Thermowell cann't fitted into the pipe...

Sunday, July 19, 2009

Sometime, we are facing with unexpected condition while in shop fabrication process. It could be the specification of the supplied fittings or instruments aren't match with the required datasheet. Or, it could be we did an error while in design process, so the supplied fittings or instruments cann't be attached into the pipe. This article will explain the solution while you've got your instrument (let's say a thermowell) cann't be attached into the pipe or wrong size of the thermowell.

Prior to discuss further regarding with the wrong size thermowell, i'd like to point that bottom side of the thermowell should be shallowed as least 1/3 ID pipe. So, while the bottom side of the thermowell cann't achieve to reach 1/3 ID pipe, then it can be categorized as wrong size thermowell.
There are two conditions while you've got your wrong size thermowell. First, the thermowell has already shop welded into the pipe via the sockolet. Then, there is nothing you can do unless just plug the thermowell using threaded plug and seal welded. Then you have to have a new one thermowll and one sockolet to be attached to the pipe at the new location as far as at the upstream location.
The other condition is while the thermowell hasn't shop welded yet, so what you have to do is just machining the thermowell OD to make the bottom side of the thermowell can reach 1/3 ID pipe.
That's all we can do while we've got a wrong size thermowell, should you have any other question or comment, please don't be hesitate to fill the comment box.