CGA - G-4.4
Oxygen Pipeline Systems (EIGA Doc 13/02)
|Publication Date:||4 December 2003|
The scope of this document is for metallic oxygen transmission and distribution piping systems, as shown in Diagram 1 of Appendix A. It is limited to gaseous oxygen with a temperature range between -30 °C and 200 °C (-22 °F and 400 °F), pressures up to 21 MPa (3000 psig) and a dew point of -30 °C (-22 °F) or lower depending on local conditions.
This document does not apply to the following processes:
- oxygen cylinder filling plants;
- medical oxygen piping installations;
- oxygen producing plants;
- oxygen compressor units;
- bulk oxygen facilities (liquid or high pressure gas) at the customer's site up to the point where gas enters the distribution systems; or
- piping on specialized equipment and machines such as scarfing, jet piercing, etc.
The purpose of this publication is to further the understanding of those engaged in the safe design, operation, and maintenance of gaseous oxygen transmission and distribution systems. It is not intended to be a mandatory standard or code. It contains a summary of the current industrial practices. It is based upon the combined knowledge, experience, and practices of the major oxygen producers in Western Europe and North America as represented by their members on the EIGA/CGA ad hoc group on oxygen pipeline transportation systems.
Some of the practices represent conservative compromises and not all situations are described. The designer is cautioned that this document is not a complete design handbook and does not do away with the need for competent engineering judgment and interpretation. It is suggested that the user review any special problems or concerns with his oxygen supplier who should be able to provide advice and guidance.
Although the technical information provided in this document is not intended to be mandatory, the word "shall" is frequently used. The use of "shall" implies a strong concern that the particular practice referenced be followed for safety reasons. The use of "should" implies that the referenced practice is commonly followed, but recognizes that other safe practices are sometimes utilized.