04 Conditions for Using Fusible Links to Replace Pressure-Relief Devices

14:55, 11/07/2024

Circular 32/2017/TT-BGTVT has been issued by the Ministry of Transport regarding the National Technical Regulation on pressure equipment on transportation vehicles and equipment, and devices for exploration and exploitation at sea.

To be specific:, in the event of a fire around the cylinder that has been isolated from the safety valve and under the following conditions, Circular 32 allows the use of a fusible plug to replace the pressure relief device:

- The pressure relief device is required solely for the protection of the cylinder from fire or other unforeseen external heat sources;- The service and installation conditions ensure that no deposits block the device or restrict the discharge;- The substances contained in the cylinder are non-toxic and non-flammable, and the water capacity of the cylinder does not exceed 500 liters, or the substances contained in the cylinder are toxic and flammable and the water capacity of the cylinder does not exceed 100 liters;- These plugs comply with the requirements of this section.

Note: In special cases and with the agreement of the involved parties, tin solder or soft solder with an appropriate melting temperature can be used instead of the fusible plug.

See installation requirements at Circular 32/2017/TT-BGTVT effective from April 1, 2018.

- Thanh Lam -

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