Table of Contents

1 Scope
2 References
3 Operating Limits
4 Forms of HTHA
5 Factors Influencing HTHA
6 Inspection for HTHA
Annex A - High Temperature Hydrogen Attack (HTHA)
          of 0.5Mo Steels
Annex B - HTHA of 1.25Cr-0.5Mo Steel
Annex C - HTHA of 2.25Cr-1Mo Steel
Annex D - Effective Pressures of Hydrogen in Steel
          Covered by Clad/Overlay
Annex E - Summary of Inspection Methods
Annex F - Request for New Information
Bibliography

Abstract

Describes 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. Applies to equipment in refineries, petrochemical facilities, and chemical facilities in which hydrogen or hydrogen-containing fluids are processed at elevated temperature and pressure.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
Pages
ISBN