Bolt length 2

[Weldinspect]

Acording to an API 650 for a plant, what bolt lentgh is accepted on flanged connections, how many threads outside the nuts?

 

[MJCronin]

API-650 has nothing to do with bolt/stud length

Please at least make a weak attempt to read these standards before posting a question

This matter is up to the purchaser and indirectly addressed in the ASME/ANSI flange standard referenced within API-650

Here is something:

http://www.cavcovalve.com/Resources_files/ANSI Flange Bolt & Stud Chart.pdf

I used a search engine called "GOOGLE"

-MJC

 

[jbeckhou]

Typically 2 threads should be out side of the nut. Check out AWHEM's website. They have a spec for OAL of studs and nuts. Also API-6A provides OAL for FLG X FLG connections.

Petrotrim Services

 

[Weldinspect]

MJC, thank you for the correction, maybe I should had asked for API only. Thanks jbeck I will look at API-6A

 

[Weldinspect]

jb:
API 6A aplies to wellheads and christmas trees:

1.1 Purpose
This International Standard specifies requirements and gives recommendations for the performance, dimensional
and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing,
shipment, purchasing, repair and remanufacture of wellhead and christmas tree equipment for use in the petroleum
and natural gas industries.

Also I checked AWHEMS website, my problem is usually to make my contractor to do things thta are not in the contract or the standards... but finally they are making the correction, thanks a lot