Type of Piping Systems in Piping Design

Find out major types of Piping Systems being implemented in Piping Design:

Based on Design Temperature and Pressure

• Critical
• Main steam piping, HP Bypass system
• Hot Reheat System, Cold Reheat System and Low Pressure (LP)
• Bypass System
• Boiler Feed Water piping
• Turbine Extraction system
• Steam piping to Turbo driven Boiler Feed Water pump.
• Condensate piping
• Auxiliary steam piping.
• Any system with a design temperature of 400 deg C or higher.
• Any system with an ASME flange rating of Class 900 or higher
• Other systems which are considered critical because of pressure
• and/or Temperature Considerations.
• Non Critical
• Exclusive of all above

Based on Size

• Small Bore
• Pipe Diameter less than 65 NB
• Large Bore
• Equal and greater than 65 NB)

Stress Analysis To be carried out:

• High Pressure and above 120 deg C either LB or SB
• SB above 120 deg C

Loads on Piping System

• Dead load
• Weight of the pipe.
• Weight of fittings.
• Weight of valves and other inline components like strainers, etc.
• Weight of insulation.
• Weight of fluid flowing inside
• Wind load
• Seismic load
• Hydro Test Loads
• Load Due to Thermal Expansion

WHAT MAKES STEAM PIPING CRITICAL

• High Temperature and High Pressure of the Steam
• Additional Loads on a Steam Line:-

Increased dead load due to higher insulation.
Thermal loads.
Loads due to the phenomena of water hammer/steam hammer.
Relief valve discharge.
Loads due to phenomena of surging.

• Temperature
• Movement of Equipment Nozzles
• Solar Radiation Heating

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