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:
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
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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