HDPE Pipe

PE pipe common specifications:

Convey20℃WaterCAvailableCmin＝1.25

PE63Allowable design stress limit5Mpa，PE80Allowable design stress limit6.3Mpa。

PE Pipe Features:

1Corrosion resistance

Polyethylene is an inert material that can withstand the侵蚀 of many chemicals, except for a few strong oxidizing agents, and is also not prone to bacterial growth. As everyone knows, the reason why steel pipes and cast iron pipes are being replaced by plastic pipes is not just because of the properties of plastics...Pipe materialsLower water transportation energy consumption, lower domestic energy consumption, lighter weight, less water flow resistance, easy and quick installation, lower cost, longer lifespan, with thermal insulation function, and also due to the superior properties of plastic pipes such as corrosion resistance and being less prone to microbial growth, compared to steel and cast iron pipes.

2Flexibility

Polyethylene boasts unique flexibility and excellent scratch resistance. The flexibility of the polyethylene pipeline system holds significant technical and economic value. Polyethylene's flexibility is a crucial property that greatly enhances the value of this material for pipeline engineering. Good flexibility allows polyethylene pipes to be coiled and supplied in longer lengths, avoiding numerous joints and fittings.

3Low-temperature resistance

Polyethylene boasts exceptional low-temperature resistance.peThe pipe's low-temperature embrittlement point is -70℃PVC excels over other piping options. During winter field construction, PVC...PVC－UThe pipe is prone to cracking, and in the Beijing area of our country, polyvinyl chloride (PVC) is used for laying.PVC－UA lesson learned from the pilot project of buried ground water supply pipelines is that it is not advisable to install polyvinyl chloride (PVC) pipes when temperatures fall below freezing.PVC－UPipe laying construction is underway.

4Fracture toughness

Polyethylene possesses excellent toughness against rapid crack growth. When rapid crack growth occurs, the crack can...100～45m／sRapid expansion over several hundred meters to tens of kilometers can cause damage to long-distance pipelines, leading to massive leakage incidents, as well as subsequent combustion and explosion (in natural gas transmission) or flood (in water transmission) accidents.

Strive for wall thickness and nominal pressure:

PETubingStandard diameters typically range from16mm-1800mmBefore heading to the market, the nominal outside diameter is definitely confirmed, but in addition to the diameter, there's also the option of wall thickness, varying for different diameters.PEThe wall thickness of the pipe varies accordingly; some are thicker.5More options, the thicker the wall, the higher the nominal pressure it can withstand.

Appearance Assessment Performance:

PETubing is a recyclable and eco-friendly pipe, but the properties of recycled material (regrind) are still somewhat inferior to virgin material, and can be substandard to some extent. Excessive use of regrind can lead to issues such as uneven coloration, irregular contours, bubbles, and rough pipe walls. It's advisable to avoid such piping when making selections.

National Standard & Brand:

National Standard:PEDomestic Standard refers to the national standards set by the country.GB/T 13663-2000Qualified steel pipes on the market are all accompanied by inspection specifications, which can be used to compare and ensure compliance with national standards.

Brand: There is a wide range of prices for pipe materials that meet national standards, which might be attributed to the brand effect. However, pipes that meet national standards can comply with normal construction standards, inPEPiping the market“National Standard”First in brand.

Selection Tips for PEX Pipe

PEThe quality and superiority of pipe products mainly depend on the raw materials, processing equipment, and processing technology.

How to select high-qualityPEManage? Consider the following aspects.

1Inspect the appearance

Superior PEThe surface of the inner and outer walls of the pipe produced from raw materials is smooth, flat, free of bubbles and dents, and without color spots or other defects. In contrast, low-quality products typically have more granular impurities, with the inner and outer walls not smooth and featuring rough spots.

2Milling Strip

Strip cut from machine tool processingPEPipe materials, superiorPENot prone to breakage in stretching and folding, with strong resilience and bright cut edges. ExcellentTubes feature symmetrical flanges, solid, smooth, and flat; inferior products are prone to bending and breaking, being rather brittle, with darker colors at the cut edges. 

3Welding joint

Weld joints primarily reflect the quality of the production process; good weld jointsPEThe entire circumference features a smooth, symmetrical rolled edge with a wider base, solid, smooth, and flat, which can be slightly elongated. Low-quality products have a surface with numerous air holes on the rolled edge, uneven edges, and the rolled edge shortens after being subjected to pressure.

4Taste

High-density, pure-grade raw materials producedPEPipes may have a slight plastic odor, but after cooling and being left for a while, there will be no smell. The flame at the bottom is faintly blue when burned, burning stably with no odor. Poor-quality products will have a strong pungent smell and produce black smoke with an odor when burned.

5Tenacity

Comparison of the product's length after tensile stress break with its original length.3.5More than double is excellent.Product

6Oxidation Induction Time

This is a laboratory testPEOne standard test for pipe materials is the duration of the auto-catalytic oxidation reaction under high-temperature oxygen conditions; the longer the time, the better the product performance.