The scope of application includes safety equipment necessary for the safe operation of pressure vessels and boilers. These include safety valves, bursting discs, safety locks, and pressure-gauges etc.
As TSG-regulations don’t always clearly state if a license is required (see standards) it is extremely difficult for a manufacturer to make regulatory decisions: whilst national standards apply to pressure vessels, they generally don’t apply to safety equipment!
As a result specific type testing is required (see type testing). Such type testing is performed exclusively according to Chinese standards. Occasionally you may not find a Chinese standard specifically applicable to your equipment.
We have experienced this for many years and know how to encounter such situations.