pe pipes - pressure grades
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VARIOUS PIPES PRESSURE GRADETRANSCRIPT
3/8/2016 PE Pipes - Pressure Grades
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PE Pipes - Pressure Grades
Polyethylene - PE - pipes and pressure classes
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High density polyethylene - HDPE - is a very popular material for water pipes. It is
resistant to chemicals
easy and l ight weighted
long l iving
low friction
relatively cheap
flexible
sun resistant
PE pipes can be used in range of temperatures -40 oC to 60 oC considering the change of operating pressure. Typical ly the standard specification identi fy class of a HDPE pipe is by the nominal pressure class - PN - up to PN 20 or 20
bar. HDPE pipe can also be classified by the material used - PE 100, PE 80, PE63, PE 40 or PE 32.
Pressure Nominal - PN
PE pipes are produced in different pressure grades (PN grades), which indicates the pressure in bars the pipe can support with water at 20 oC.
The pressure grades avai lable according to European standards are
PN 2.5 - max pressure 2.5 bar
PN 4 - max pressure 4 bar
PN 6 - max pressure 6 bar
PN 10 - max pressure 10 bar
PN 16 - max pressure 16 bar
1 bar = 105 Pa (N/m2) = 0.1 N/mm2 = 10,197 kp/m2 = 10.20 m H2O = 0.9869 atm = 14.50 psi (lbf/in2) = 106 dyn/cm2 = 750 mmHg
Color Codes and Pressure Grades
Color codes used to indicate the pressure grades on the pipes are
Color Code PE Pressure Grade
Yellow PN 4
Red PN 6
Blue PN 10
Green PN 16
Classed by Materials
Polyethylene pipes are also classified by the type of material used:
PE 32 - low pressure piping systems
PE 40 - low pressure piping systems
PE 63 - medium pressure piping systems - irrigation system - drinking water connections
PE 80 - gas pipe for natural gas distribution network with pressure rate up to 4 bars - drinking water pipe with pressure rate up to 16 bar - sewers, outfal l pipes, industrial pipes
PE 100 - high demands piping appl ications
The Minimum Required Strength - MRS - according ISO 4427 for the different materials are:
Designation of materialMRS at 50 years and 20oC
MPa (bar)
PE 100 10 (100)
PE 80 8 (80)
PE 63 6.3 (63)
PE 40 4 (40)
PE 32 3.2 (32)
Color Codes and Materials Classifications
Common colors used to classify the pipes
completely black for industrial appl ications
completely blue, or black with blue stripes, fro potable water
completely yel low, or black with yel low stripes, for gas conduits
Note that the colors may depend on country.
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Related Topics
Pressure Ratings - Pressure ratings of pipes and tubes and their fi ttings - carbon steel , stainless steel, plastic, copper and more
Dimensions - Sizes and dimensions of pipes and tubes, and their fi ttings - inside and outside diameter, weight and more
Related Documents
PolyEthylene - PE - and Chemical Resistance - Chemical resistance of polyethylene - PEH - pipes
PE Pipes - Pressure Ratings - Water pressure ratings for schedule 40 and schedule 80 Polyethylene plastic pipes
PE Pipes - Temperature and Pressure Ratings - PolyEthylene pipe - temperature and maximum operating pressure
PE Pipes - Dimensions - Polyethylene pipe dimensions according European Standards
PE, PEH or PVC Pipes - Pressure Drop Diagram - Pressure drop (bar/100 m) and velocy in PE, PEH or PVC pipes
PE - PolyEthylene Pipes, Flow and Pressure Loss - Water flow in SDR pressure rated PE-pipes - pressure loss and velocities - Imperial and SI units
PE Water Supply Pipes - Properties - Nominal pipe size, outside diameter, wal l thickness, weight and working pressure
PE Pipes and Weights - Weight of polyethylene pipes - metric units
Standard Dimension Ratio - SDR - It is common to use the Standard Dimension Ratio - SDR - as method of rating pressure piping
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