pressure rating

[stan000]

what is maximum pressure class rating for SA 105 NPS 4' SLIP ON FLANGE.
MY Understanding TABLE F2-1.1 PRESSURE TEMP RATING FOR GROUP 1.1
CLASS 300 Shows 740 AT -20 to 100.
please advice.
regards
stanly

 

[LittleInch]

Question isn't phrased well.

Max pressure for a class 300 material group 1.1 flange to ASME B 16.5 is indeed 740 psig between -20 to 100F

"what is maximum pressure class rating" isn't clear what you're asking.

I don't think slip on flanges are not normally recommended above class 300 if that's what you mean, but they make them in theory up to class 2500

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[stan000]

thanks for reply
i was asked
what is maximum class rating for NPS 4" - SLIP ON FLANGE CLASS 30

 

[stan000]

what is maximum class rating for NPS 4" - SLIP ON FLANGE CLASS 300.

 

[stan000]

i think class 300 slip on flange maximum pressure rating is 740 psi.
please advice.

regards
stanly

 

[LittleInch]

I've already stated what the maximum pressure is above

"Max pressure for a class 300 material group 1.1 flange to ASME B 16.5 is 740 psig between -20 to 100F"

This is Max working pressure. ASME B 16.5 flanges are good for a hydrotest of 1.5 times this.

There is no difference whether it's a weld neck or slip on flange when it comes to pressure rating.

This is freely available information and I would recommend you obtain a copy of ASME B 16.5 for more information.


Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[stan000]

Yes , thanks for confirming.
stanly

 

[moltenmetal]

Yes, a 300# slip on flange is still a 300# flange and has the same rating as any other 300# flange- weld neck, lap joint, blind etc.