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pandit
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Join Date: Jan 2010
Posts: 2

Hydrotest Requirements for Crude Oil Distillation Column

01/19/2010 11:58 PM

We have to weld piping support clips/cleats for supporting additional pipes on the shell of an existing crude oil distillation column (designed as per ASME section VIII Div. 1. Design pressure 2 kg/cm2g)

Is it necessary to hydrotest entire column after the welding ? Is there any alternative method for weld quality assurance which will eliminate hydrotest & thereby save time & resources spent on hydrotest?
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Anonymous Poster
#1

Re: Hydrotest requirements for crude oil distillation column

01/20/2010 3:37 AM

First question; can your CD column carry the weight when filled with water?
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pandit
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Join Date: Jan 2010
Posts: 2
#2
In reply to #1

Re: Hydrotest requirements for crude oil distillation column

01/20/2010 3:49 AM

Yes. Also, the foundation is adequate for in-situ hydro.
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Anonymous Poster
#4
In reply to #2

Re: Hydrotest requirements for crude oil distillation column

01/21/2010 3:17 AM

Good - so it can be done if required. I do not beleive that it would be required based on your description (as stated by sv13), but if it is required for some reason remember that this is a fit for service test and you don't need to pressurise to the original pressure test pressure.
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sv13
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Join Date: Jun 2009
Location: Between India & Australia
Posts: 71
Good Answers: 3
#3

Re: Hydrotest Requirements for Crude Oil Distillation Column

01/21/2010 2:16 AM

Minor welding of cleats and pipe supports would not require you to re-hydrotest as long as you are not doing butt welding etc. Have a look in the code to find out.

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