LWN Forged Flanges Required Nozzle Calculations

Mechanical EngineeringPressure VesselHeat ExchangerRisk ManagementCOMPRESSNozzlesLWNASME
Written By randy bogard

Are you performing the required calculations for your LWN forged flanges? 

Long Weld Neck LWN Flanges Require Calculations

LWN forged flanges are popular among Owner/Operators because the ASME Codes offer some calculation exemptions. However some Owner/Operators have started to believe that LWN forged flanges are exempt from all calculations. This is a dangerous trend as LWN forged flanges are not automatically acceptable at their designated ASME B16.5 flange pressure rating classification. Yes, LWN forged flanges do have some similar exemptions as ASME B16.5 flanges but a full nozzle calculation must still be performed at the nozzle-to-vessel intersection.

randy bogard
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