Hello, i was just wondering if there was any standard of time allowed between each run of a weld test, no matter its position. By this i mean how long you weld the hot pass after the root, the fill atr the hot pass and the cap after the fill. iv heard just welding it non-stop can cause failure because of heat input.
- Thread starter JRH89
- Start date
- Messages
- 14,677
- Location
- UK
You will need to measure the interpass temperature to ensure it does not raise above the maximum temperature set in the weld procedure document. The time between runs is irrelevant really.
Pipe welds often have set times between different passes. This is due to the type of rods they use and the hydrogen release.
As Paul says its more common to specify Interpass Temps and Heat Inputs. Sometimes the interpass quoted is the max and sometimes min, this due to the grade of steel and the requirements
As Paul says its more common to specify Interpass Temps and Heat Inputs. Sometimes the interpass quoted is the max and sometimes min, this due to the grade of steel and the requirements
