API RP 941 Addendum 1

API RP 941 Addendum 1 Steels for Hydrogen Service at Elevated Temperatures and Pressures in Petroleum Refineries and Petrochemical Plants, Eighth Edition, Includes Errata 1 (2016), Errata 2 (2018), and Addendum 1 (2020)

Amendment by American Petroleum Institute, 08/01/2020