Re: Re: [MW:28853] Re: Calculation for root gap according to tihckness of pipe

Agree its a process and also regardless of procedures, a skilled welder can handle any root gaps but if it is not acceptable, he will not proceed.

Thanks.

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From: 'GENE MATSKO' via Materials & Welding

Date: 2019-01-02 07:55

To: materials-welding@googlegroups.com

Subject: Re: [MW:28845] Re: Calculation for root gap according to tihckness of pipe

Root gap is not dependent on pipe size or thickness. For the GTAW process the root gap is generally listed as 1/8 of an inch plus or minus 1/32 inch. in the WPS. For stainless steel open butt welding with the GTAW process this root gap will be increased due to shrinkage issues. Remember, one could run a PQR using 1/32 in. open root or 1/16 in. open root or a 5/32 inch open root and it will pass. The general standard in the U.S is 1/8 in. plus or minus 1/32 inch. Most good GTAW welders can handle this root gap. 

Gene Matsko

On ‎Tuesday‎, ‎January‎ ‎1‎, ‎2019‎ ‎04‎:‎14‎:‎27‎ ‎AM‎ ‎CST, Mohd Siraj <mohd52100@gmail.com> wrote:

Root gap is  not depend on pipe size or thickness,indeed it is based on process to be used for welding.

GTAW-4-5mm

SAMW-3.5-4.5mm

SAW-1.5-2.5mm

On Friday, July 22, 2011 at 2:17:46 PM UTC+3, abhishek ojha wrote:

Dear Expert, Kindly guide me how to calculate root gap according tihckness of pipe of different /same dia.(different tickness but same dia) Thanks & Regards,   Abhishek Ojha  Engineer- Construction

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