XL83NL
Mechanical
- Mar 3, 2011
- 3,109
All,
After welding a 2" SS316 weldolet, 40S, on a 10" SS316 pipe, it was noticed the pipe warped/got oval due to high heat input (probably the welder didnt let the weldolet cool down prior to making a new bead).
I was wondering what one may accept as an ovality limit. The pipe is ASTM A312; A312 refers to ASTM A999 for ovality limits.
The inward shrinkage around the weldolet is approx half an inch, maybe alittle more. Given ASTM A999 table 1, this may not be acceptable.
Should A999 be used also for 'after-welding' pipe OD variations, or should it be seen strictly to the 'as-delivered' pipe dimensions (i.e. prior towelding)?
The line design is atmospheric, 400 C.
After welding a 2" SS316 weldolet, 40S, on a 10" SS316 pipe, it was noticed the pipe warped/got oval due to high heat input (probably the welder didnt let the weldolet cool down prior to making a new bead).
I was wondering what one may accept as an ovality limit. The pipe is ASTM A312; A312 refers to ASTM A999 for ovality limits.
The inward shrinkage around the weldolet is approx half an inch, maybe alittle more. Given ASTM A999 table 1, this may not be acceptable.
Should A999 be used also for 'after-welding' pipe OD variations, or should it be seen strictly to the 'as-delivered' pipe dimensions (i.e. prior towelding)?
The line design is atmospheric, 400 C.
