ASME B16.5 Hub Outside Diameter at Bevel End - Upper Tolerance Limit
ASME B16.5 Hub Outside Diameter at Bevel End - Upper Tolerance Limit
(OP)
Dear Group Members,
I have following query related to subject post
Design Code : ASME Sec.VIII Div.2
Design Pre : 320 bar
Design Temp : 85 Deg C
Inside Diameter (ID) : 187.3 mm
Cylinder Required Thickness is : 24 mm
Material of cylinder : SA 350 LF2 CL1
Material of attached flange : SA 350 LF2 CL1
Pressure rating : 2500#, ASME B 16.5
Equipment : Pig Launcher
Due to specific inside diameter (ID) requirement cylinder outside diameter (OD) is coming = 187.3+24+24 = 235.3 mm
But B 16.5 STD. hub outside diameter at bevel end shall be not larger than the 219.08.
Query :
If we increase hub outside diameter at bevel end to 235.3 mm to match the same with cylinder OD keeping all other dimension as per B 16.5.
Still can we qualify this flange standard flange as per B 16.5 or it will be custom design flange and need to be perform thickness calculations?
What is tolerance limit of deviating from STD. OD of 219.08?
I have following query related to subject post
Design Code : ASME Sec.VIII Div.2
Design Pre : 320 bar
Design Temp : 85 Deg C
Inside Diameter (ID) : 187.3 mm
Cylinder Required Thickness is : 24 mm
Material of cylinder : SA 350 LF2 CL1
Material of attached flange : SA 350 LF2 CL1
Pressure rating : 2500#, ASME B 16.5
Equipment : Pig Launcher
Due to specific inside diameter (ID) requirement cylinder outside diameter (OD) is coming = 187.3+24+24 = 235.3 mm
But B 16.5 STD. hub outside diameter at bevel end shall be not larger than the 219.08.
Query :
If we increase hub outside diameter at bevel end to 235.3 mm to match the same with cylinder OD keeping all other dimension as per B 16.5.
Still can we qualify this flange standard flange as per B 16.5 or it will be custom design flange and need to be perform thickness calculations?
What is tolerance limit of deviating from STD. OD of 219.08?
Static Equipment Engineer





RE: ASME B16.5 Hub Outside Diameter at Bevel End - Upper Tolerance Limit
But unless you have some kind of high external loading condition that's driving your OD that large, I would think your design calcs can refer back to B16.5 as the design basis without need for further calculations. That would be an engineering judgement, I would think.
RE: ASME B16.5 Hub Outside Diameter at Bevel End - Upper Tolerance Limit
Regards,
Mike