MSS SP-131-2004
MSS SP-131-2004
Metallic Manually Operated Gas Distribution Valvesstandard by Manufacturers Standardization Society, 01/01/2004
standard by Manufacturers Standardization Society, 01/01/2004
The purpose of this standard is to provide a Standard Practice for metallic valves used in fuel gas piping systems which are manually operated both above and below ground.