Re: [MW:9957] Pneumatic Leak Test

The requirement for pneumatic test after hydro test depends on client specs and sometimes per local country regulations. 

Generally test pressure is calculated as 95% of PSV set pressure in the system. (or some country regulations ask for 1.25 times max operating pressure)

Since pneumatic test is more hazardous then hydro, It is always good to do gross leak test at  2bar before increasing pressure step by step to test pressure. 

Sudheer Babu

Sent from my iPhone

On 21 Feb 2011, at 07:37, "Larry" <quality@unieng.com.au> wrote:

Hi there,

 

Construction Code: ASME B31.3

 

We have assemble a module for an offshore rig. The clients wants to do a Pneumatic leak test on the whole assembly of pipings. The pipes spools are somehow connected to each other and have been hydrostatic tested on different pressure. Now since the  assembly have different test pressure as per design, do we have to do the pneumatic test taking the least test pressure?

 

Please give me a reference from the code.

 

 

Many thanks,

 

Larry Zarate

 

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