Re: [MW:25559] Hydrostatic leak testing

joint exposed is for insulation. You may do priming painting unless sensitive leak test as per B31.3 para 345.3.1.

Regards,
S.perumal.

On Oct 17, 2016 5:59 PM, "'prem_nautiyal26' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Dear all

Vendor has offered piping spool for hydrostatic test after painting.

Code of construction is ASME B31.3. Category M fluid service.

Vendor argues that as per ASME B31.3 clause 345.3.1 all joints may be primed and painted prior to leak testing.

However same clause also mentions that all joints Welds shall be left exposed for examination during leak testing which is contradictory. 

Nothing is mentioned in hydro test procedure about painting.

How to accept ?

Regards 

Prem  Nautiyal 

9769316004

Sent from my Samsung Galaxy smartphone.

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