On top of below mail, the materials will be weaken only if the test
pressure exceeds the yield strength of the materials.
In all codes, the test pressure will consider the above fact and test
temperature, so the weakening of materials is rare if you follow appropriate
fabrication procedures.
Consideration shall be given what was the cause of failure, rather than how
many time hydrotest allowed.
Rgds,
K.Babu
----- Original Message -----
From: "Kathalingam Babu" <kathalingam.qaqc@ppl.com.sg>
To: <materials-welding@googlegroups.com>
Sent: Tuesday, May 04, 2010 2:22 PM
Subject: Re: [MW:5042] Hydrotest of Piping System
> Hi
>
> For your info, if the system fails , it doesn't mean, your weaking the
> materials.
>
> I don't think , there is any restriction on how many times the hydrotest
> allowed.
>
> Rgds,
>
> K.Babu
> Singapore
>
>
> ----- Original Message -----
> From: "dhinesh gnanadhas" <dhineshlhmm@gmail.com>
> To: "Materials & Welding" <materials-welding@googlegroups.com>
> Sent: Tuesday, May 04, 2010 2:03 PM
> Subject: [MW:5042] Hydrotest of Piping System
>
>
>> Hi.
>>
>> If the piping system getting fails in every test. Howmany times we can
>> do the hydro test for the same piping system?
>>
>> If we are doing the the hydrotest, we are weakening the pipe material.
>> So, Howmany times the same system can be allowed to retest?
>>
>> --
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>>
>
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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