Thursday, January 7, 2010

Re: [MW:3987] RE: 3981] RE: 3979] Need confirmation as per code

Hi,
I could understand in this particular case, you need a preheat. Just see, in the factual conditions to maintain the preheat and ensure no sudden cooling. If you can do that, you can go for welding.
Thanks,
K.Rajagopal

2010/1/7 ctcit-an&mma-Dilip Kumar <dilipkumar@ctci.co.th>

Hi,

 

I understand, you mention system is filled by water for hydro test, but hydro test not yet done.

And if Owner is allowing you to perform the welding, you should go ahead; regarding welding point of view, welding is allowable in piping when system is filled,

Even with hydro carbon and under pressure during HOT TAPPING WORK.

 

Sorry I right now I am not in position to find any code for you, for welding applicable, you should contact your QA/QC manager.

 

Thanks

 

With regards.

 

Dilip Kumar 帝力普 庫馬 )

P  Note- Please consider the environment before printing this e-mail.


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hamed
Sent: Thursday, January 07, 2010 3:54 PM
To: materials-welding@googlegroups.com
Subject: [MW:3981] RE: 3979] Need confirmation as per code

 

Hi

I never see in any standard or code to allow in this regard. So I think your Hydro test was rejected . you should release the water & weld the pad & again do the test.

 

Sincerely yours

Hamed Malekan

.Panahsaz Iran Eng. Co.

.Mechanical Expert (LPG Tanks in South Pars-Assaluyeh)

.Tel:  +98 21 88801179  - Fax: +98 21 88900756

 

 

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of nawab ali bhatti
Sent: Wednesday, January 06, 2010 2:42 PM
To: materials-welding@googlegroups.com
Subject: [MW:3979] Need confirmation as per code

 

 

Dear Members / Friends

 

I need code reference regarding following

                Q.1: Client wants to weld pads without releasing water?

                Q.2:  Can weld without releasing water, if yes what problems will appear  in          future?

                Q.3:  If we can weld, what is the code / standard acceptance criteria?   

                      subcontractor filled water for Hydrotest without completing the welding of some pads(plate 9mm) & shoe supports      

Materials as following

1.       Pipe Thickness is 23.83 mm

2.       Dia 18"

3.       Service : high pressure steam

4.       Design pressure/temperature is 53.4 bar/427C

5.       Test pressure is 148.2 Bar as per B31.3

 

 


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