GB/T 31481-2015Guidance for gas/materials compatibility of cryogenic vessels (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard uses the translation method identical with ISO 21010:2014 "cryogenic gas container and material compatibility." this standard and ISO 21010:2014 in comparison, made the following editorial changes.

Units --- The standard pressure value by bar in terms of MPa;

--- Appendix A, supplemented with "oxygen conditions commonly used in metal materials shown in Table A.1," the key words, Table A.1 selected by the flag "×" to "sqrt", and gives Remarks at the table;

--- According to the test report given in Appendix B sample contents of the table, adjust the test report Table B.1;

--- Figure B.2, the key 2 (pressure natural temperature value) corresponding to the dotted line extends to the Z axis;

--- By the original standard error, the C.4 in 11 to 9 members and an inner diameter 14mm outer diameter 14mm modifications; Figure C.1, the member no. 9 (connecting pipe) clear outer diameter of 14mm, an inner diameter of 11mm, delete key 11 and its associated content.

This standard by the National Standardization Technical Committee of the boiler pressure vessel (SAC/TC262) and focal points.

This standard was drafted. Shanghai Gas Industry Association, East China University of Technology, China Special Equipment Inspection and Research Institute, the National Petroleum refining Drilling of Quality Supervision and Inspection Center, Air Liquide (China) Investment Co., Ltd., Hangzhou specialty materials Fujitec Co., Ltd., Jiangsu special Equipment Safety Supervision Inspection Institute branch in Zhangjiagang, Changzhou Braun Cryogenic Equipment Co., Ltd., CIMC Enric Holdings Investment (Shenzhen) Co., Division Shanghai Institute of Special Equipment Inspection, Shanghai Huayi Group Equipment Engineering Co., Ltd., Nantong CIMC Tank Equipment System Co., Ltd. made.

1 Scope

This standard specifies the cryogenic gas container material compatibility requirements, but not included in the conditions of low temperature mechanical performance requirements.

This standard specifies the general principles of material and gas compatibility determination, pure oxygen or oxygen-enriched material and environmental compatibility as well as the specific requirements Cryogenic container and its ancillary equipment Compatibility Test methods for metallic and non-metallic materials with oxygen.

This standard applies to refrigerated liquefied gases media environment, and materials may come into contact with the refrigerated liquefied gas.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

ISO 10297:1999 Cylinders refillable cylinder valve technical requirements and type testing (Transportablegascylin-ders-Cylindervalves-Specificationandtypetesting) ISO 23208 cryogenic containers cryogenic conditions cleaning requirements (Cryogenicvessels-Cleanlinessforcryogenic service)

3 Compatibility than, material in addition to oxygen gas

Cryogenic container application temperature range from ambient up to the lowest possible temperature. When not involved in oxygen conditions, generally at room temperature to consider the compatibility of corrosion and hydrogen embrittlement, etc., in cryogenic conditions generally can be ignored.

Cryogenic material in the container with gas other than oxygen compatibility, refer to ISO 11114-1 and ISO 11114-2.

4 Oxygen conditions in the general requirements for materials