[MW:17391] RE: 17372] PRE HEAT PROCEDURE OF E 7016 -1 ELECTRODE

Hi,

You are fully complied with procedure already as you mentioned below, but I think you should check the welding condition like wind prevent,..or preheat before welding…

Wish you success

 

Best Regards,

Vu Duc Thuan

Phone: +84(0) 983 017 936

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of jiji lal
Sent: Saturday, April 13, 2013 12:07 PM
To: materials-welding@googlegroups.com
Subject: [MW:17372] PRE HEAT PROCEDURE OF E 7016 -1 ELECTRODE

 

SIR,

I'm engaged with welding of API 5LX 80  grade pipeline for regassified LNG transmission . We do  Tie-in method using SMAW+FCAW.

For root pass welding we use E7016-1 electrode after pre heating 250 degree for 2 hr in mother oven and maintain 100 degree in holding oven . during RT interpretation severe hollow bead and porosity observed in root .hence PMC sent almost all joints for repair.now it becomes a serious issue and I think ,the pre heat method was not proper. kindly advice me in this issue.

 

Mr.Jijilal k .m

qa/qc dept. tecpro ltd.

kochi.

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