Venkatachalam Ponnusamy
Petroleum
- Dec 7, 2020
- 29
Hi..
Refer to the subject, our client have requirement for Tube Bundle Replacement for Shell & Tube Heat Exchanger..
Our scope includes Hydro test of tube bundle on Shell Side only, for the same we have to design a dummy shell, Test Flange, Test Ring & Packing Gland to complete the hydro on shell side since TEMA type is AES(H), we have identical 4 Tube bundles to be hydro tested using dummy shell, so that i can use one testing fixtures for all (4) bundles.
My question is since the purpose of dummy shell & testing fixtures is to complete shop hydro test to check the integrity of joints & Tube to T/S joint leaks. In such case hope i don't have to consider Corrosion Allowance for any of the accessories like dummy shell & testing fixtures.
Also should i consider 90% of yield stress as allowable stress to arrive the thickness of dummy shell, test flange & test rings ? in these way i can optimize the thickness of dummy shell & testing fixtures which will give commercial advantage. Is there any other optimization is possible to have commercial advantage since these dummy shell & testing fixtures will go scrap once shop test is done.
Requesting experts & experienced persons advice in this regards..
Refer to the subject, our client have requirement for Tube Bundle Replacement for Shell & Tube Heat Exchanger..
Our scope includes Hydro test of tube bundle on Shell Side only, for the same we have to design a dummy shell, Test Flange, Test Ring & Packing Gland to complete the hydro on shell side since TEMA type is AES(H), we have identical 4 Tube bundles to be hydro tested using dummy shell, so that i can use one testing fixtures for all (4) bundles.
My question is since the purpose of dummy shell & testing fixtures is to complete shop hydro test to check the integrity of joints & Tube to T/S joint leaks. In such case hope i don't have to consider Corrosion Allowance for any of the accessories like dummy shell & testing fixtures.
Also should i consider 90% of yield stress as allowable stress to arrive the thickness of dummy shell, test flange & test rings ? in these way i can optimize the thickness of dummy shell & testing fixtures which will give commercial advantage. Is there any other optimization is possible to have commercial advantage since these dummy shell & testing fixtures will go scrap once shop test is done.
Requesting experts & experienced persons advice in this regards..