CGA G 4.4 : 2012

1 Introduction
2 Scope and purpose
3 Definitions
4 Design philosophy
5 Piping, valves, and equipment
6 Cleaning
7 Construction
8 Design and construction of control stations
9 Operation, monitoring, and maintenance
10 General protective measures
11 References
12 Additional references
Appendix A - Description of promoted ignition
             combustion test method (Informative)
Appendix B - Potential ignition mechanisms
             (Informative)
Appendix C - Table of nominal alloy compositions
             and ranges (Normative)
Appendix D - Table of exemption pressures and
             minimum thicknesses (Normative)
Appendix E - Table of minimum safety distances
             (without barriers) for oxygen control and
             isolating/metering stations (Informative)
Appendix F - Example of preventive maintenance
             program (Normative)

Specifies metal oxygen pipelines, distribution piping systems, and gaseous oxygen piping on an air separation plant external to the coldbox. Limited to gaseous oxygen with a temperature range between -22 degrees F and 400 degrees F (-30 degrees C and 200 degrees C), pressures up to 3000 psi (21 MPa) and a dew point of -22 degrees F (-30 degrees C) or lower depending on local conditions.