Historical
CGA E-6 (R2012)
Standard for Hydraulic Type Pipeline Protective Devices as Required by NFPA 51 - 4th Edition
The requirements of this standard cover hydraulic type pipeline protective devices (NFPA designated Pf) for use in fuel gas pipelines supplying equipment without which it may be possible to flow oxygen or air into thefuel gas supply system.
Content Provider
Compressed Gas Association, Inc. [cga]