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产品名称: PE阀门
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详细介绍

 


HDPE pipe

PE is polyethylene plastic, the most basic kind of plastic, plastic bag, plastic wrap and so on are PE, HDPE is a kind of high degree, non-polar thermoplastic resin. The original HDPE is milky white and is partially transparent in a small section. PE has excellent characteristics of most living and industrial chemicals.

PE pipe welding, PE pipe butt weld, the method provides the highest reliability and diameter range and pressure process: heating tube end, use a tool, called the contact pressure and temperature under the definition of "image". The end is rapidly in contact, and under pressure, in the cooling process.

PE tube has medium density polyethylene pipe and high density polyethylene pipe. The wall is divided into SDR11 and SDR17.6 series. The former applies to gaseous gas, natural gas, liquefied petroleum gas, which is mainly used for transporting natural gas. Compared with steel pipe, the construction technique is simple, has certain flexibility, more main is not to be used as anticorrosion treatment, will save a lot of process. Flaw instrument as steel tube, pay particular attention to the safety of the thermal heating construction spacing, and cannot be naked in the sun in the air, and is sensitive to chemicals, prevent leakage of sewage pipe damage.

China's municipal pipeline market, which has two of its biggest applications, is a sewer and gas pipeline. Chemical called Chinese PE, PE, PE material due to its high strength, high temperature resistant, corrosion resistant, non-toxic, wear resistance and other characteristics, widely used in water supply and drainage manufacturing. Because it does not rust, it is the ideal tube that replaces common iron to water pipes.

So the national bureau of standards in the new standard GB/T13663-2000 made a lot of revision, set to different level PE100 and PE80 pipes for different pressure strength, the tensile strength and remove old standard performance, and increase the elongation at break (greater than 350%), emphasizing basic toughness.

PE pipe for mine

Of all the engineering plastics, HDPE is the most attractive in plastic. The higher the molecular weight, the more wear-resistant the material, and even more metal materials (such as carbon steel, stainless steel, bronze, etc.). The service life is 4-6 times as long as steel pipe in strong corrosion and high wear condition, and is 9 times as high as ordinary polyethylene. And it increases delivery efficiency by 20%. Fire retardant, antistatic performance is good, meet the standard requirement. The underground service life is more than 20 years, the economic benefit is remarkable, the shock resistant, wear-resisting, the effect of double resistance is remarkable.

PE tubes

It is also called high density polyethylene pipe by PE pipe, which is HDPE. Such pipes are often used as the preferred pipes for municipal projects, mainly used in: pollution

PE pipe

Water treatment industry. Because of its abrasion resistance, acid resistance to corrosion, high temperature resistant, high voltage and other characteristics, gradually replaced the traditional pipes such as steel pipe, cement pipe position in the market, especially since this tubing, light weight and convenient installation and mobile is the first selection of new materials. Users should also pay special attention to the following points: 1. The choice of raw material for plastic piping is special. Polyethylene grades have thousands of raw materials, there are low to thousands of yuan a ton of raw materials, the raw material to produce the product can not be construction, or rework caused huge losses. The manufacturer of the pipe is subject to the manufacture of the regular professional. When choosing to buy PE pipe, you should inspect the manufacturer to see if it is capable of production.

Feed pipe

It is the product of traditional steel pipes and PVC drinking water pipes.

The water pipes must be subjected to a certain amount of pressure, usually with a high molecular weight and better mechanical properties, such as HDPE resin. LDPE resin has low tensile strength, low pressure difference, rigidity difference, poor dimensional stability in molding, and difficulty in connection to the pressure pipe of feed water. But because of its high hygiene standards, PE, especially HDPE resin, has become a common material for drinking water pipes. The fusion viscosity of HDPE resin is small, liquid, easy to process, and therefore the choice of the melt index is wider, usually between 0.3 and 3g / 10min.

Wall thickness (mm)

The pipe absorbs heat time (s)

Switch allows maximum time (s)

Boost cooling time

Cooling time (min)

<4.5

45

5

5

6

4.57

4570

56

56

610

712

70120

68

68

1016

1219

120190

810

811

1624

1926

190260

1012

1114

2432

2637

260370

1216

1419

3245

3750

370500

1620

1925

4560

5070

500700

2025

2535

6080

 

According to the piping material within each time a value is added together every mouth need to welding time. Welded pipe cooling time is generally 10 to 12 times the thickness.

PE pipe use material

PVC pipe underground

ABS (acrylonitrile-butadiene-styrene copolymer)

Unplasticized polyvinyl chloride (UPVC)

CPVC (post-chlorinated polyvinyl chloride)

PP (polypropylene)

PE (PE), also known as LDPE, MDPE and HDPE (low, medium, and high density)

PVDF

Performance advantage

A good line, should not only have good economy, but also should have stable and reliable interface, impact resistant material, cracking resistance, aging resistance, corrosion resistance and a series of advantages.

