Roughness Of Copper Pipe

2021年9月16日
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Pipe Roughness Coefficients Type of Piping Material “C” Factor Unlined Cast/Ductile Iron Pipe 100 Cement-Lined Cast/Ductile Iron Pipe 140 Steel Pipe (Dry Systems/Pre-action Systems) 100 Steel Pipe (Wet Systems/Deluge Systems) 120 Galvanized Steel Pipe 120 Plastic Tubing 150 Copper Tubing 150 Note 1: Unli ned c ast iron and unl ine d duc. Aluminium, drawn/pressed: new: 0.0013 - 0.0015 mm: Aluminium, drawn/pressed: used: to 0.03 mm: Asbestos-cement: new, smooth: 0.03 - 0.1 mm: Brass, drawn/pressed.
*Roughness Of Copper Pipe
*Copper Tube Wall Thickness Chart
*Pipe Roughness Chart Surface coefficients to calculate flow friction and major pressure loss - surfaces like concrete, galvanized steel, corroded steel and more
For turbulent flow the friction coefficient depends on the Reynolds Number and the roughness of the duct or pipe wall. Roughness for different materials can be determined by experiments.
Absolute roughness - k - for some common materials below:SurfaceAbsolute Roughness Coefficient
- k -(10-3 m)
(feet)Drawn Copper, Lead, Brass, Aluminum (new) and the like0.001 - 0.002(3.28 - 6.56) 10-6PVC, PE and other smooth Plastic Pipes0.0015 - 0.007(0.49 - 2.30) 10-5Stainless steel, bead blasted0.001 - 0.006(0.00328 - 0.0197) 10-3Stainless steel, turned0.0004 - 0.006(0.00131 - 0.0197) 10-3Stainless steel, electron-polished0.0001 - 0.0008(0.000328 - 0.00262) 10-3Commercial steel or wrought iron0.045 - 0.09(1.48 - 2.95) 10-4Stretched steel0.0154.95 10-5Weld steel0.0451.48 10-4Galvanized steel0.154.92 10-4Rusted steel (corrosion)0.15 - 4(4.92 - 131) 10-4New cast iron0.25 - 0.8(8.2 - 26.2) 10-4Worn cast iron0.8 - 1.5(2.62 - 4.92) 10-3Rusty cast iron1.5 - 2.5(4.92 - 8.2) 10-3Sheet or asphalted cast iron0.01 - 0.015(3.28 - 4.92) 10-5Smoothed cement0.30.98 10-3Ordinary concrete0.3 - 1(0.98 - 3.28) 10-3Coarse concrete0.3 - 5(0.98 - 16.4) 10-3Wood stove0.18 - 0.9Well planed wood0.18 - 0.9(5.9 - 29.5) 10-4Ordinary wood516.4 10-3
*1 m = 3.28 feet
*Galvanized Steel - standard and commonly most used material in comfort air conditioning systems
*Aluminum - is widely used in clean room applications. Preferred for moisture laden air, special exhaust systems and ornamental duct systems
*Stainless Steel - is used in duct systems for kitchen exhaust, moisture laden air, and fume exhaust
*Carbon Steel (Black Iron) - is widely used in applications involving flues, stacks, hoods, other high temperature and special coating requirements for industrial use
*Copper - is mainly used for certain chemical exhaust and visual ductworkRelative Roughness
Relative roughness - the ratio between absolute roughness an pipe or duct diameter - is important when calculating pressure loss in ducts or pipes with the Colebrook Equation. Relative roughness can be expressed as
Free youtube download video for mac. r = k / dh (1)
where
r = relative roughness Camera raw adobe for mac.
k = roughness of duct, pipe or tube surface (m, ft)
dh = hydraulic diameter (m, ft)Typical Duct Materials and Their Use
*Galvanized Steel - most common material used in fabricated duct work for most comfort air conditioning systems.
*Aluminum - widely used in clean room applications, moisture laden air, exhaust systems and ornamental duct systems.
*Stainless Steel - used for kitchen exhaust, moisture laden air and fume exhausts.
*Carbon Steel (Black Iron) - used for flues, stacks, hoods, high temperature industrial systems.
*Copper - used for certain chemical exhaust systems and ornamental duct work.
*Fibreglass Reinforced Plastic (FRP) - used mainly for chemical exhausts, scrubbers and underground systems. Resistant to corrosion, self insulated, excellent sound attenuation and high quality sealing.
*Polyvinyl Chloride (PVC) - used in chemical exhaust, fumes and underground duct systems. Resistant to corrosion, light weight, easy to modify.
*Fabric (textile ducts) - used for even air distribution.
*Flex Duct (inner liner supported by a helix wire coil) - used for connections. Related Topics
* Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more Related Documents
* Colebrook Equation - Calculate friction loss coefficients in pipes, tubes and ducts
* Energy Equation - Pressure Head Loss in Ducts, Tubes and Pipes - Pressure and head loss in ducts, pipes and tubes
* Grit Size vs. Surface Roughness - Comparison of sandpaper grit size and surface roughness
* Manning’s Roughness Coefficients - Manning’s roughness coefficients for common materials
* Mechanical Processing and Surface Roughness - Mechanical production methods and surface roughness
* Velocity Classification of Ventilation Ducts - Recommended air velocities in ventilation ductsRoughness Of Copper Pipe Tag Search
* en: roughness coefficients friction ducts Commercial pipes comes in many different materials and many different sizes. The internal roughness of a pipe is an important factor when considering the friction losses of a fluid moving through the pipe.
For each pipe material either a single pipe roughness value or a range of roughness values is normally provided by the manufacturer. The roughness value, usually denoted as e, is used in the calculating the relative roughness of a pipe against the size of its diameter. Absolute Roughness
The roughness of a pipe is normally specified in either mm or inches and common values range from 0.0015 mm for PVC pipes through to 3.0 mm for rough concrete pipes. Relative Roughness
The relative roughness of a pipe is its roughness divided by its internal diameter or e/D, and this value is used in the calculation of the pipe friction factor, which is then used in the Darcy-Weisbach equation to calculate the friction loss in a pipe for a flowing fluid. Pipe Materials and Common Pipe Roughness ValuesMateriale (mm)e (inches)Concrete0.3 - 3.00.012 - 0.12Cast Iron0.260.010Galvanized Iron0.150.006Asphalted Cast Iron0.120.0048Commercial or Welded Steel0.0450.0018PVC, Glass, Other Drawn Tubing0.00150.00006Copper Tube Wall Thickness ChartPipe Materials and Pipe Diameter Database
Our Pipe Flow Expert software comes with its own database of pipe materials and pipe diameters, which includes the pipe roughness values and standard material schedules of many types of pipe. Users can also add their own pipe data for any material and any pipe size if required.
Pipe materials in the Pipe Flow Expert pipe database include Cast Iron (Class A,B and C), Copper Tube (Type X,Y,K,L,M), HDPE (SDR 7.3 to SDR 26), PVC (Schedule 40, 80, and CL100 to CL315), Stainless Steel (Schedule 5s, 10s, 40s), Steel (Schedule 40,80,160) and more.
Pipe Roughness Chart
You can download Pipe Flow Expert for a free trial and see how it makes it easy to draw, design and calculate the flows and pressure drops in your pipe system.
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