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Re: [MW:10888] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services

By Materials & Welding

Dear Mr Krishnakumar,

 

To standardize the pipe flanges for sizes NPS 26 to NPS 60 for class 75 through to Class 1500 ASME B 16.47 was developed . At that time it was decided to include the flange dimensions as per MSS SP 44 flanges except Class 75 which are ASME/API 605 flanges. Since the dimension of these two classes of flanges were not compatible with each other it was decided that  MSS SP 44 flanges are B 16.47 Series A flanges and  API 605 flanges are designated as B 16.47 Series B flanges.

 

Standards followed:

  • ASME B 16.5 : UP TO SIZE NPS 24
  • ASME B16.47 SR.A / SR.B : UP TO SIZE NPS 60 (for rating150& 300)
  • AWWA C-207 : UP TO SIZE NPS 144 (without Hub) & UP TO SIZE NPS 96 (With Hub) - Pls. refer this standard while giving reference of this for any size.

Other member may offer their comment, 

 Vinod

--- On Fri, 4/29/11, Krishnakumar M S <krishnakumarms01@yahoo.com> wrote:


From: Krishnakumar M S <krishnakumarms01@yahoo.com>
Subject: [MW:10880] Comparison of Large Dia Flanges (B16.47 series A & B) in Refinery services
To: materials-welding@googlegroups.com
Date: Friday, April 29, 2011, 10:46 AM

Hi,

I have to use 30", 42", 48" pipes in Cude Oil, Naphtha, HSD and CRWS services.
What is the criteria between the series A & B for ASME B16.47. Regarding no. of bolts, enonomy, availability etc.
If anyone to know this please.

Regards

Krishnakumar
Fact Engineering & Design Organisation (FEDO)
Cochin, India

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