TheHDPE pipe is manufactured and processed using polyethylene as the raw material.  HDPE pipe has a variety of classification forms, let me answer for you one by one.First of all, It can be classified into PE80, PE100, and PER100-RC based on different material properties. Additionally, it can also be categorized according to its usage, such as HDPE water supply pipe, HDPE drainage pipe, HDPE gas pipe, HDPE agricultural irrigation pipe, and HDPE mining pipe.

HDPE water supply pipe is mainly used in urban water supply and industrial water supply system, with corrosion resistance, damage resistance and good construction performance. The nominal diameter of the HDPE water supply pipe is generally below 2000mm, and the pressure is within 2.0Mpa.
HDPE water supply pipe feature:

Good health performance: PE pipe processing does not add heavy metal salt stabilizer, the material is non-toxic, no scaling layer, no bacteria, a good solution to the secondary pollution of urban drinking water.

Excellent corrosion resistance: In addition to a few strong oxidants, can withstand the erosion of a variety of chemical media; No electrochemical corrosion.

Long service life: under rated temperature and pressure conditions, PE pipes can be safely used for more than 50 years.

Good impact resistance: PE pipe toughness, high impact strength, heavy objects directly pressed through the pipeline, will not cause the pipeline to break.

Reliable connection performance: The strength of the hot melt or electric melt interface of the PE pipe is higher than that of the pipe body, and the joint will not be disconnected due to soil movement or live load.

Good construction performance: light pipe, simple welding process, convenient construction, low overall project cost.

HDPE drainage pipe: mainly used in urban drainage systems, sewage systems and rainwater drainage systems, with chemical and UV radiation resistance. Here refers mainly to double-wall corrugated pipe.
Double-wall corrugated pipe feature:

Strong resistance to external pressure:

The outer wall is a ring corrugated structure, which greatly enhances the ring stiffness of the pipe, thus enhancing the resistance of the pipe to soil load. In this performance, the HDPE double-wall corrugated pipe has obvious advantages compared with other pipes.

Low project cost:

Under the condition of the same load, the HDPE double-wall corrugated pipe only needs a thinner wall to meet the requirements. Therefore, compared with the solid wall pipe of the same material specification, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipe is also lower. This is another very prominent feature of the pipe.

Small friction coefficient, large flow:

HDPE double-wall corrugated pipe made of HDPE can pass through a greater flow rate than other pipes of the same caliber. In other words, under the same flow requirements, a relatively small diameter HDPE double-wall corrugated pipe can be used.

Low temperature and impact resistance:

The embrittlement temperature of HDPE double-wall bellows is -70℃. General low temperature conditions (above -30℃) do not need to take special protection measures during construction, winter construction is convenient, and HDPE double-wall corrugated pipe has good impact resistance.

Good chemical stability

Since HDPE molecules are not polar, they are chemically extremely stable. Except for a few strong oxidants, most chemical media do not destroy it. The soil, electricity, acid-base factors of the general use environment will not damage the pipeline, no bacteria, no scale, and its circulation area will not decrease with the increase of operation time.

Long service life:

Under the condition of not being subjected to the ultraviolet rays of sunlight, the service life of the double-wall corrugated pipe of HDPE can reach more than 50 years.

Excellent wear resistance:

Germany has used tests to prove that the wear resistance of HDPE is even several times higher than that of steel pipes.

Proper deflection:

A certain length of HDPE double-wall corrugated pipe can be slightly deflected in axial direction, not affected by a certain degree of uneven settlement on the ground, and can be directly laid in slightly irregular grooves without pipe fittings.

HDPE gas pipe: mainly used for gas transmission, with corrosion resistance and high safety characteristics.

