×
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

API 620 and fiberglass

API 620 and fiberglass

API 620 and fiberglass

(OP)
I have a large silo constructed to the API 620 standard which is rated for 3.6 psig MAWP at 176 F.  The top of the silo is 100 ft. up and we have a very heavy 20" 150# manway cover on top that we would like to replace with a fiberglass manway cover to make access easier and also because we would like to mount a new conservation vent on it.  Is this allowed under API 620 as long as the thickness is adequate?  

RE: API 620 and fiberglass

I don't know the answer to your fiberglass question but couldn't you design a thinner flange that will meet your design conditions?  A 20" class 150 blind flange is nearly 1 3/4" thick, you don't need that much metal for 3.6 psig.

RE: API 620 and fiberglass

That's a good point.  However, I think API-620 does specify a minimum design pressure of 50 psi for cover plates, so it won't be as thin as you'd expect.  One of the appendices addresses flange design.

RE: API 620 and fiberglass

Can the customer decide not to have the silo designed to API 620 anymore and then they can design a flange cover how they want?  Obviously you have to ensure it's properly designed for the pressure.

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