Advantages of HDPE piping system:

The connection is reliable: the connection between the pipe system and the strength of the pipe is higher than the strength of the pipe.

2, good low-temperature impact resistance: polyethylene of low temperature brittle temperature is extremely low, can be in 60-60 ℃ temperature range for safe use. During the winter construction, the pipe will not be brittle because of good impact.

The anti-stress cracking is good: HDPE has low notch sensitivity, high shear strength and excellent resistance to scratches, and environmental stress cracking performance is outstanding.

4, chemical resistance is good: the HDPE pipeline can withstand the corrosion of a variety of chemical media, and the chemicals in the soil will not cause any degradation of the pipe. Polyethylene is an electrical insulator, so there is no rot, rust or electrochemical corrosion; It also does not promote the growth of algae, bacteria or fungi.

5, ageing resistance, long service life: contains 2-2.5% of the uniform distribution of carbon black polyethylene pipe can be used in outdoor or in open air for 50 years, will not damage by uv radiation.

Good wear resistance: HDPE pipe is four times more resistant to steel pipe than steel pipe. Compared with steel pipes, the HDPE pipeline has better abrasion resistance than steel pipes, which means the HDPE pipeline has longer life and better economy.

7, good flexible, flexible makes it easy to bend, HDPE pipe engineering by changing the way for piping around obstructions, on many occasions, the flexible pipe can reduce the dosage of pipe fittings and reduce the cost of installation.

The water resistance is small: the HDPE pipe has a smooth inner surface, and the manning coefficient is 0.009. The smooth performance and non-adhesion feature ensure that the HDPE pipeline has higher throughput than traditional pipes, and also reduces the pressure loss and energy consumption of the pipeline.

9, easy to carry, HDPE pipe than concrete pipes, galvanized pipe and steel pipe is lighter, it is easy to handle and install, less manpower and equipment needs, means that the project installation cost greatly reduced.

10, a variety of new construction methods: HDPE pipe has a variety of construction technology, in addition to the traditional excavation method may be used for construction, can also use a variety of new trenchless technologies such as pipe jacking, directional drilling, liner, in the form of pipe and construction, for some do not allow the excavation sites, is the only option, so the HDPE pipe wider application fields.

PE - RT polyethylene pipe features:

Softness: because PE - RT is softer. Therefore, the construction cost is relatively low.

Heat conductivity: the pipe that is used for the heating of the floor needs to have good heat conduction. The thermal conductivity of PE -rt is better than that of PP - R and PP. Very suitable for floor heating use.

3, high temperature resistant sex: PE - RT resistance to high temperature can reach 60 ℃, and PEX can reach 95 ℃.

Low temperature impact: PE - RT is better for low temperature impact resistance. During winter construction, the pipe is not vulnerable to shock, and the flexibility of construction arrangement is increased.

Environmental protection: PE - RT and PP -r can be recycled and not pollute the environment. And PEX can't be recycled to produce secondary pollution;

Performance stability: PEX has the problem of controlling the crosslinking degree and the uniformity of the crosslinking, and the processing complex and machining directly affects the performance of the pipe material.

The PE - RT, the process is simple, and the performance of the pipe is basically determined by the raw material, the performance is more stable. Short for PE - RT is Polyethylene Raised Temperature, it is made of vinyl monomer and 1 - octene copolymer, and are specially designed for heating system and the density of ethylene/octene copolymer, which has a narrow molecular weight distribution, octene uniform distribution in polymerization of owner chain special molecular structure, it keeps the original PE health performance and machining performance advantages, and strengthened the high Temperature durability of a new type of special pipe material. With the raw material to produce the pipe is mainly used in building hot water/heating tube, its durability and the structure of the same life, the minimum can be up to 50 years, at the same time also has a good recovery, high added value.

PE pipe classifications are classified according to the mode of production of pipe fittings: injection pipe and welding fittings.

According to the construction method and the use classification, the electric heat fuse piece, the hot melt butt pipe, the socket pipe, the steel plastic transfer joint.

According to the engineering habit: sleeve, elbow, three-way, saddle type three, variable diameter, end block, flange, steel and plastic transformation.

According to the PE pipe, the main points are 0.6 MPa, 0.8 MPa, 1.0 MPa, 1.25 MPa, 1.6 MPa, MPa is the pressure unit, such as 0.6 MPa, which means the pressure 6 kg.

According to PE pipe diameter points can be divided into: 20,25,32,40,50,63,75,90,110,125,160,180,200,225,250,280,315,355,400,450,500,560,630,710,800,900,1000,1200, units are mm mm, PE pipe diameter refers to the outer diameter, corresponding to the pressure of different grade, pipe wall thickness is different.

 

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