European vs Ansi
European vs Ansi
(OP)
Will a Flange with European Spec. replace a valve with 150 ANSI spec.?
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RE: European vs Ansi
By European spec, I assume you mean an PN rated flange. A direct replacement is not physically possible as the design of the two types of flanges is not the same and they don't match. you can sometimes use a flange adaptor where a plate with a hole in it has two different sets of stud bolts welded to the different sides, but they look terrible and the strength of them is often questionable.
However, if you replace an entire flange set or flanges and valve, this can be accomplished providing that the design pressure of the system is equal or lower to your now new flange rating. Eg if a design pressure is 16 barg or less, you could replace a class 150 flange set with a PN 16 rated flange set. You might need to use the next rating up which is higher than the ANSI class rating to do this.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: European vs Ansi
Maybe I wasn't clear with the question.
Can You connect a valve with European DIN Spec, with a flange ANSI 150? Will the bolt holes match just to fit the bolts and achieve a connection?
RE: European vs Ansi
There might be one or two sizes / ratings which are close, but in general no you can't, without, as said earlier, a horrible flange adaptor plate.
why can't you get the same flange?
If you search on this site you find things like this
http://www.eng-tips.com/viewthread.cfm?qid=346371
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: European vs Ansi
REGARDS
RE: European vs Ansi
Best solution is to determine the needed pressure and service ratings, then make a very short (1 - 2 feet/half-meter or less) transition piece with an ANSI flange on one end and the EU flange size on the other.
This then bolts to the valve or flange safely on both ends.