In-service welding support to CSA Z662, API 1104 Annex B, etc.
ProForma Engineering develops in-service welding procedures for welding on live lines. This includes:
- Sleeve type welding, typically for installation of hot-tapping tees
- Branch welding
- Applications including thin-wall applications (<1/4”), as low as 0.100”
- PQR, WPS & WPQ development, documentation and supervision of qualification
On line or in service welding is defined as welding on equipment while it is under pressure or as prudent is flowing. This is done in industry to allow repairs or to allow installation of nozzles or branches for expansions or bypasses on large construction projects.