Allowables in Stress

Hello friends, thanks for sharing your views .

My this query is related to Allowable Nozzle Loads in various equipments.

For certain equipment's like Pump, Compressors, Turbine ,Aircooler, Heater the Allowable Nozzle loads and Moments are given against Nozzles Nominal Bore, where as for equipments like Vessels, Column, Heat Exchangers, Drum the Allowable Nozzle loads and Moments are given against Nozzles Nominal Bore and Flange Rating.

Example: According to NEMA -SM23 quotes the allowable for nozzle (individual and combined ) equivalent diameter only example for turbine it is 3F+M<= 500Dr}

Similarly API 610 quotes the Nozzles Loads for given Diameter only.

My queries are

1. what are the criteria for calculating the nozzle allowables.
2. why only dia is considered as factor for comparing with force and moments in above mentioned equipments.

Regards

Animesh Singh . Received on Sat May 04 04:25:00 2002