API Spec 5B - Threading, Gauging, Inspection of Casing/Tubing Connections
- Standard System: API (American Petroleum Institute)
- Current Edition: 2019, 16th
- Product Category: Metal Pipe - OCTG
- Test Category: Dimensional Measurement
- Equivalent Standards: -
Description
API Spec 5B, Threading, Gauging, and Inspection of Casing, Tubing, and Line Pipe Threads, 16th Ed. (Dec 2017) + Addenda 1–3 (through 2021), ~115 pp. Covers dimensions, tolerances, and marking for API threads (casing round STC/LTC, buttress BTC, tubing round NU/EUE, line pipe), plus gauges (master, working) for acceptance. Inspection parameters: standoff, diameter/ovality, addendum, taper, lead, height, angle. Ring and plug gauges measure functional size. Final acceptance per this specification only. Other methods allowed for process control.
Edition Notes
16th Ed. Errata 1+2 (2018). latest edition
Deprecated / Withdrawn Editions
- API 5B (previous edition): expired.current edition: 16th Ed 2019