This standard specifies requirements for the qualification,
production, and documentation of corrosion-resistant
bolting used in the petroleum and natural gas industries.
This standard applies when referenced by an applicable
API equipment standard or otherwise specified as a
requirement for compliance.
This standard establishes requirements for two bolting
specification levels (BSL). These two BSL designations
define different levels of technical, quality, and
qualification requirements: BSL-2 and BSL-3. The BSLs
are numbered in increasing levels of requirements in
order to reflect increasing technical, quality, and
qualification criteria. BSL-2 and BSL-3 are intended to be
comparable to BSL-2 and BSL-3 as found in API 20E.
BSL-1 is omitted from this standard.
This standard covers the following product forms,
processes, and sizes:
a) machined studs,
b) machined bolts, screws, and nuts,
c) cold-formed bolts, screws, and nuts with cut or
cold-formed threads,
d) hot-formed bolts and screws
e) hot-formed bolts and screws =1.5 in. (38.1 mm)
nominal diameter,
f) roll threaded studs, bolts, and screws
g) roll threaded studs, bolts, and screws =1.5 in.
(38.1 mm) diameter,
h) hot-formed nuts
i) hot-formed nuts =1.5 in. (38.1 mm) nominal
diameter.