Gaskets for tongue and groove flange

[Jaivishnu]

Hi
I am a newbie piping field engineer. I would like to know if standard dimensions of gaskets for Tongue and Groove flanges (ASME B 16.5)are listed in any of the ASME standards. I found that ASME B16.20 is for metallic gaskets and B16.21 is for non metallic gaskets but did not find any mention of gaskets for T&G configuration. Any guidance will be appreciated.

 

[mk3223]

Link of Flexitallic serial wound gasket which is based on the B16.5 dimensions.

https://flexitallic.com/wp-content/uploads/product-documents/global/Spiral Wound Gasket Brochure.pdf

 

[Jaivishnu]

Hi, mk3223
Thanks, also, do you happen to know if there is any pressure class restrictions on Tongue and groove flanges,like it cannot be used above certain pressure ratings

 

[mk3223]

The Code doesn't specify the limit of the pressure rating based on the flange face type.
IMO, it may depend on the O&M experience. Because no evident benefit, I did replace the old T&G flange with RF flange with spiral wound gasket in the past.