188.8.131.52.4.3 Attended Operations — Alternative Method of System Sizing
(B) Gas Detection. Gas detection shall be used to provide a warning to alert the operators to emission of gas into the zone of local exhaust, and the following requirements also shall apply:
- The system shall be capable of detecting gas at the permissible exposure limit (PEL) or the ceiling limit for the gas being processed.
- Activation of the gas detection system shall provide a local alarm.
(C) Process Shutdown. Operations involving the gas detected shall be shut down and leaks repaired. [55:184.108.40.206.3.2(C)]
(D) Piping System Construction. Piping systems used to convey gases shall be of all-welded construction throughout, with the exception of fittings used to connect cylinders, containers, or tanks, or any combination thereof, to the process system. [55:220.127.116.11.3.2(D)]