WELLHEAD FACILITY PIPING-API 6A

[peter vaf]

Dear friends,

Any body has experience about Designing of Wellhead facility piping design (PMS)API6A 10000#

 

[1503-44]

A little.

A black swan to a turkey is a white swan to the butcher ... and to Boeing.

 

[peter vaf]

Dear 1503-44

Thank you for your reply

Please advice Which of them is the best practice :

1-B31.3 CHAPTER IX
2-API 6A
3-ASME SEC VIII DIV 2 PART 5

 

[1503-44]

Basically it is
B31 when your design pressures are less than B16.5 class 2500 allowable.
API when your design pressure are above class 2500 allowables.
ASME VIII for pressure vessels.

API can be used below B16.5 class 2500 ratings, but probably at higher cost. The owner may decide which one to use.


A black swan to a turkey is a white swan to the butcher ... and to Boeing.

 

[peter vaf]

ASME VIII for pressure vessels.====>not only for pressure vessel.....API 6X(6A) Refer to DIV 2&3 also!

 

[LittleInch]

Peter.

I refer to my answers in your previous post

https://www.eng-tips.com/viewthread.cfm?qid=492162

A response to the questions in that post would be good.

Also define "best". Cheapest?

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

 

[peter vaf]

Dear LittleInch

Thank you your supporting.

Also define "best". Cheapest?====>Not Only Cheapest .
I means Practically / Availability and materiality .

My approach is ASME B31.3 CHAPTER IX .

API 6A (6X) method also is practical .But the problem is discontinuity and stress intensity limitation on piping fabrication and welding.

Norsok also has a PMS for piping class 10000#,which material selection of piping is not suitable

https://www.jsc.no/images/norsok/pclass/KX70.htm

A519 AISI 4130==>not easy to welding and commercially is not available in market

 

[1503-44]

Special system requirements take more care, time and money. I have never found a way around that.

If you want the best all-around piping system design, specify B31.3 when you are within 2500 class allowables and API when you are not. I do not use VIII for piping, except for requiring an ASME VIII stamp on pig launchers.

That's about it there guy. All in a nutshell.


A black swan to a turkey is a white swan to the butcher ... and to Boeing.

 

[LittleInch]

I have done it occasionally, but not at 10000 psi.

It created so much trouble trying to locate a choke valve remote from the wellhead that I refused to do it the next time. Why do you want 10000 psi piping on the well head? Horribly thick, huge flanges and bolts and outside many normal design codes.

There's a reason 6A doesn't do piping very well - no one uses it!

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

 

[1503-44]

What is the tree pressure and temperature.
Must be one heck of a well.
Geothermal?

A black swan to a turkey is a white swan to the butcher ... and to Boeing.

 

[GD2]

After the wellhead last block valve, it could be either B31.3 or the pipeline code.

Do you have sketch to show the pressure break points?

GDD
Canada