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- Maximum velocity
- Maximum pressure drop per square meter
- Target pressure drop per square meter
Both velocity and pressure loss serve as 'hard' filtering criteria. A pipe diameter is NEVER selected when the pressure loss is larger than the maximum, or the velocity is larger than the maximum velocity. When target pressure losses are supplied, the pipe diameter is selected from the set of diameters that are allowed (by the above criteria), and which has the smallest deviation from the target pressure loss. Summarized this means: when both are supplied the most restrictive is applied and a "0" value is ignored.
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At this moment our software only supports pipe sizing based on the maximum velocity, the maximum pressure drop per square meter, and the target pressure drop per square meter. However, in the Cibse guide, the pipe sizing is done on typical (or target) velocity.
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