Sunday, March 1, 2009

[MW:1672] RE: 1663] Buttering on Plate

Dear Mr. Pradeep,

 

If it is SHELL PLATE you connect both plate without 55 MM gap, the following will happened

 

Assume your tank Diameter is 25000 Mts., because of your gap adjustment your diameter will decrease around 17 mm from 25000.  and the radius will decrease around 8.5 mm.

 

So, as per API 650, clause 5.5.3 (Roundness tolerance) within the limit.

 

With regards,

 

S. SIVASUBRAMANIAN

QA/QC Manager

Larsen & Toubro Kuwait Construction Company

P.O. Box.1082, Fintas 51011, KUWAIT

Mobile: 00965 66387188, 00965 94005327

Fax: 00965 66321511


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pradeep kumar hormis
Sent: Saturday, February 28, 2009 9:57 AM
To: materials-welding@googlegroups.com
Subject: [MW:1663] Buttering on Plate

 

Dear All!!!

 

We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.

 

There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.

 

plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70.

--
PRADEEP KUMAR HORMIS



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