Nozzle replacement for API 650 tanks
Nozzle replacement for API 650 tanks
(OP)
Hi all,
This is the case: Is it possible to remove a 10" nozzle and to install a new one by using the same opening and reinforcing plate (without removing the reinforcing plate)? Do I need to remove the reinforcement plate and install a new one? if it can be done, I wonder if PWHT should be done. [NOTE: The shell thickness is 7/16" (11.11mm)]
I looked for it at the API 650 and 653, and I couldn't find good answers to these question. API 653 section 9.8 "Addition or replacement of shell penetration" specifically section 9.8.6 describes a procedure for the installation of a nozzle larger than 2" NPS where the shell plate thickness is greater than 1/2".
Section 5.7.4 from API 650, doesn't describe a procedure for thermal stress relief that applies to a shell plate thickness smaller than 1/2" and an opening conextion smaller that NPS 12. Section 12 from API 653, specifies some NDE procedures.
So, I wonder if some of you guys can give a hand, or a hint!!
Thanks in advance
This is the case: Is it possible to remove a 10" nozzle and to install a new one by using the same opening and reinforcing plate (without removing the reinforcing plate)? Do I need to remove the reinforcement plate and install a new one? if it can be done, I wonder if PWHT should be done. [NOTE: The shell thickness is 7/16" (11.11mm)]
I looked for it at the API 650 and 653, and I couldn't find good answers to these question. API 653 section 9.8 "Addition or replacement of shell penetration" specifically section 9.8.6 describes a procedure for the installation of a nozzle larger than 2" NPS where the shell plate thickness is greater than 1/2".
Section 5.7.4 from API 650, doesn't describe a procedure for thermal stress relief that applies to a shell plate thickness smaller than 1/2" and an opening conextion smaller that NPS 12. Section 12 from API 653, specifies some NDE procedures.
So, I wonder if some of you guys can give a hand, or a hint!!
Thanks in advance
RE: Nozzle replacement for API 650 tanks
As for heat treatment, it would be required if the nozzle was a flush type connection, per API 650. Other reasons for heat treating are to reduce the effects of stress corrosion cracking in caustic service.
If you require additional information, I believe you would need to provide additional details of your repair.
RE: Nozzle replacement for API 650 tanks
This is a NPS 10 nozzle which is located at ~460mm measured from the bottom of the tank to the center line of the nozzle.The current nozzle has an internal projection of ~1/2" or less. The new nozzle would be a double flange nozzle with an internal projection of ~ 225mm. The content is not highly corrosive, so it is not a critical service. [NOTE: The shell thickness is 7/16" (11.11mm)]. So I wonder if the current nozzle can be ground off, an a new nozzle with the characteristics mentioned above , can be installed. I also wonder if the reinforcing plate should be removed and replaced or not. Is PWHT required? According to API 653 Sec 12, some NDE are required
Thanks in advance
Cheers!
RE: Nozzle replacement for API 650 tanks
RE: Nozzle replacement for API 650 tanks