Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

• the most efficient way to navigate the Engineering ToolBox!

# Hot Water Heating Systems - Pressure Loss in 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 20oC.

• 1 Pa = 10-6 N/mm2 = 10-5 bar = 0.1020 kp/m2 = 1.02x10-4 m H2O = 9.869x10-6 atm = 1.45x10-4 psi (lbf/in2)
• 1 kW = 1,000 Watts = 3,412 Btu/h = 737.6/550 British hp = 1.341 British hp = 103/9.80665 kgf m/s = 737.6 ft
• 1 liter/s = 10-3 m3/s = 3.6 m3/h = 0.03532 ft3/s = 2.1189 ft3/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 20oC the water flow is 1.2 liter/s
• The flow velocity is 0.54 m/s
• The pressure loss is 60 Pa/m

## Related Topics

### • Fluid Flow and Pressure Loss

Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more.

### • Fluid Mechanics

The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.

### • Heating

Heating systems - capacity and design of boilers, pipelines, heat exchangers, expansion systems and more.

## Related Documents

### ANSI Schedule 40 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.

### ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions

Pipe sizes, inside and outside diameters, wall thickness, schedules, moment of inertia, transverse area, weight of pipe filled with water - U.S. Customary Units.

### Design of Hot Water Heating Systems

Calculate gravity and forced circulating hot water heating systems.

### EN 10255 - Non-alloy Steel Tubes for Welding and Threading - Dimensions

Dimensions and weights of steel tubes according BS EN 10255.

### Ethylene Glycol Heat-Transfer Fluid Properties

Properties like freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines.

### Gravity Heating System

The density difference between hot and cold water is the circulating force in a self circulating gravity heating system.

### Heating System Flow Rates

Calculate flow rates in heating systems.

### Heating Systems - Safety Valves Size vs. Boiler Power

Safety valves with boilers ranging 275 to 1500 kW.

### Hot Water Expansion Tanks - Sizing

Required hot water expansion volume in open, closed and diaphragm tanks.

### Hot Water Heating System - Design Procedure

Hot water heating system design procedure with heat loss, boiler rating, heater units and more.

### Hot Water Heating System Temperatures vs. Outdoor Temperatures

Hot water heating temperatures adapts to outdoor temperatures.

### Hot Water Heating Systems - Flow Temperatures vs. Outside Temperatures

Seasonal effects on hot-water heating systems flow temperatures.

### Hot Water Heating Systems - Online Design Application

Free online design tool for designing hot water heating systems - metric units.

### Hot Water Heating Systems - Online Design Application, Imperial Units

Online design tool for hot water heating systems.

### Hot-Water Heating Systems - Classification

Hot-water heating systems can be classified by temperature and pressure.

### ISO 4437 - PE Pipes for Gaseous Fuels Supply - Dimensions

Dimmensions of PE pipes for gaseous supply according ISO 4437.

### Stainless Steel Pipes - Dimensions and Weights

Dimensions, wall thickness and weights of stainless steel pipes according to ASME B36.19 Stainless Steel Pipes.

### Steam Heating Systems - Design

An introduction to the basic design of steam heating systems.

### Steel Pipes Schedule 40 - Friction Loss vs. Water Flow Diagram

Friction loss and velocity diagrams - in imperial (psi/100 ft, ft/s) and SI (Pa/100m, m/s) units.

## Search Engineering ToolBox

• the most efficient way to navigate the Engineering ToolBox!

## SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

## Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.