New nozzle on a steel storange tank
New nozzle on a steel storange tank
(OP)
Hi everybody !
This is my first post on this forum, so nice to meet you all :)
I have a question regarding a water storange tank in use, operating at atmospheric pressure. We want to add 3 new nozzles on this equipment. Is the API 650 ruling this kind of modifications ? What would be the main points to be aware of, for example do we have to re-test the tank in pressure afterwards ?
Thank you in advance, and sorry for my english - I'm french !
Dani
This is my first post on this forum, so nice to meet you all :)
I have a question regarding a water storange tank in use, operating at atmospheric pressure. We want to add 3 new nozzles on this equipment. Is the API 650 ruling this kind of modifications ? What would be the main points to be aware of, for example do we have to re-test the tank in pressure afterwards ?
Thank you in advance, and sorry for my english - I'm french !
Dani





RE: New nozzle on a steel storange tank
If the tank is for potable water and constructed to AWWA D100, it is more likely controlled by the contractual language between you and your client.
RE: New nozzle on a steel storange tank
Thank you for your answer.
I have looked at API 653, and I understand that we just have to add a reinforcing plate around our new nozzles.
As for the testing, our nozzles would be of 12 inches. If I look at 10.3.1.2a, I only have to perform a full hydrostatic test of 24 when the modification is "the installation of any shell penetration beneath the design liquid level larger than 12 inches NPS".
So for my 12" nozzles, that would be ok right ?
Thanks again !
Dani
RE: New nozzle on a steel storange tank
RE: New nozzle on a steel storange tank
thank you for your answer, I have checked section 9.8 of API 653 and I have another question : where can I find the requirements for needing integral reinforcement ?
Thank you !
Daniel
RE: New nozzle on a steel storange tank
RE: New nozzle on a steel storange tank
RE: New nozzle on a steel storange tank
Or, search for the key word "reinforcement" if it is a pdf
Also, the answer changes if the shell material is a higher strength lower ductility grade.