What regulations require the use of swivel fittings for filling liquefied gases?
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In recent years, the Ministry of Emergency Management (formerly the **General Administration of Work Safety**) has issued several documents and notices requiring the use of universal piping systems for filling and handling flammable, explosive, toxic, and harmful liquefied gases such as liquefied hydrocarbons, liquid ammonia, and liquid chlorine. Order No. 3121 issued by the General Administration also lists the failure to use such universal piping systems as a major potential hazard for safety accidents. May I ask: apart from **official notices and documents, are there any relevant standards or specifications that set out corresponding requirements? Thank you!
Why look for them? One can refer to those with a major hidden risk