BS ISO/TR 12391-3:2002

Foreword
Introduction
1 Scope
2 References
3 Symbols
4 Background information
5 Experimental test programme
  5.1 Types of cylinder tested
  5.2 Material properties tests
  5.3 Description of the flawed-cylinder cyclical
      burst test
6 Flawed-cylinder cyclical burst test results
  6.1 Flawed-cylinder burst test procedure
  6.2 Flawed-cylinder cyclical burst test results
      for group B materials
  6.3 Flawed-cylinder cyclical burst test results
      for group C materials
  6.4 Flawed-cylinder cyclical burst test results
      for group D materials
7 Discussion
  7.1 Background
  7.2 ISO 9809-2 flawed-cylinder cyclical burst test
      procedures and acceptance criteria
  7.3 Comparison of the flawed-cylinder cyclical burst test
      with the flawed-cylinder burst test with monotonic
      pressurization to evaluate fracture performance
8 Summary and conclusions
Bibliography

Applicable to seamless refillable cylinders of all sizes from 0,5 l up to and including 150 l water capacity produced of steel with tensile strength greater than 1100 MPa. Provides the technical rationale and background to guide future alterations of existing ISO standards or for developing advanced design standards.

This part of ISO/TR12391 applies to seamless refillable cylinders of all sizes from 0,5l up to and including 150l water capacity produced of steel with tensile strength (R_m) greater than 1100MPa.

It can also be applied to cylinders produced from steels used at lower tensile strengths. In particular, it provides the technical rationale and background to guide future alterations of existing ISO standards or for developing advanced design standards.

This part of ISO/TR12391 is a summary and compilation of the test results obtained during the development of the “flawed-cylinder cyclical burst test”. The test is an alternate test method to the flawed-cylinder burst test with monotonic pressurization and is used to evaluate the fracture performance of steel cylinders which are used to transport high-pressure compressed gases.

The concept and development of the flawed-cylinder cyclical burst test is described in ISO/TR12391-1. The details of the test method and the criteria for acceptable fracture performance of steel cylinders are given in 9.2.5.3.2 of ISO9809-2:2000. In this part of ISO/TR12391, test results are reported for more than one hundred flawed-cylinder cyclical burst tests that were conducted on seamless steel cylinders that ranged in tensile strength from 750MPa to 1210MPa. The test method is intended to be used both for the selection of materials and to establish design parameters in the development of new cylinders as well as for an efficient quality control test to be used during the production of cylinders.