PE pipe common specifications:
Convey20℃Pure waterCAvailableCmin＝1.25
PE63Allowable design stress limit5Mpa，PE80Design stress allowable limit6.3Mpa。
Features of PEX pipe:
1Corrosion resistance
Polyethylene is an inert material that can withstand the erosion of many chemicals, except for a few strong oxidizers, and is also not prone to bacterial growth. As is well-known, the reason steel and cast iron pipes are replaced by plastic pipes is not only because of plastics...Pipe materialsLower water conveyance energy consumption, lower domestic energy consumption, lighter weight, reduced water flow resistance, easy and quick installation, lower cost, longer lifespan, and thermal insulation features, plus the added benefits of plastic pipes being more resistant to corrosion and less prone to microbial growth, making them superior to steel and cast iron pipes.
2Flexibility
Polyethylene features unique flexibility and excellent scratch resistance. The flexibility of polyethylene pipe systems holds significant technical and economic value. The flexibility of polyethylene is a crucial property that greatly enhances the material's value for pipeline engineering. Good flexibility allows polyethylene pipes to be coiled and supplied in longer lengths, thereby avoiding a large number of joints and fittings.
3Low-temperature resistance
Polyethylene boasts exceptional low-temperature resistance.peThe low-temperature embrittlement point of the pipe is -70℃PVC offers superior performance over other piping options. During winter field construction, PVC...PVC－UPipes are prone to cracking; in Beijing, China, polyvinyl chloride (PVC) is commonly used for laying.PVC－UOne experience summed up from the pilot project of buried ground water supply pipelines is that it is not suitable to install polyvinyl chloride (PVC) pipes below freezing temperatures.PVC－UPipe laying construction has commenced.
4Fracture toughness
Polyethylene exhibits excellent toughness against rapid crack growth. When rapid crack growth occurs, the cracks 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.
Pursue wall thickness and nominal pressure:
PETubingCommon sizes typically range from16mm-1800mmBefore going to the market for selection, the nominal outer diameter is definitely determined, but in addition to the diameter, there is also the option of wall thickness, which varies with different diameters.PEThe wall thickness of the pipes also varies, with some being thicker.5More choices, the thicker the wall, the higher the nominal pressure it can withstand.
Appearance Evaluation Performance:
PETubing is a recyclable and green pipe option, but the properties of recycled materials (regrind) are still somewhat inferior to virgin materials, and can be substandard to some extent. Excessive use of regrind can lead to issues such as uneven color, undulations, bubbles, and a rough inner wall in the pipes. It's advisable to avoid such tubing when making a selection.
National Standard & Brand:
National Standard:PEThe term "GB standard" refers to the national standard of China.GB/T 13663-2000Qualified steel pipes in the market are all accompanied by inspection criteria descriptions, which can be used to compare and ensure compliance with national standards.
Brand: The price of pipe materials meeting national standards can vary greatly; this might be due to brand benefits. However, pipes that meet national standards can comply with normal construction specifications.PETrend in the market“National Standard”We are the first brand.
Key Selection Points for PEX Pipes:
PEThe quality and superiority of pipe products mainly depend on the raw materials, processing equipment, and processing technology.
How to Select High-QualityPEConsider the following aspects?
1Inspect the appearance
Superior PEMaterial pipe products feature smooth and even inner and outer wall surfaces without bubbles, indentations, or discolorations, while inferior products usually have more granular impurities and uneven, pitted walls.
2Milling Strip
Strips 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 brittle, with darker colors at the cut edges.
3Welding joint
The quality of the welding joints primarily reflects the excellence of the production process. Good welding jointsPEThe entire circumference features a smooth and symmetrical rolled edge, with the base of the roll being wider, solid, smooth, and flat, allowing for moderate elongation. Low-quality products have a rolled edge surface with numerous pores, uneven edges, and the rolled edge shortens after pressure.
4Flavor
High-density, pure-grade raw materials producedPEThe piping may have a slight plastic odor, but after cooling and sitting for a while, there will be no smell. The flame after burning is light blue at the bottom, burning stably with no odor. Poor-quality products will have a strong pungent smell, with black smoke and an unpleasant odor upon burning.
5Tensile elongation at break
Comparison of the product's length after stress break to its original length.3.5Multiple times above is excellent.Product
6Oxidation Induction Time
This is a laboratory test.PEOne standard test for piping materials is the duration of the automatic catalytic oxidation reaction under high-temperature oxygen conditions; the longer the time, the better the product performance.
