We are preparing a material list for a low temperature service (-40 degree C) due to natural gas choking downstream a drain valve. We need to choose the accepted material to suit this application other than ASTM A105. Is there any reference standard which explains the material temperature limitation for low temperature service?
Mohamed,
Are you looking for metals, polymers, or composites?
And -40°C is not too challenging - what is the coldest temperature that the part has to endure in your design?
You can see ASTM A240 ( AISI304, AISI 304L, AISI, 304LN) for plate and for other ASTM grade are different. Pls. see ASME section IX by P No's
Thanks
Take a look at A333, it provides ten different materials that are acceptable at -40C. Grades 3 and 6 are the ones that are most frequently used for the type of service that you describe.
You need to take a look at ASTM A333. This document lists 10 different materials that are suitable for use at -40C. The most common materials for the application that you list are Grade3, which is a 3% Ni steel and Grade 6, which is a Charpy tested carbon steel. 304 and 316 stainless are also suitable for low temperature applications if they are strong enough and cost effective for your application.
Thanks to all
My application is rerouting a pipeline to another location , however if i use ASTM A333 what is the limitation for maximum working design pressure ,because this line includes flanges with class 150 and others with class 1500 ( the pipeline includes a choke valve ,where the valve upstream pressure is high pressure and downstream is low pressure)?
A333 Gr 6 is a carbon steel that is charpy tested for impact strength at -45C. It is essentially the same carbon steel that you are using elsewhere with your facilities except for the charpy testing requirement. Therefore, from a pipe sizing standpoint, there is no difference from what you have been doing.
If you are using flanges, then you also need to be concerned about the purchase specifications. They will also need to be specified to have the appropriate low temperature toughness for your application.
The common carbon steel , generally we use is ASTM A105N Gr B. So is it the same group as ASTM A333?
As far as the boiler code is concerned, Grade B and Grade 6 are the same group. You might even be able to get away with using the same welding procedures, but that depends upon how your Grade B procedures are written.
You are right, but is there any difference with refer to pressure-temperature rating between A 333 and A 105?
THIS IS GOOD QUESTION SO AS THE PREVIOUS PEOPLE MENTION A333 WITH VARIOUS GRAD SO THIS LIMITED TO -42 C AND COULD BE SUITABLE FOR LPG BUT NOR TO LNG ,
FOR LNG U NEED ANOTHER DIFFERENT OF MATERIALS BECAUSE CRYGONIC TEMPERTURE MAY BE -165 SO U CAN DO ON A304 L,316,321 AND 347 AND ALSO 9 % NICKEL STEEL AND 7 PERCENT ALSO THERE IS NEW DEVLOPED MATERIALS BUT ALL MENTION ABOVE SUITABLE FOR THIS
Please look at ASME B31.3 Code Table A1 for minimum design temperature of materials. But Low temperature carbon steel ASTM A350 LF2 is very common forging carbon steel rather than A105.
Article Review on development of effective carbon fiber based cryoge...
https://www.tandfonline.com/doi/abs/10.1080/2374068X.2022.2072085?journalCode=tmpt20
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