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API SPEC 5B Document Information:
Title
Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe Threads
American Petroleum Institute
Publication Date:
Apr 1, 2008
Scope:
COVERAGE
This Specification covers dimensions and marking requirements
for API Master thread gauges. Additional product threads and thread
gauges as well as instruments and methods for the inspection of
threads for line pipe, round thread casing, buttress casing, and
extreme-line casing connections are included. It is applicable when
so stipulated in the API standard governing the product. The
inspection procedures for measurements of taper, lead, height, and
angle of thread are applicable to threads having 111/2 or less
turns per in. (111/2 or less turns per 25,4 mm). All thread
dimensions shown without tolerances are related to the basis for
connection design and are not subject to measurement to determine
acceptance or rejection of product.
By agreement between the purchaser and manufacturer, the
supplemental requirements for Enhanced Leak Resistance LTC in SR22
shall apply.
INSPECTION
Thread inspection applies at the point of manufacture prior to
shipment, to inspection at any intermediate point, to inspection
subsequent to delivery at destination, and to inspection by
inspectors representing the purchaser or the manufacturer. The
manufacturer may, at his or her option, use other instruments or
methods to control manufacturing operations; but acceptance and
rejection of the product shall be governed solely by the results of
inspection made in accordance with the requirements of this
Specification.
OTHER REQUIREMENTS
The applicable product specification should be consulted for
requirements not given herein.
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