Anti Static Test F22 at 100 Volts as per BS EN 12266

[uaepiping]

One of the valve specification states
"Additional supplementary test F22 (Antistatic design test) requirements by the MANUFACTURER with test sampling as agreed between CONTRACTOR, COMPANY and VENDOR and to be specified in the purchase requisition, for high performance triple offset butterfly valves in accordance with BS EN 12266-2"
This test is for 100 Volts. In process piping, under what scenario COMPANY (Operating Co) may ask for this test? F21 test is for 12Volts and that I believe is a normal one. How can static electricity reach a level of 100Volts? Should we retain this clause in the specification or recommend to remove it.

 

[hacksaw]

Static build up can be a major safety issue (fire and personnel injury). The voltage build up can be quire severe (much greater than 100 volts and enough to cause arcing) in non-conductive fluids.

Ball valves or those with ungrouded internals are at risk. The test you describe insures that the voltage build up is limited to 100 volts, no more.

If you are dealing with non-conductive piping or duct work, that is another matter.

 

[uaepiping]

As this was related to metal seated valves, so COMPANY asked to remove this term.