MATERIALS AND FABRICATION OF 1 [1/4]CR-[1/2]MO STEEL HEAVY WALL PRESSURE VESSELS FOR HIGH-PRESSURE HYDROGEN SERVICE OPERATING AT OR BELOW 825 DEGREES F (441 DEGREES C)
American Petroleum Institute
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
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.
| Document Type | Standard |
| Status | Current |
| Publisher | American Petroleum Institute |
