Discussion on the definition of emergency shut-off valves and relevant standards, as well as TSG manufacturing permits
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The existing GB/T standards define emergency shut-off valves within a relatively narrow scope of application. GB-T22653-2008 Emergency Shutoff Valves for Liquefied Gas Equipment» 3.1 Emergency shutoff valve: A valve installed on tank trucks, tank containers, storage tanks, or pipelines, which can be quickly closed manually or automatically in emergency situations. GB-T24918-2010 Emergency Shutoff Valves for Cryogenic Media» 3.1 Emergency shutoff valve: A valve installed on tank trucks, storage tanks, or pipelines, which can be quickly closed manually or automatically in the event of an accident. However, in many places today, the media used in emergency shut-off valves are not liquefied hydrocarbon gases or cryogenic media, so the aforementioned two standards do not apply. In 2019, the \"Announcement by the State Administration for Market Regulation on Matters Related to Administrative Licenses for Special Equipment (2019 No. 3)\\" was issued, which established a list of licensed entities for the production of special equipment and clarified the regulations regarding administrative licenses for safety accessories. TSG 07-2019, the Regulations on Licensing for Special Equipment Production and Filling Units, specifies the licensing requirements for emergency shut-off valves. Emergency shut-off valves require special manufacturing permits. But currently, third parties can only conduct tests by referring to the two standards mentioned above in GB/T. Pneumatic and electric ball valves, butterfly valves, etc. are not covered by these two standards. Without any testing standards to refer to, how can manufacturers of electric ball valves and butterfly valves obtain the manufacturing license for emergency shut-off valves?
The European standard is BS EN 14433; the national standard is not clear
**It’s really frustrating to see a department handle things in this way. Since emergency shut-off valves are defined as safety accessories, then please clarify their definition and requirements, along with the relevant standards. Now, for any valve that has an emergency shut-off function, whether it’s a manual valve or an instrument valve, the market supervision authorities require TSG certification for safety accessories – it’s really absurd.
This issue indeed should be clarified. Some time ago, the valve we used to shut off steam could not be used because it lacked TSG certification
There’s no way around it; sometimes the regulations don’t cover certain situations, and the designs are applied rigidly without any flexibility
Currently, there is a specific TS certification for emergency shut-off valves in China, but no relevant testing standards exist, so it is not possible to obtain this certification for now. However, our company currently holds SIL3 certification for the testing of international emergency shut-off valves.
The standard is to align with international norms, but in practice this has not been achieved; such problems exist in many places, and there are even contradictions.