Petroleum and natural gas industries — Threading, gauging, and thread inspection of casing, tubing and line pipe threads — Specification

Specifies dimensional requirements on thread and thread gauges, and covers the instruments and methods for the inspection of threads for line pipe, casing and tubing. Requirements are specified in API Specification STD 5B (STD 5B), thirteenth edition, May 31, 1988 which is adopted as ISO 10422. For the purposes of international standardization, modifications shall apply to specific clauses and paragraphs of API STD 5B. These modifications are outlined.