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FAQ
If you have any questions you'd like to ask, contact us and we will try to answer it.
What is Polyethylene?
Polyethylene (PE) is a resin, which is a milky white, translucent substance, derived from ethylene (- CH2 - CH2 -)n. Hogan and Banks discovered it apparently by accident in 1933. It is produced at high pressures and temperatures in the presence of any one of several catalysts, depending on the desired properties for the finished product.
What is HDPE?
High-density polyethylene (HDPE) is a polyethylene thermoplastic made from petroleum. It takes 1.75 kilograms of petroleum (in terms of energy and raw materials) to make one kilogram of HDPE.
We have quite extensively documented the applications, properties, and types of HDPE on our website.
What is design stress?
Design stress is used to calculate wall thickness for a given pipe diameter and operating pressure. Design stress is inversely proportional to temperature.
How is class defined?
Class x 100 = the operating pressure in kPa for which a pipe is designed. If you need a pipe that should be able to handle a pressure of 17 bar - you will need a class 20 pipe. In essence the class indicates the amount of pressure a pipe can handle under normal conditions.
What is the temperature range of HDPE?
High-density polyethylene has a temperature range up to 60ºC under pressurized conditions and in non-pressure applications a temperature maximum of 80ºC. It can withstand very cold temperatures: below –18ºC
What is PE63?
PE designates the minimum required strength of compound to be used for manufacturing. Pe63, Pe80 and Pe100 exists. PipeFlo mainly manufactures to the Pe63 specifications. There is a difference between the wall thicknesses of the different pipes because the material strength is different.
What does PN mean?
PN is the maximum allowable operating pressure in bars at 20 degrees Celsuis.
What does SDR mean?
SDR = nominal (minimum) outside diameter/minimum wall thickness.
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