leak test procedures

[efm]

I have tubes connected to each other to make one lin 20 m long 1/2" O.D , stainless steel , for transfering CNG in a feuling station , the working pressure is 200 bar.
I need to know the leak test procedures which will be applied to this application before starting the station.

Best regards,
efm

 

[mepl]

If you are responsible for this system you should already be aware of the statutory requirements for pressure vessels and piping systems.

Consult your appropriate industrial codes before you kill someone.