We have a repaired WHB water drum (3" thick) that need to be PWHT. Its a vertical drum with 700 numbers of 2" tube holes, 7000 Kg vertical steam drum is resting on the water drum. Since we are going to PWHT this lower water drum only while 7000 kg steam drum is resting on it, that can deform the...
I have a CS vessel in operation that was POST WELD HEAT TREATED because of the sour service. Can we install SS Internal linnig on the vessel shell and bottom head to avoid any errosion that is only becuase of catalyst loading/unloading?
Normally welding after PWHT is not allowed but i believe...
A CS pressure vessel that was designed & constructed in 1975 to ASME Section VIII. The vessel was designed for 1700 psig @ 700F.
Can we use the same vessel for same service at lower design conditions (The new requirements are 521 psig @389F) Without re-rating it?
A New Name plate will be required
In a reactor having 2 chambers, uper chamber having a design pressure of 10 kg/cm2 & lower chamber having a design pressure of 12 kg/cm2. The differential pressure is 1.5 kg/cm2.
Can we calculate intermediate Head thickness using differential pressure as a design pressure?
