Re: [MW:17271] Test subsea welded-in valve seal

Dear Mr. Toan,
Are you working in Vietnam, who is your client, consultant.
Did they forget testing right after fabrication of spool ?
Which function and pressure should be tested.
Regularly you have to cut off pipe and install temporary spool (there are inlet, pressur gauge ...) for testing. And then replace by permanent pipe, welding joints should be ndt.
How ever, this action should be follow project's procedure
I will try find some document for your reference.

Sent from my iPad

On Apr 2, 2013, at 11:09 AM, Nguyễn Văn Toàn <toanvnguyen@ptsc.com.vn> wrote:

> Dear Mr.Son,
>
> Yes, I'm Vietnamese and nice to see you :).
> Thanks for your advice but what I need 's spec to refer and how to
> check the valve seal leaking because the valve is installed in series.
>
> On 4/2/13, truong son bui <truongbs70@gmail.com> wrote:
>> Dear Toan,
>> Are you Vietnamese ? This is first time I see Vietnamese in this forum and
>> is great.
>> Your problem is simple: after welding, the welded valve may be inefficient
>> by heating (shrink, crack ...) by slag. Those cause should make the valve
>> be impaired.
>> Inorder to sure it's functionality has been perfect, you should prepaire a
>> temporary spool or hose and hydrolic pump ... for testing according by it's
>> functionality. The testing proceduce should be approval by QA authorised.
>> Wish success to you.
>>
>> On Mon, Apr 1, 2013 at 8:55 AM, toanvnguyen
>> <nguyenvantoan221@gmail.com>wrote:
>>
>>> Dear Experts,
>>>
>>> We're doing a PLEM and TPAM project. The type of valves's welded-in
>>> valve.
>>> In spec. require as follow: "After fabrication's complete, welded-in
>>> valves
>>> shall be subject to seal tests in accordance with the relevant project
>>> valve specification to demonstrate the valve functionality has not been
>>> impaired during fabrication".
>>> Could you pls give me some advice about this kind of tests. Many thanks.
>>>
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>>
>>
>>
>> --
>> Bui Son Truong - Director
>> LILAMA Consultant Co.
>> Address: 124 Minh Khai street, Hai Ba Trung Dist., Ha noi, Viet Nam.
>> Fax: +84 3624 9416
>> Tell: +84 3624 94 15
>> Mobi:+84 9034 888 39
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>
>
> --
> Best Regards,
> --------------------------------------------
> Nguyen Van Toan
> Piping & Machine Supervisor
> Structure WS 2
> - PTSC M&C
> HP: 0907496198
> email: toanvnguyen@ptsc.com.vn
> Skype: toan_ptsc_mc
>
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