Mechanical Engineering, Pressure Vessel, Heat Exchanger, Risk Management, COMPRESS, Division 2, Nozzles randy bogard Mechanical Engineering, Pressure Vessel, Heat Exchanger, Risk Management, COMPRESS, Division 2, Nozzles randy bogard

Division 2 Rules Save $ On Nozzle Design

Did you know you can design safer and save money using ASME Division 2 rules instead of Division 1? 

There are many ways to take advantage of the higher allowables and more accurate numerical methods in Division 2. One such method to consider is using the Bildy Rules instead of Area of Replacement for nozzle design. 

Take a look at this simple nozzle internal pressure case:

Design Pressure = 290 psi (2000 kPa)

Design Temperature = 475°F (246°C)

Nozzle Material = SA-106 C Smls Pipe

Nozzle Size = NPS 12 Sch 140

The Division 1 vessel does not pass the design condition of 290 psi (2000 kPa) @475°F (246°C).

The Division 2 vessel passes the design condition of 290 psi (2000 kPa) @475°F (246°C).

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Mechanical Engineering, Pressure Vessel, Heat Exchanger, Risk Management, COMPRESS, Division 2, External Pressure randy bogard Mechanical Engineering, Pressure Vessel, Heat Exchanger, Risk Management, COMPRESS, Division 2, External Pressure randy bogard

Save $ Using Division 2 External Pressure Rules

Can you save money using ASME Division 2 rules instead of Division 1? 

There are many ways to take advantage of the higher allowables and more accurate numerical methods in Division 2. 

Take a look at this simple external pressure (vacuum) case:

Outside Diameter, Do = 60.75” (1543 mm)

Thickness, t = 0.375” (9.53 mm)

Unsupported Length, L = 264” (6706 mm)

The Division 1 vessel does not pass the vacuum condition of 14.7 psi (101 kPa).

The Division 2 vessel passes the vacuum condition of 14.7 psi (101 kPa).

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