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PE water supply pipe you must know the knowledge


Release time:

Aug 26,2019

PE water supply pipe is commonly used in municipal engineering. It is often necessary to find suitable manufacturers to purchase pipes that meet the requirements of the project. When asking the manufacturers, it is often necessary to provide specific parameter requirements. Many people do not understand the common knowledge of PE water supply pipe. Here, Runshuo Pipe Industry composes a general knowledge of PE water supply pipe: What types can PE be divided into according to the density of resin? Answer: PE can be divided into: low density polyethylene LDPE(0.9~0.93g/cm3) composed of homopolymer of ethylene monomer according to the density of resin; Medium density polyethylene MDPE(0.93~0.94g/cm3) consists of B

PE water supply pipe is commonly used in municipal engineering. It is often necessary to find suitable manufacturers to purchase pipes that meet the engineering requirements. When asking manufacturers, it is often necessary to provide specific parameter requirements. Many people do not understand the common knowledge of PE water supply pipe. Here, Runshuo Pipe Industry will compile a complete collection of common knowledge of PE water supply pipe:

PE according to the density of the resin can be divided into several categoriesWhat?

Answer: PE according to the density of the resin can be divided:

Low density polyethylene LDPE (0.9~0.93g/cm3) is composed of homopolymer of ethylene monomer;

MDPE (0.93~0.94g/cm3) is composed of ethylene and α-olefin;

High density polyethylene HDPE (0.94~0.965g/cm3) is composed of ethylene and propylene, butene, hexene monomer copolymerization.

PE according to the long-term hydrostatic strength can be divided into several categoriesWhat?

Answer: can be divided into PE32, PE40, PE63, PE80, PE100, the most used in water supply is PE80 and PE100.

PE water supply pipe you must know the knowledge

Runshuo PE100 water supply pipe

How is the classification by strength obtainedWhat?

Answer: The ISO9080 stipulates that in the long-term hydrostatic strength experiment at 20 ℃, the minimum required hydrostatic strength MRS of the material is determined, and the grade of the material is obtained by multiplying it by 10. MRS refers to the minimum required hydrostatic strength of the material under the condition of 20 ℃ and 50 years.

What is the difference between PE63 \PE80\PE100? What do 63,80,100 mean respectively? Which specification is generally used for building water supply and drainageWhat?

A: Material grade (MRS) (50 years, 20 ℃)MPa

PE100 10MPa

PE80 8MPa

PE63 6.3MPa

The so-called MRS refers to the circular tensile stress (rounded) on the pipe wall calculated when the pipe is damaged when the pipe is continuously applied to the polyethylene resin pipe wall for 50 years.

PE63 This series of pipes are generally used in urban and rural water supply projects; nominal pressure refers to the maximum allowable working pressure of the pipe at 20 ℃.

PE80 This series of pipes are mainly used in urban water supply projects; nominal pressure refers to the maximum allowable working pressure of the pipe to transport water at 20°C.

PE100 this series of pipes are especially suitable for large-diameter, high-pressure water supply projects; nominal pressure refers to the maximum allowable working pressure of the pipe to transport water at 20 ℃.

PE80 and PE100 gas can also be used.

The correspondence between the standard size ratio of PE water supply pipes produced by different grades of raw materials and the nominal pressure is as follows:












































PE water supply pipe pressure gauge

What are the basic parameters that have a greater impact on PE?What?

A: The basic parameters that have a greater impact on PE are molecular weight, molecular weight distribution, and crystallinity. The molecular weight is characterized by the melt flow rate MFR.

Molecular weight distribution describes the length and quality of polymer molecular chains. If all chains are relatively close, it is called narrow distribution, otherwise it is called wide distribution and is characterized by melt flow ratio. Crystallinity is characterized by density.

What is the effect of density on PE pipeWhat?

Answer: The density is low, and the "inflection point" of ductile-brittle transformation appears late, that is to say, the density is high and the ductile-brittle is poor.

What is the effect of molecular weight on PE?What?

Answer: The molecular weight is large and the impact resistance of PE is good. Increasing the molecular weight of PE is an effective means to improve the long-term strength and stress cracking resistance of PE pipes.














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