Active standard | Published: 01/08/2024

API TR 21D

A Study of the Effect of Thread Forming on the Susceptibility of Precipitation Hardened Ni-Based Alloy Fasteners to Hydrogen Embrittlement, First Edition

Available languages: English

Available design: electronic (protected pdf), Print design

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Detail information

Designation: API TR 21D

Publication date: 01/08/2024

Pages: 42

Country: American technical standard

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Anotation

This report quantifies the hardness profile of both machined and rolled threads in precipitation hardened nickel-based alloys (PHNAs); studies the effects of both machined and rolled threads on hydrogen induced stress cracking (HISC) susceptibility in relevant PHNAs; tests these PHNA grades used for bolting per the requirements of API standards; and provides guidance for the use of the selected testing methodology and resultant test data in the petroleum and natural gas industry. See more

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