Definitions for Mechanical Testing of Steel Products
• A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
• A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
• E112 Test Methods for Determining Average Grain Size
• E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
• E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

ASME Standards:

• B1.20.1 Pipe Threads, General Purpose
• B36.10M Welded and Seamless Wrought Steel Pipe
• B36.19 Stainless Steel Pipe
• ASME Boiler and Pressure Vessel Code: Section VIII4

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