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Engineering ToolBox > Steam Flow Through Orifices

Steam flow through orifices - steam pressure ranging 2 - 300 psi

Steam flow rates can be measured by using orifice plates. The diagram below indicates steam flow rate (lb_s/hr) through orifices ranging diameter 1/32" to 1/2" and 2 - 300 psig steam line pressure.

Downstream pressure equals atmospheric pressure.

• 1 lb/hr = 1.26x10^-4 kg/s
• 1 psi (lb/in²) = 6,894.8 Pa (N/m²) = 6.895x10^-3 N/mm² = 6.895x10^-2 bar
• convert inch to mm