Looking for ASME equivalent to G40.21-44W plate? 3

[drafty37]

I've designed a 26"-300# knife gate valve and am required by Alberta's Boiler and Pressure Vessel safety association to identify all materials by ASTM/ASME specifications. I come from an industry where all I know is ANSI designations ie. 4140 HTSR, C1026, etc.

I've managed to nail down 90% of the component materials with ASME specs, thanks to this forum and other resources, but I am completely stumped on this structural plate. Normally, I would specify A-36 plate, but to my knowledge any plate over 2" thick becomes G40.21-44W structural plate.

The component is a spacer ring between the valve body and the flange (I'm using A-105 for the flange and A516 Gr. 70 for the valve body plate). The ring dimensions are 30.25" OD x 26.25" ID x 4.50" thk. I opted to flame cut or water jet the rough ring out of plate and then machine to finish dimensions.

If anyone knows of an ASTM/ASME spec that would apply here I would be eternally grateful (it must be a weldable grade steel).

Thanx again

 

[Yallapragada1022]

You may want look at this pdf. I am not really sure if this is what you have been looking for.

http://www.algoma.com/media/sheet.pdf

CSA G40.21 38W (280W)
ASTM A1011-SS Grade 36 Type 1 and Type 2, ASTM A907 Grade 3

Hope this helps.

Rao Yallapragada

 

[GrimesFrank]

Pulling from the back of my brain;

For pipe supports; CSA G40.21-44W can be substituted for SA36 except in elevated temperature applications (value escapes me right now).

I have never heard of using A36 (G40.21) in valve construction. You might want to review that.

Frank "Grimey" Grimes
You can only trust statistics 90% of the time.

 

[chaulklate]

The material spec in question is already ASME certified. Refer to ASME Section II Part A (page 1637 of my edition)and you will find the spec you are looking for titled SA/CSA-G40.21. If you call off the material accordinlgy, you should have no more problems.