A182 F316/316L 300# flange press/temp rating 2

[nonic]

I have come across p/t charts indicating different p/t ratings for F316 and F316L (720 psi and 600psi up to 100 F) what specification governs these ratings?
When a flange is supplied with the dual grade of 316/316L which pressure rating would apply?
Are there any p/t charts indicating p/t ratings for flanges that are dual grade, showing a column within the chart indicating dual grade 316/316L?
Or where would one find documentation indicating which pressure to use with a flange with dual grade markings?

Any and all replies will be greatly appreciated, details would be great.

Thanks

 

[StevenHPerry]

ASME B16.5.

For dual grade material, see paragraph 2.9.

- Steve Perry

http://www.linkedin.com/in/stevenhperry

This post is designed to provide accurate and authoritative information in regard to the subject matter covered. It is offered with the understanding that the author is not engaged in rendering engineering or other professional service. If you need help, get help, and PAY FOR IT.

 

[Duwe6]

For dual-certified material, you get "the best of both worlds". You get the weldability of the 'L'-low carbon grade, and the strength of 316(plain).

Choose your Weld Procedures based on the 'L' rating. Calculate strength-at-temperature using the 316(plain) p/t chart.

 

[nonic]

Thank you gentlemen. That was all a big help.

 

[donf]

Also, per ASTM A182 18.1.4: "Parts meeting all requirements for more than one class or grade may be marked with more than one class or grade designation....."