[MW:551] defective fittings concealed with welding are being supplied by Chinese companies

 

-----Original Message-----
From: Siddiqui, Amanullah UEP34
Sent: Tuesday, June 26, 2007 16:23
To: Riyamy, Saif UEC11
Subject: FW: Notification of new entries in "Project Delivery Global Network - Alerts, Queries, Notices".

 

Saif,

There are some defective fittings concealed with welding are being supplied by Chinese companies, you may like to read the below alert:

Regards

Aman

================================

 

 

 

Currently SNC Moerdijk is implementing a 10 million+ project in the MSPO-2 unit. For these projects numerous piping materials have to be supplied, diameters ranging up to 56”. Most materials are made of AISI 316L stainless steel.

 

Initially some issues were encountered on a shipment of 40” flanges, where cracking was observed visually. Follow-up inspections with dye penetrant testing further revealed that 10 out of 60 flanges had crack indications. Metallurgical investigations confirmed that cracking was caused by forging defects. Moreover, the investigations showed that cracking was concealed by welding! (see figure 1). The whole shipment had to be rejected. The manufacturer of the flanges is: Wenzhou Fada Flange Co Ltd, Wenzhou PRC.

 

In parallel, another shipment was received of fittings, sizes 8”and larger, including longitudinally welded fittings Since materials certificates and test reports were incomplete, additional acceptance tests were performed. These tests not only revealed that unacceptable welding defects were found on welds that were approved by the notified body, there were additional welds too! (see figures 2 and 3). With further investigation it became clear that the majority of the fittings appeared to have additional welds, as if they were assembled by pieces. The certificates did not mention any additional welds, nor repairs and were witnessed and approved by the NoBo (!). Also, while the longitudinal welds were visible, the additional welds were so well concealed that they could only be found by eddy current testing. Again, the whole shipment was rejected. The manufacturer of the fittings is: Shanghai Want Industry Co Ltd, Shanghai, PRC.

 

 

 

 

 

 

 

 

 

Figure 1. Weld covering defect in flange

 

 

 

 

 

 

   

 

Figure 2. 24”elbow, with dotted line indicating additional weld as detected by Eddy Current and confirmed by metallography.

 

 

 

-----Original Message-----

From: sitescape-rijswijk@shell.com [mailto:sitescape-rijswijk@shell.com]
Sent: Monday, June 25, 2007 15:09
To: Distribution
Subject: Notification of new entries in "Project Delivery Global Network - Alerts, Queries, Notices".

 

There is 1 new entry in "Project Delivery Global Network - Alerts, Queries, Notices".

--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
-~----------~----~----~----~------~----~------~--~---