Table of Contents

1 Scope
2 References
3 Terms, Definitions, and Acronyms
   3.1 Terms and Definitions
   3.2 Acronyms
4 Design
5 Base Metal Requirements
   5.1 Material Specification
   5.2 Steel Making Practice
   5.3 Chemical Composition Limits
   5.4 Heat Treatment
   5.5 Mechanical Properties
6 Welding Consumable Requirements
   6.1 Material Requirements
   6.2 Mechanical Requirements
7 Welding, Heat Treatment, and Production Testing
   7.1 General Welding Requirements
   7.2 Welding Procedure Qualification
   7.3 Preheat and Dehydrogenation Heat Treatment (DHT)
   7.4 Production Testing of Base Metal Welds
   7.5 Weld Overlay or Integral Clad
   7.6 Final Postweld Heat Treatment (PWHT)
8 Nondestructive Testing (NDE)
   8.1 General
   8.2 NDE Prior to Fabrication
   8.3 NDE During Fabrication
   8.4 NDE After Fabrication and Prior to Final PWHT
   8.5 NDE After Final PWHT
   8.6 Positive Material Identification
9 Hydrostatic Testing
10 Preparation for Shipping
11 Documentation

Abstract

Describes materials and fabrication requirements for new 1 [1/4]Cr-[1/2]Mo steel heavy wall pressure vessels and heat exchangers for high-temperature, high-pressure hydrogen service.

General Product Information

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