1.1 Purpose
This standard identifes requirements for heat treatment supplier qualifcation, processing, identifcation and traceability, and documentation of heat treatment services for use in the petroleum and natural gas industries when referenced by an applicable equipment specifcation.
1.2 Applicability
The requirements of this standard apply to batch heat treatment operations that establish or afect the fnal mechanical properties and include stress relief operations. This standard applies to carbon steel, low-alloy steel, stainless steel, and nickel-base alloys. Case hardening, induction hardening, and fame hardening are not covered by this standard.
NOTE This standard does not limit the responsibility of any manufacturer of commercial products using batch heat treating services and manufactured to an API standard from its responsibility for compliance with all applicable requirements of that API standard.
1.3 Heat Treatment Specifcation Levels (HSLs)
This standard establishes the requirements for three heat treatment specifcation levels (HSLs). These HSL designations defne diferent levels of heat treatment technical, quality, and qualifcation requirements.
