In-service welding for hot tap split tee installation


Performing welding operations onto operating pipelines for maintenance purposes or to attach branch connections is very dangerous. These operations require proper procedures, welder qualifications, and must address safety issues successfully. “Supply Integration Service Co.,Ltd” (SIS) is one of the industry leading in professional welding on pressurized, in-service piping. We offer a full range of welding service to fit specific customer requirement. We have been trusted to provide in-service welding to PTT natural gas pipeline since 2004. We have qualified team of welder who have experience with live line welding on pipeline from size 2” up to 42”.

Scope of our services include:

  • Project Management
  • Design Welding Procedure (WPS) and PQR base on customer requirement
  • Provision of Qualified welder and supporting team
  • QA/QC Inspection, NDT weld inspection, and Leak testing
  • Cold cutting & Tie-in
  • Hot tap pitch and related civil construction