ASME B31.3 Process Piping - Pressure Design of Metals

Pressure Design of Metals

• Design Pressure & Temperature
• Quality Factors
• Weld Joint Strength Factor
• Pressure Design of Components

• Four Methods

• Straight Pipe

• Fittings

• Fabricated Branch Connections

• Flanges and Blanks

• Other Components

• Piping Material Specifications

Design Pressure & Temperature

design pressure: the pressure at the most severe condition of internal or external pressure and temperature expected during service (301.2)

• The most severe condition is that which results in the greatest required component thickness and the highest component rating.
• The inside pipe in jacketed piping shall be designed for the most severe combination of conditions expected during service.
• Short-term variations may be considered separately. (302.2.4)

Provisions shall be made to safely contain or relieve any pressure to which the piping may be subjected.

Sources of pressure to be considered include:

• Ambient influences
• Pressure oscillations
• Improper operation
• Decomposition of fluids
• Static head
• Failure of control devices

FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.