Minimum vessel OD for the requirement of manway

[engr2GW]

Hello,

I have seen MANY ASME coded vessels (separators) in the oilfield upto and sometimes more than 48" without manway. I was recently told that manway is required above 36".
Any thoughts, advice, insight, or experience on this will help.
My applications does not need any cleanout for the most part, but I want to be able to do atleast the minimum required
Thanks in advance

ASME BPVC VIII-1 2017, page 55, number 2 and 3.

As much as possible, do it right the first time...

 

[SnTMan]

I was recently told that manway is required above 36".

Told by who? Required by who? Sometimes nozzle or body flanges can serve.

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[LittleInch]

Many company specs and designs may mandate this, but I don't think there is a particular code requirement.

It's up to you depending on entry requirements, cleaning, inspection / repair and how big your other nozzles are and what access they permit.

for a 48" vessel it had better be a pretty small "man"

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[r6155]

See ASME VIII Div.1 (2019)UG-46 INSPECTION OPENINGS.

Regards

 

[MJCronin]

Remember, the intention of the ASME code is to allow access to the interior of the vessel for inspection...

It is NOT TO GET A MAN INSIDE OF THE VESSEL AT ALL COSTS

Inspection can be done through judicious placement of small "thief hatches", inspection hatches and additional flanges at large nozzles.

Expensive "full body flanges" are sometimes used ...

https://www.eng-tips.com/viewthread.cfm?qid=409104

MJCronin
Sr. Process Engineer

 

[engr2GW]

ASME BPVC VIII-1 2017, page 55, number 2 and 3.

As much as possible, do it right the first time...

 

[r6155]

engr2GW
Please. Don't waste my time.
ASME 2017 is a old edit.

Regards

 

[david339933]

Number 4 is the one you want. "Non-Corrosive Service".

 

[XL83NL]

The OP is on the ASME-track. If this question would’ve been asked for EN 13445, then there is a code requirement for inspection openings, depending on the vessel size. This requirement is quite different from ASME.
But that’s a different cookie ha

Huub