INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!

*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.

Jobs

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

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

(OP)
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

Background;
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.

Query
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:
http://www.woodcousa.com/about_wnf.htm
http://www.woodcousa.com/q_a-r_16.htm
http://www.woodcousa.com/q_a-r_37.htm
http://www.woodcousa.com/q_a-r_45.htm

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

(OP)
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!


Resources


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