Vent and drain hole location on casing pipe
Vent and drain hole location on casing pipe
(OP)
Hello,
What is the basis of keeping vent and drain hole location on casing pipe in between second and third spacer?
please refer attached pdf file in below link for more clarity.
What is the basis of keeping vent and drain hole location on casing pipe in between second and third spacer?
please refer attached pdf file in below link for more clarity.





RE: Vent and drain hole location on casing pipe
http://www.pipelinepsc.com/images/documents/PDF/Br...
RE: Vent and drain hole location on casing pipe
Note that casing can be filled with corrosion inhibitor or inert gas, if no vents are used.
50 m of casing to either side is pretty far. Normally it could be cut off much nearer to and on the outside edge of the road's right-of-way boundary.
You should have a look at API 1102.
Learn from the mistakes of others. You don't have time to make them all yourself.
RE: Vent and drain hole location on casing pipe
I've never liked casings, but the design of the "drain" is laughable. No driving force so how exactly is any water going to get out? And I've never seen a slope on a casing before. If you think a railway company is going to let you put a big casing pipe 2m below their precious rails you've got a big shock coming....
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Vent and drain hole location on casing pipe
2m = 6.56', so that's usually true too, but I used to cross the BN often, so I remember that they only need 5-1/2 feet below track. :-)
http://www.bnsf.com/communities/faqs/pdf/pipeline....
Learn from the mistakes of others. You don't have time to make them all yourself.
RE: Vent and drain hole location on casing pipe
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Vent and drain hole location on casing pipe
Learn from the mistakes of others. You don't have time to make them all yourself.