I would like to know about Invar.
I'm working for engineering company, and Invar was recommened to transport LNG as a piping material because there is almost no change in its therma expansiion coefficent due to temperatuer change.
The required piping size is 36", but at least it should be min. 24". And the design temp. would be -170 centigrade.
The first thing, I would like to know is that Invar piping can be produced or not. As far as I know, Invar can be produced as plate only. It it is not produced as piping, Is there no problem to make piping with plate by rolling and welding. It it is possible to make 36" size piping, please let me know available information such as company address etc. And I also would like to know Invar is the suitable material in cryogenic service. I want to know its low temperature characteristics comparing with austenitic stainless steel like TP 304 and TP 316. Lastly, I would like to know the price of Invar. Of course, cost information list with other comparing material would be better.
Any kind reply would be highly appreciated.
Thanks in advance.