Re: Double Block and Bleed Isolation

From: <Alok>
Date: Wed Dec 13 2006 - 10:12:00 EST

Hi Utama,
If you ar etalking double block and bleed assemby than normally these are vendor specfic items and used in instrument relate dinterface where postive isolation is required because of hazard associated with loss of containment.They are normally small bore items till 3'''. they are typically two ball valve and a drain in between normally of 1/2"or 3/4". their weight and length are major criteria i.e it should be compact and less bulky. If you are using ball valve type of DBB then probably best guidance code will BS 5351 for valve design.
Hope this helps.

Cheers!

• Original Message ---- From: "Satria, Utama" <satria.utama@se1.bp.com> To: PipingDesign@yahoogroups.com Sent: Tuesday, December 12, 2006 6:15:15 AM Subject: [PipingDesign] Double Block and Bleed Isolation

Dear Fellows ;

Any idea what Int'l Code or Regulation that covers requirement of double block and bleed isolation for equipment maintenance ? They preferably applicable Internationaly such API, ISO, OSHA, etc. But UKOOA,BS, EN, NORSOK also considerable.

Appreciate if you can return to me a.s.a.p.

Best Regards,

Satria Utama Relianto
Mechanical Engineer
Integrity Management
Engineering Support
BP Indonesia Business Unit
< email : satriau@bp.com >
Telp. + 62 ( 21 ) 78548451
Fax. + 62 ( 21 ) 78549062

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Received on Wed Dec 13 10:12:00 2006