×
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!
  • 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

Jobs

ASME Section VIII Div 1 UG 44 & ANSI B 16.47 for A 105 Material

ASME Section VIII Div 1 UG 44 & ANSI B 16.47 for A 105 Material

ASME Section VIII Div 1 UG 44 & ANSI B 16.47 for A 105 Material

(OP)
As per ANSI B 16.47 clause 2.6 "Ratings for CS bored welding neck flanges are based upon their hub at the welding end having thickness at least equal to that calculatedfor pipe having 40.0 KSI specified minimum yield strength."

As per ASME SEC VIII Div 1 (UG 44) if the  flanges are standard design then calculation is not required so long as the allowable stress suits the tables given in the standard.

Carbon Steel Forgings A 105 does not have yield as 40.0 KSI.

Is it necessary to design flanges  as per appendix 2 of ASME even for Standard (B16.47)  flanges under this circumstance.

RE: ASME Section VIII Div 1 UG 44 & ANSI B 16.47 for A 105 Material

Nope, what that refers to is the pressure-temperature rating tables (in the case of A-105 that's Table 2-1.1) are based on the thickness of the hub at the weld end being the minimum required for 40 ksi pipe.  The bore on your flange is bored to match your pipe bore.  Wall thickness of your piping is based on the actual pipe's spec SMYS, which would usually be less than 40 ksi (A-106B and A-333 Grade 6, for instance, are 35 ksi).  That means, the wall thickness required on your flange to match your pipe is going to have to be thicker than the thickness used to arrive at the standard pressure-temperature tables.  A-105N has a SMYS of 36 ksi, meaning with equal wall thickness, it can handle a higher pressure than 106B or 333 Gr 6 pipe.

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