Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! Pressure loss nomogram for hot water steel pipes.
Pressure loss in hot water steel piping systems can be estimated from the nomogram below:
The heat flow is based on temperature difference
20. oC 1 Pa = 10 -6 N/mm 2 = 10 -5 bar = 0.1020 kp/m 2 = 1.02x10 -4 m H 2O = 9.869x10 -6 atm = 1.45x10 -4 psi (lbf/in 2) 1 kW = 1,000 Watts = 3,412 Btu/h = 737.6/550 British hp = 1.341 British hp = 10 3/9.80665 kg f m/s = 737.6 ft 1 liter/s = 10 -3 m 3/s = 3.6 m 3/h = 0.03532 ft 3/s = 2.1189 ft 3/min (cfm) = 13.200 Imp.gal (UK)/min = 15.852 gal (US)/min = 792 Imp. gal (UK)/h 1 m/s = 3.6 km/h = 196.85 ft/min = 2.237 mph m (meter) = 3.2808 ft = 39.37 in = 1.0936 yd = 6.214x10 -4 mile Example - Pressure Loss in a Hot Water Heating Pipe
The pressure loss in a
2" BS 1387 hot water heating pipe with heat flow 100 kW can be estimated as indicated below
With temperature difference 20 the water flow is oC 1.2 liter/s The flow velocity is 0.54 m/s The pressure loss is 60 Pa/m Related Topics Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more. The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time. Heating systems - capacity and design of boilers, pipelines, heat exchangers, expansion systems and more. Related Documents Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes. Pipe sizes, inside and outside diameters, wall thickness, schedules, moment of inertia, transverse area, weight of pipe filled with water - U.S. Customary Units. Calculate gravity and forced circulating hot water heating systems. Dimensions and weights of steel tubes according BS EN 10255. Properties like freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines. The density difference between hot and cold water is the circulating force in a self circulating gravity heating system. Calculate flow rates in heating systems. Safety valves with boilers ranging 275 to 1500 kW. Required hot water expansion volume in open, closed and diaphragm tanks. Hot water heating system design procedure with heat loss, boiler rating, heater units and more. Hot water heating temperatures adapts to outdoor temperatures. Seasonal effects on hot-water heating systems flow temperatures. Free online design tool for designing hot water heating systems - metric units. Online design tool for hot water heating systems. Hot-water heating systems can be classified by temperature and pressure. Dimmensions of PE pipes for gaseous supply according ISO 4437. Dimensions, wall thickness and weights of stainless steel pipes according to ASME B36.19 Stainless Steel Pipes. An introduction to the basic design of steam heating systems. Friction loss and velocity diagrams - in imperial (psi/100 ft, ft/s) and SI (Pa/100m, m/s) units.
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