API RP 934-A Addendum 1

API RP 934-A Addendum 1 Addendum 1 to Materials and Fabrication of 2 1/4Cr-1Mo, 2 1/4Cr-1Mo-1/4V, 3Cr-1Mo, and 3Cr-1Mo-1/4V Steel Heavy Wall Pressure Vessels for High-temperature, High-pressure Hydrogen Service, Second Edition

Amendment by American Petroleum Institute, 02/01/2010