Pipe Sizer - Pipe Sizing Chart

Pipe Sizer is an interactive log-log pipe sizing chart based on the Hazen-Williams equation, made for engineers and technicians who size water piping: plumbing, condenser water and chilled water systems. Tap the chart to read values instantly • Flow, friction loss and velocity on the nearest pipe size • Shows whether the point is inside the design zone (too slow, too fast, or over the friction limit) • Double-tap to fix a flow rate, then slide one finger to compare pipe sizes at that flow • Pinch with two fingers to zoom and pan Pipe catalogues • PVC to Thai standard TIS 17-2532 (classes 5, 8.5, 13.5) and PVC Sch40/80 (ASTM D1785) • PPR, HDPE (PN4–PN25), steel Sch40/60/80, GSP (BS 1387), CPVC and PB • Inside diameters are calculated from each standard's wall thickness Fits your project • Open system (C = 100) and closed system (C = 140), or enter your own C factor • ASHRAE STYLE and CARRIER STYLE (Carrier open-piping chart values for steel pipe) • Flow in gpm, L/min or m³/h; friction loss in m/100m, ft/100ft, Pa/m or kPa/m • Adjustable design zone: minimum and maximum velocity, small-pipe limit and maximum friction loss • Dark mode, automatic or by choice • Thai, English and more than 30 other languages Compressed air and steam (new in 1.4.0) • Compressed air: sizing chart by working pressure, separate main-header and branch limits; steel, galvanized, copper and PPR; L/s, m³/min, m³/h, CFM • Saturated steam: sizing chart by pressure, with saturation temperature and the heat carried; kg/h, lb/h, t/h • Darcy-Weisbach with the Colebrook friction factor, per ASHRAE Fundamentals Pipe insulation (new in 1.4.0) • Chilled water: anti-condensation thickness from water and air temperatures and humidity (ASHRAE dew point) • Steam: thickness that keeps the outer surface below a set limit, with the heat loss • Check an existing thickness · 7 insulation materials · jacket choice Works offline. No sign-up, no ads, no personal data collected. Developed by EZYHVAC Co., Ltd. in collaboration with University of Phayao. Note: results are estimates for preliminary design. Always check against the applicable standards and the pipe manufacturer's data.