HDPE Gas Pipe Corrosion-resistant Lasting Strength

HDPE Gas Pipe Internationally, the polyethylene pipe material is divided into PE32, PE40, PE63, PE80, PE100 five grades, and for the gas pipe and water pipe material is mainly PE80 and PE100. China's polyethylene pipe material is not graded, which makes the domestic polyethylene gas pipe and water pipe manufacturers to choose raw materials more difficult, but also to the use of polyethylene pipe has brought no small hidden dangers.

Therefore, the National Bureau of Standards in the new standard GB / T13663-2000 made a lot of amendments, the provisions of the water supply pipe at different levels PE80 and PE100 corresponding to different pressure intensity, and remove the old standard tensile strength properties, and increased the fracture Elongation (greater than 350%), which emphasizes the basic toughness.

Gas with pe pipe is the traditional steel pipe, poly chlorine text ethylene gas replacement products. Gas pipe must withstand a certain pressure, usually to use a large molecular weight, better mechanical properties of PE resin, such as HDPE resin. LDPE resin has low tensile strength, poor pressure resistance, poor rigidity, poor dimensional stability during molding, and difficulty in connection, and is not suitable as a material for water supply pressure pipes. But because of its high health indicators, LDPE, especially LLDPE resin has become a common material of the gas pipe. LDPE, LLDPE resin melt viscosity is small, good mobility, easy processing, and thus its melt index selection range is also wide, usually MI between 0.3-3g / 10min.

HDPE Gas Pipe pipeline application process, HDPE Gas Pipeline can achieve the required long-term life of a key factor is the laying of the quality. The PE pipe has a variety of unique properties to make the laying of the pipeline more secure, fast, and the correct construction design and installation procedures will make these advantages of the pipeline to a greater degree of play.

Prvič, značilnosti delovanja plinske cevi HDPE

1, odpornost proti koroziji

2, lasting strength

3, višji varnostni faktor

4, odlično navitje

5, good anti-scratch ability

6, dobra odpornost na hitro razpokanje, da prenese odpornost

7, napredna struktura okovja varovalk

8, long life, up to 50 years.

Drugič, tehnični kazalniki HDPE za plinske cevi:

1, elongation at break%> 350

2, thermal stability (200 ℃), min <20

3, stopnja umika navpične velikosti% (110 ") <3

4, hydrostatic strength:

(1) 20 ℃, ring stress 9.0Mpa, toughness destruction time> 100h

(2) 80 ", napetost obroča 4,6Mpa, čas uničenja žilavosti> 165h

(3) 80 ", napetost obroča 4,0 MPa, čas uničenja žilavosti> 1000 h

Third, HDPE Gas Pipe connection steps:

1. Clamp and clean the port

2. Prilagodite in izostrite vrata

3. Pristanišče je ravno

4. Pressure welding

5. Pressure relief cooling

Četrti, priključne točke za plinske cevi HDPE

Pipe, pipe fittings hot melt installation of gas buried polyethylene PE pipe, pipe D90 mm below the use of hot melt socket connection, D90mm above the use of hot-melt docking way, the correct installation of the pipeline system to ensure that the user's own safety and engineering quality, we It is recommended to use the multi-angle welding machine and hot-melt docking machine provided by our company. The welding steps are as follows:

1, will need to weld the pipe, pipe fittings fixed on the docking machine, according to the size of the use of fixture pipe, the face with a milling cutter planing, so that the docking face smooth, clean and vertical.

2, nastavite cev, višino cevi, tako da je cev, ki jo je treba variti, fitingi za cevi popolnoma enaki in priključeni na grelno ploščo.

3, da se ogreva na grelno ploščo do nazivne temperature, bo treba variti cev, cevni priključki, da bo konec ogrevanja, ločeno doseči čas ogrevanja, cev, cevni priključki iz grelne plošče in nato dva grelna konca priključka, enakomerna prirobnica, ki se ohladi. Tehnične zahteve za spajanje s topljenim taljenjem so skladne.