Steam line sizing is an essential aspect of designing a steam distribution system to ensure that the right amount of steam reaches the intended destinations. Proper sizing helps maintain optimal efficiency and prevents issues such as condensate buildup, inadequate heating, or excessive pressure drop.
Step 1 - Pipe Sizing for Steam
Pipe Sizing for Steam formulas |
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\(\ d = \sqrt { \dot m_f \; 28.8 \;/\; p_d } \) (Pipe Sizing for Steam) \( \dot m_f = Q \; 2440 \;/\; \Delta H \; n \; 1000 \) (Steam Flow Rate) \( v_s = \dot m_f \;/\; \rho_s \; A_c \) (Steam Velocity) |
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| Symbol | English | Metric |
| \( d \) = pipe inside diameter | \(in\) | \(mm\) |
| \( \dot m_f \) = steam mass flow rate | \(lbm\;/\;sec\) | \(kg\;/\;s\) |
| \( p_d \) = pressure drop | \(lbf\;/\;in^2\) | \(Pa\) |
| \( Q \) = heat load | \(Btu\;/\;lbm\) | \(kJ\;/\;kg\) |
| \( \Delta H \) = enthalpy difference | \(Btu\;/\;lbm\) | \(kJ\;/\;kg\) |
| \( \eta \) (Greek symbol eta) = overall efficiency | \(dimensionless\) | \(dimensionless\) |
| \( v_s \) = steam velocity | \(ft\;/\;sec\) | \(m\;/\;s\) |
| \( \rho_s \) (Greek symbol rho) = steam density |
\(lbm\;/\;ft^3\) |
\(kg\;/\;m^3\) |
| \( A_c \) = pipe area cross-section | \(in^2\) | \(mm^2\) |
Step 2 - Pipe Sizing for Steam with Adjustment for Slope, Fittings, and Valves
pipe sizing for Steam with adjustment for Slope, Fittings, and Valves formulas |
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| Symbol | English | Metric |
| \( d \) = pipe inside diameter | \(in\) | \(mm\) |
