Active standard | Published: 01/10/2026

API RP 5B1

Gauging and Inspection of Casing, Tubing, and Line Pipe Threads, Sixth Edition

Available languages: English

Available design: electronic (protected pdf), Print design

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Detail information

Designation: API RP 5B1

Publication date: 01/10/2026

Pages: 138

Country: American technical standard

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Anotation

This recommended practice provides the appropriate inspection techniques to be used for comparing measurements of threaded connection product geometry with dimensions and tolerances specified in API 5B. This document supplements and augments API Spec 5CT and API Spec 5L, which mandate physical and mechanical properties of casing, tubing, and line pipe. In all cases, the latest edition of API 5B takes precedence if a dispute arises between parties.

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