Flash Back Arrestor/NRV/ IS CODE 11006

 Flash Back Arrester IS code- 11006

TERMINOLOGY

1. Flash Back arrestor:- It is a device to stop or arrest or prevent the return of the flame which can result in an explosion or of the blow back of the oxygenated gas from damaging whatever it is intended to protect. These devices may incorporate two or more safety functions.

2. Safety Relief Device — It is a device intended to prevent rupture of the flame arrestor due to sudden built in pressure which can be in a form of safety valve, bursting disc or liquid seals connected to atmosphere.

3. Safety Seals — The flame arrestors or flash back arrestors are at times also referred as safety seals.

4. Flash Back — It is the return of the flame into an apparatus or line and its propagation against the flow of the gas.

5. Non-return Valve — It prevents the flow to return from the down stream side.

6. Flame Arrestors — Device which quenches a flame.





MANUFACTURER’S TEST

The following test should be carried out by the manufacturer on flash back arrestors confirming to this standard:
a) Test with reverse flow of gas for each device; 
b) Pressure resistance test on one sample out of each lot of 100 samples; and 
c) Flame arrestor test on one sample out of each lot of 100 samples. 




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