Flow through perforated pipe

Manufacturers of perforated pipe are often able to provide the open area (m^{2</sup) per meter length.}

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle Q_{max, p}=B\times C_{d}\times A_{o}\sqrt{2\cdot g\cdot \left ( d_{p} + d_{m} \right )}}