Dismantling Joint Dn1700 PN6 in Carbon Steel

[RaghaDe]

Hello,
We have got inquiry for Dismantling Joint DN1700 PN6.
Since DN1700 is not usual size for Flanges, can someone suggest how to measure flanges and pipe for this size?? The Material is Carbon Steel.

 

[LittleInch]

I would guess half way between 1600 and 1800?

EN 1092-1 has dimensions for all these, but this looks like a one off.

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

 

[rconner]

Not sure exactly what you mean by this inquiry (along with the perhaps odd size of the flange mentioned). One may however be able to "measure" an existing flange, even if it is assembled in an existing pipeline, e.g. by throwing a circumference tape measure around the outside of same, and its shroud (assuming it has the latter), and also using a linear tape measure axially (with or without a square) to look at its axial thickness, diameter and lengths of bolts, point to point and flat to flat distance of bolt heads and nuts etc. Make effort to approximate bolt center (diameter) by measuring from the outside in. Count number of bolts etc?
All this being said, and once you think you know what you have, you may still be surprised as I have seen some particularly old flanges over the years that don't even have e.g. equally spaced bolting (in those cases making a paper "template" laid/marked over existing flange face may be best way to go, to provide something that has a chance to bolt up to same!
And/or, you may want to have a look at say the last page at

http://globalsupplyline.com.au/wp-content/uploads/2014/10/FlangeBS10AS2129ANSIBS4504.pdf

, that does refer to 68"/1700 mm flanges.