Corrosion resistance: ‌HDPE material is an inert material, ‌ can withstand the erosion of a variety of chemical media, ‌ in addition to a few strong oxidants, ‌ need not worry about corrosion leakage. ‌
HDPE gas pipe feature:

Sealing performance: ‌HDPE gas pipeline mainly adopts welding connection, ‌ such as hot melt connection or electric melt connection, ‌ this connection method realizes the integration of joint and pipe, ‌ interface tensile strength and blasting strength are higher than the pipe body, ‌ ensures the safety of the whole pipeline system. ‌

Cracking resistance: ‌HDPE gas pipeline is made of high quality raw materials, ‌ has been tested by international authoritative institutions, ‌ has excellent resistance to environmental stress cracking ability. ‌

Flexibility: ‌HDPE gas pipeline elongation at break generally exceeds 500%, ‌ the ability to adapt to uneven settlement of pipe base is very strong, ‌ is a kind of pipeline with excellent seismic performance. ‌

Scratch resistance: ‌HDPE gas pipeline has excellent scratch resistance, ‌ can effectively prevent pipeline damage caused by scratches. ‌

Flexibility: ‌HDPE pipe can be easily made into coils, ‌ in a longer length supply, ‌ thereby saving a variety of connection fittings. ‌

Long service life: ‌ under normal working conditions, ‌HDPE gas pipeline service life can reach more than 50 years.

HDPE agricultural irrigation pipe: mainly used in farmland irrigation and drainage systems, with anti-erosion, anti-UV and chemical resistance.
HDPE agricultural irrigation pipe feature:

Strong anti-ultraviolet ability, strong anti-friction ability, no deformation in the sun exposure.

Good flexibility: It can be bent at will according to crop specifications.

Good wear resistance: wear resistance test of PE agricultural irrigation pipe and traditional steel pipe shows that the wear resistance of PE pipe is 4 times that of steel pipe.

Low water flow resistance: The inner wall of PE agricultural irrigation pipe is smooth, which is not easy to produce scale and moss, and the water flow resistance is small, reducing the water supply consumption.

Low temperature resistance: the use temperature of PE agricultural irrigation pipe is between minus 20 degrees and 60 degrees, and there will be no rupture and explosion in the natural environment.

HDPE mine pipe: mainly used to transport ore, tailings and chemical liquids, with high durability and chemical corrosion resistance.
HDPE mine pipe feature:

Flame retardant, antistatic: the antistatic components and flame retardant components of polyethylene pipe used in coal mine are evenly distributed in the pipe body, so the antistatic and flame retardant performance indicators will not be affected by long use time. Antistatic and flame retardant properties are in line with national standards, suitable for underground flammable and explosive specific places.

Corrosion resistance and no scaling: polyethylene used in coal mine has strong corrosion resistance and no scaling, especially suitable for underground transportation of water with high sulfur quality and water containing calcium and magnesium plasma. The service life is much higher than that of the steel pipe, and the comprehensive economic benefit is high.

Self-lubricity: the inner wall of polyethylene pipe used in coal mine is smooth, the resistance is small when conveying fluid, and the roughness is far less than that of steel pipe and glass fiber reinforced plastic pipe, which can improve the conveying capacity by 30% under the same conditions. Good flexibility, strong resistance to geological settlement;

Good anti-aging and anti-fast cracking performance: polyethylene pipe used in coal mine has good anti-aging performance, is not easy to embrittlement at low temperature, and has good anti-fast cracking performance; It has good toughness and can effectively absorb impact energy; The bending modulus is moderate and the elongation at break is over 400%. In the coal mine, geological settlement and other phenomena occur from time to time under special working conditions, the polyethylene pipe used in coal mine can effectively avoid fracture accidents compared with the traditional rigid steel pipe and glass steel pipe.

Good wear resistance: elastic wear resistant layer can be added, so that PE pipe can be soft and rigid, and increase the service life of PE mining pipe.

HDPE pipe connection:

Electric welding: The use of special electric welding machine to connect the straight pipe with the straight pipe and the straight pipe with the pipe fittings. It is generally used for pipes below 160mm.

Hot melt butt connection: The use of special butt welding machine pipe connection, generally used for more than 160mm pipe.

Steel-plastic connection: flange, thread and other methods can be used to connect.