CGA TR-2 : 2004(R2018)

1 Introduction
2 Scope
3 Definitions
4 Background information
  4.1 Basic considerations of cylinder design
  4.2 Basis for the DOT-3A cylinder specification
  4.3 Basis for the DOT-3AA cylinder specification
  4.4 Summary of the background of cylinder design
       specifications
5 Review of existing cylinder specifications
  5.1 DOT-3A specification (49 CFR Part 178.36)
  5.2 DOT-3AA specification (49 CFR Part 178.37)
  5.3 ISO 9809-3:2000, Gas cylinders - Refillable
       seamless steel gas cylinders - Design,
       construction, and testing - Part 3: Normalized
       steel cylinders
  5.4 ISO 9809-1:1999, Gas cylinders - Refillable seamless
       steel gas cylinders - Design construction,
       and testing - Part 1: Quenched and tempered
       steel cylinders with tensile strength less than
       1100 MPa
  5.5 Present worldwide use of DOT-3A type cylinder
6 Discussion
  6.1 Review and summary of the Taylor-Wharton
       letter and report
  6.2 Occurrence and control of cylinder fragmentation
  6.3 Service experience with DOT-3A type cylinders
  6.4 Single flaw fracture propagation mode
  6.5 Multiple flaw fracture propagation mode
  6.6 Fracture initiation
  6.7 Fracture control by stress level
  6.8 Current design standards
  6.9 EIGA test data
  6.10 General discussion
  6.11 Cylinder failure mode under pneumatic loading
7 Conclusions
8 References
Table
Figures
Appendix
Appendix A - Basic Considerations of Cylinder Design
             (Informative)

Reviews the in-service performance of DOT-3A cylinders to determine their suitability for continued use.