1 Scope
1.1 Purpose
This standard specifies requirements for the qualification, production and documentation of alloy and carbon steel bolting used in the petroleum and natural gas industries.
1.2 Applicability
This standard applies when referenced by an applicable API equipment standard or otherwise specified as a requirement for compliance. An annex for supplemental requirements that may be invoked by the purchaser is included.
1.3 Bolting Specification Levels (BSL)
This standard establishes requirements for three bolting specification levels (BSL). These three BSL designations define different levels of technical, quality and qualification requirements, BSL-1, BSL-2, andBSL-3. The BSLs are numbered in increasing levels of severity in order to reflect increasing technical,quality and qualification criteria.
