Re: [MW:11395] Painting on joints prior to hydrotest

Dear Madhu,

                  Please refer B31.3 ,345.3.1 And 300.2,   Painting of joints are not allowed only for sensetive tests.

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From: Sivasubramanian S <siva@lntkuwait.com>
To: materials-welding@googlegroups.com
Sent: Sun, June 19, 2011 5:10:59 PM
Subject: RE: [MW:11383] Painting on joints prior to hydrotest

Dear Kumar,

Please find the below clause 345.3.1 from B31.3.  Now-a-days most of the clients are allowing for joint painting before hydrotest( particularly spools)

345.3.1 Joints Exposed. All joints, welds (including    

structural attachment welds to pressure-containing com- 

ponents), and bonds shall be left uninsulated and       

exposed for examination during leak testing, except that        

joints previously tested in accordance with this Code   

may be insulated or covered. All joints may be primed   

and painted prior to leak testing unless a sensitive leak       

test (para. 345.8) is required.        

With regards,

S. Sivasubramanian.

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of madhusoodhanan nair
Sent: Saturday, June 18, 2011 7:02 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:11372] Painting on joints prior to hydrotest

Dear Kumar

     All joints welded, screwed or flanged shall be left exposed for

examination during

the test. Before pressuring the lines, each weld joint shall be

cleaned by wire brush or power brush to free it from rust and any

other foreign matter.So  at any way don't allow painting or priming

before hydrotesting.

Regads

MADHUSOODHANAN NAIR.G

Sr Inspector,Velosi(I)

09967901872

>    Dear All

>

>    I have a query regarding painting on pressure lines (ASME B 31.3),

>

>   Can the weld joints can be primed or fully painted before hydro test? (

> test pressure- 22.5 bar, operating around 11 bar, thickness of pipe -9.53mm)

>

>   could any body help me answering on this...

>

>   Regards

>

>   Kumar.

>

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