Re: [MW:3986] RE: 3979] Need confirmation as per code

I Think it is not the correct way. Instead of doing welding after hydrotest, always complete the welding and related NDT before hydrotest and I hope the material is Carbon Steel and it may need preheating even if PWHT is not required for fillet welding so if you can give complete details, experts in our group may advice further.

What is the location? If India, is it also covered under IBR?

Regards,

Ramakrishna.

On Thu, Jan 7, 2010 at 3:21 PM, Nageswararao Nistala <nistala3@gmail.com> wrote:

Dear friends,

 

in my view no code permits for such practices but if client approves you can complete the hydrotest and dewater the line and complte the pad welding, After completion of the pad welding you can do the adiitional NDT on the Pad joints.

 

Regards

 

Nageswararao

On Thu, Jan 7, 2010 at 2:24 PM, Hamed <hamkan309090@gmail.com> wrote:

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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