welding an olet for thermowell on longitudinal seam?
welding an olet for thermowell on longitudinal seam?
(OP)
Hi.
there's this problem found at welding shop, as mentioned in title, we have overlapping seam problem.
For further info. the material is SS316Ti, Wall thickness is 22.23mm the design condition of pipe is 3.5 BarG and 515'C
The longitudinal seam is heat treated by manufacturer.
Is it okay to drill out the hole across weld seam and attach a new olet for thermowell and apply 100% RT?
thank you
there's this problem found at welding shop, as mentioned in title, we have overlapping seam problem.
For further info. the material is SS316Ti, Wall thickness is 22.23mm the design condition of pipe is 3.5 BarG and 515'C
The longitudinal seam is heat treated by manufacturer.
Is it okay to drill out the hole across weld seam and attach a new olet for thermowell and apply 100% RT?
thank you





RE: welding an olet for thermowell on longitudinal seam?
RE: welding an olet for thermowell on longitudinal seam?
RE: welding an olet for thermowell on longitudinal seam?
RE: welding an olet for thermowell on longitudinal seam?
You're installing an o-let which is a self-reinforcing fitting, so reinforcement calcs aren't required, especially for a non-moment connection like a thermowell. You must weld out the full bevel of the fitting per the manufacturer's instructions to achieve its full design pressure/temperature rating. RT after that welding process would be impossible to interpret. Any other code-required NDT must be done- not sure what, if anything, that would entail aside from the hydrotest of the completed assembly.
If you're installing a thermowell into the o-let, I presume this is a soc-o-let. The weld between the o-let and the thermowell will be a fillet.
Is this good practice? No, but it's also not likely to be a serious problem in this case.