Table of Contents

1 Scope
2 Normative References
3 Operating Experience
4 Forms of HTHA
5 Factors Influencing Internal Decarburization, Fissuring, and
  Cracking Caused by HTHA
6 Inspection for HTHA
Annex A (informative) - HTHA of 0.5Mo Steel
Annex B (informative) - HTHA of 1.25 Cr-0.5Mo Steel
Annex C (informative) - HTHA of 2.25Cr-1Mo Steel
Annex D (informative) - Effective Pressures of Hydrogen in
        Steel Covered by Clad/Overlay
Annex E (informative) - Summary of Inspection Methods
Annex F (informative) - HTHA of Non-PWHT'd Carbon Steels
Annex G (informative) - Methodology for Calculating Hydrogen
        Partial Pressure in Liquid-filled Piping
Annex H (informative) - Internal Company Data Collection -
        Request for New Information
Bibliography

Abstract

Provides the results of experimental tests and actual data acquired from operating plants to establish practical operating limits for carbon and low alloy steels in hydrogen service at elevated temperatures and pressures.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
Pages
ISBN
Supersedes	API 941 : 2008