Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


API 6A type 6BX flange dimension and integral transition piece.

API 6A type 6BX flange dimension and integral transition piece.

API 6A type 6BX flange dimension and integral transition piece.

Hi members

Refernce: API 6A type 6BX 10K PSI flange
Flange SIZE RANGE: 4-1/16, 11, 13-5/8.
Pipe size: NPS 4, 14, 16 respectively ASME B36.10

API 6A 2010 does not recommend transition pieces to match flange 'small diameter of hub J2' with ASME B36.10 PIPES. However the total length of flange is also no finalized in API 6A.

1. Why does code does not finalize total height of flange.
2. What is the significance of indicating minimum 6mm after length of hub J3. i.e who will finalize the length and based on what parameters.
3. Why was the requirement of transition pieces removed from API 6A to match pipe OD.
4. Can a API 6A type 6BX 10k PSI flange ends be tapered to match ASME B 36.10 pipes as per API RP 14E APPENDIX B without using transition piece. (Can API 6A-monogram be used for the flange after tapering?)

Please share ur opnion/experince.
Thanks in advance

RE: API 6A type 6BX flange dimension and integral transition piece.

1. Spec 6A allows purchasers and manufacturers to agree on the final length of the flange.
2. Any length 6mm or longer is sufficient. It is up to the purchaser and manufacturer to agree on the length based on their design requirements and/or their stock.
3. You'd have to ask the committee that made the change.
4. The flange ends can be tapered to match the pipe sizes, but then the manufacturer has to do design calculations to ensure that it is suitable for the rated pressure and it generally could not be API 6A monogrammed. To apply the API 6A monogram, all API 6A requirements must be met, including all dimensional requirements. Therefore, if you change the flange end so that it doesn't meet the API 6A requirements, it cannot be API monogrammed.

Some information that might be helpful to you is available from an API 6A equipment manufacturer at the following links:

RE: API 6A type 6BX flange dimension and integral transition piece.

Can u share any calculation/technical write-ups that u have received from vendor.

Thanks for the ref.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close