Replacing a 5Cr Pass Partition
Replacing a 5Cr Pass Partition
(OP)
To start, this is for an ASME Section VIII-1 heat exchanger.
I am having a debate with some of the others in my office and was wondering if people here have any opinion. I am replacing a damaged pass partition on a 5 Cr channel. When we remove the existing pass partition, we will not cut all the way to the ID of the channel but stop short. Then we will weld the replacement pass partition to the remains of the original pass partition. Since we are not welding, cutting, or even touching the pressure retaining section of the channel, do we still have to PWHT the channel per CODE and if not, should we do so anyway for precautionary reasons?
Thoughts?
I am having a debate with some of the others in my office and was wondering if people here have any opinion. I am replacing a damaged pass partition on a 5 Cr channel. When we remove the existing pass partition, we will not cut all the way to the ID of the channel but stop short. Then we will weld the replacement pass partition to the remains of the original pass partition. Since we are not welding, cutting, or even touching the pressure retaining section of the channel, do we still have to PWHT the channel per CODE and if not, should we do so anyway for precautionary reasons?
Thoughts?





RE: Replacing a 5Cr Pass Partition
How far away from the original weld are you planning?
How thick is the material?
RE: Replacing a 5Cr Pass Partition
With that said, you can try qualifying a temper bead weld procedure for the 5Cr. Depending on the results, you may still need to perform a local PWHT, it depends on the service conditions.
RE: Replacing a 5Cr Pass Partition
Thanks,