API 1104 Internal Clamp and External Clamp

[Ri@z]

Dear  All,

External clamp and internal clamp WPS and PQR procedures are qualified with downhill process and uphill process respectively.  But one joint has welded with internal clamp following  all other variables as of external clamp WPS

Is this acceptable ? If yes , how can we justify ?

Pls help very urgent 

Ray

[munee...@gmail.com]

It is in violation with conjuction to the governed approved WPS, if the paramaters of the both WPSs are not similar for shuffling.

Thanks.

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Regards,

Mohamed Muneeb Mahaboob

CSWIP 3.2-89247/2 & AWS-CWI (2007)

ASNT-NDT-L2-RTFI-RT-UT-MT-PT.

SAP#:70021650 APs:JAPID, QCS & QCI.

E munee...@gmail.com M +91-636-955-7189

Say (O Muhammad SAW to mankind). "If the sea were ink for (writing) the Words of my Lord, surely, the sea would be exhausted before the Words of my Lord would be finished, even if we brought (another sea) like it for its aid."18-109

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[bilal wahla]

external clamp and internal clamps depends on dia of pipe.  So  how you guys can change clamps?

. 

[joydev dalai]

Dear,

Clamp is not essential variable.

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Best Regards,

Joydev Dalai

Dy. Manager - QA/QC

+91-6202987794

Kalpataru Power Transmission ltd.

[Ri@z]

this is 18" dia pipe. If internal clamp is not possible, (like tie in joints) we can use external clamp . We developed different PQR-WPS for both internal and External  clamp welding. Internal with downhill progression and external clamp wps with uphill progression .  But in a circumstance we used in Internal clamp and Welded with the parameters as of External Clamp.  Only the clamp type in different 

Is it acceptable ? 

With Regards

Riaz  

[Perumal Govindan]

Dear Riaz,

Convince the Client and get it accepted. If the situation doesn't permit no other way for us, so case to case basis can be acceptable.

Regards
P Govindan

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[munee...@gmail.com]

As i said as per governed WPS, it is in violation if parameters are not identical and you said you have both approved WPS, now it is very clear that there is a change in parameter, so when there is a change in parameter, change in direction of welding which is an essential variable as per API 1104, para 5,6 and 12 direction of welding, which violates the WPS and CODE.

Anyhow you can have a word with your TPI / Owner representative.

[joydev dalai]

Dear Riaz,

Progression of welding is essential variable, clamp is not essential, so it is acceptable.

[munee...@gmail.com]

Hi,

Greetings,

I hope you are using a single WPS to join the two abutting surfaces memberane, it will be intresting if you are using mulitple WPS for each membrane, let me know.

Thanks.

---

Regards,

Mohamed Muneeb Mahaboob

CSWIP 3.2-89247/2 & AWS-CWI (2007)

ASNT-NDT-L2-RTFI-RT-UT-MT-PT.

SAP#:70021650 APs:JAPID, QCS & QCI.

E munee...@gmail.com M +91-636-955-7189

Say (O Muhammad SAW to mankind). "If the sea were ink for (writing) the Words of my Lord, surely, the sea would be exhausted before the Words of my Lord would be finished, even if we brought (another sea) like it for its aid."18-109

From: joydev dalai

Date: 2018-11-18 16:15

To: materials-welding

[rakesh kasera]

Dear Riaz

Yes u can use exetrnal clamp where ever not excess and can use the corresponding WPS

Note - When u r cutting production weld for destructive test of internal clamp welds rewelding is done by External  clamp

procedure.

Regards

Rakesh Kasera

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[Mohd Siraj]

As per API-1104 it is essential,

1) if you have both WPS,you can just change your reports.

2) if it is welded with internal clamp instead of external,then it is more stringent..and it is acceptable.

3) if is welded with external clamp instead of internal clamp,then it is not acceptable.

    # support to cut out

    # extra NDT (RT+UT) can be suggested.