MSS SP-131-2004
MSS SP-131-2004 Metallic Manually Operated Gas Distribution Valves
standard 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.
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