Steam Flow through holes in a pipe

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SUMMARY

The mass flow rate of dry saturated steam through holes in a pipe with an internal diameter of 25mm and steam pressure of 3 kg/cm² can be calculated using principles of orifice flow and choked flow. The presence of five holes, each with a diameter of 3mm, necessitates consideration of the pressure drop in the pipe, especially if it is long, as indicated by the Moody chart. The application of this setup is in a steam bath device used for conditioning fabric, where steam is supplied through a pipe with specific configurations.

PREREQUISITES
  • Understanding of orifice flow principles
  • Knowledge of choked flow dynamics
  • Familiarity with the Moody chart for pressure drop calculations
  • Basic concepts of steam properties and behavior
NEXT STEPS
  • Research orifice flow equations for steam applications
  • Study choked flow conditions in gas dynamics
  • Learn how to use the Moody chart for calculating pressure drops
  • Explore steam conditioning processes in industrial applications
USEFUL FOR

Engineers, process designers, and technicians involved in steam system design, particularly those working with fabric conditioning and steam flow management.

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TL;DR
What will be mass flow rate of dry saturated steam through holes on a pipe.
What will be mass flow rate of dry saturated steam through holes on a pipe. Pipe ID: 25mm, Steam Pressure 3 kg/cm^2, Holes' Dia: 3mm, Number of Holes: 5.
 
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Is this a homework problem? Is there any restriction downstream from the holes? What is your background? What have you tried so far?

Search engine is your friend. Start with orifice flow, then search choked flow. If the 25 mm pipe is very long, search Moody chart or Moody diagram to calculate pressure drop in the pipe to find steam pressure at the holes.
 
We have a steam bath device in our company.
In this device, we feed a fabric in tape form by 2 set of rollers. Between the rollers we expose the fabric to steam (by a steam pipe directly beneath the fabric) in order to condition it.

The pipe is about 200mm long. When we switch on the rollers, we switch on the steam too by a ball valve. The pipe is closed at one end and other end is supplied with steam. All 5 holes are 40mm apart.
 

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