ASME B31.3-2006 Ed. Fig. 328.5.2.c

[noz...@cimtas.com.tr]

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After welding, less than 1.5 mm gap is the cause to reject the weld after
RT?
If yes, in accordance which criteria?

Thanks...

Nebi ÖZHAN

e-mail:noz...@cimtas.com.tr

[T. Rizal H.]

1.5 mm gap is set before welding, it is to accomodate shrinkage after
welding. Of course, gap will be less than 1.5 after welding, but it is
not rejected.

What's the meaning after RT?, it is strange to perform RT on the fillet weld.

Regards,

Tex

2008/12/24 <noz...@cimtas.com.tr>:

--
Regards,

T. Rizal Hidayat

[Sreejith.Nair]

The range is 1.5 - 3mm as per saudi aramco engineering standards.In
B31.3 only approximate gap is given as 1.5mm but no limits specified.
i faced the same problem but w.r.t the max. limit.

Sree
* southern area gas projects *

[Jivan Dhamane]

Dear Friends   As per ASME 3.31.3 gap is given at the time of fit-up and offcurse after weding that gap will be less than 1.5 mm because of  shrinkage due to welding heat. the meaning of RT is nothing but radiography test and i think your client might have asked you to perfom Rt to check whether 1.5mm gap has been provided or not not rejected. Regards,   Jivan Dhamane --- On Wed, 24/12/08, T. Rizal H. <aat...@gmail.com> wrote:

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[tong tong]

Purpose of the gap is to allow the expansion of piping and fitting during welding. If there are no gap between piping and fitting may be can cause distortion. For my opinion, RT is not suitable for fillet weld but may be your client just want to ensure whether the gap is there or not.

Regards,
SBS

[durga prasad]

Gap should be given before fit up so that during welding there is shrinkage or expansion of the pipe and also RT should be performed in order to check wether there are any defects or cracks caused during  welding on the weld.If it is a pressure part it is compulsory to perform RT.

 

 

 

with regards

Durrga Prasad

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From: tong tong <ton...@gmail.com>
To: material...@googlegroups.com
Sent: Friday, December 26, 2008 7:05:31 PM
Subject: [MW:1428] Re: ASME B31.3-2006 Ed. Fig. 328.5.2.c