HDPE PIPE ISO4427-2000 DN355

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Physical properties[edit]

Polyethylene is a thermoplasticpolymer consisting of long hydrocarbon chains. Depending on the crystallinity and molecular weight, a melting point and glass transition may or may not be observable. The temperature at which these occur varies strongly with the type of polyethylene. For common commercial grades of medium- and high-density polyethylene the melting point is typically in the range 120 to 180 °C (248 to 356 °F). The melting point for average, commercial, low-density polyethylene is typically 105 to 115 °C (221 to 239 °F).it is transprant.

Chemical properties[edit]

Most LDPE, MDPE and HDPE grades have excellent chemical resistance, meaning that it is not attacked by strong acids or strong bases. It is also resistant to gentle oxidants and reducing agents. Polyethylene burns slowly with a blue flame having a yellow tip and gives off an odour of paraffin. The material continues burning on removal of the flame source and produces a drip.^[3] Crystalline samples do not dissolve at room temperature. Polyethylene (other than cross-linked polyethylene) usually can be dissolved at elevated temperatures in aromatic hydrocarbons such as toluene or xylene, or in chlorinated solvents such as trichloroethane or trichlorobenzene.^[4]

GB/T13663-2000：

PE63管材规格
公称外径dn，mm	SDR33	SDR26	SDR17.6	SDR13.6	SDR11
	公称压力 PN,Mpa
	0.32	0.4	0.6	0.8	1.0
	公称壁厚	公称壁厚	公称壁厚	公称壁厚	公称壁厚
16					2.3
20				2.3	2.3
25			2.3	2.3	2.3
32			2.3	2.4	2.9
40		2.3	2.3	3.0	3.7
50		2.3	2.9	3.7	4.6
63	2.3	2.5	3.6	4.7	5.8
75	2.3	2.9	4.3	5.6	6.8
90	2.8	3.5	5.1	6.7	8.2
110	3.4	4.2	6.3	8.1	10.0
125	3.9	4.8	7.1	9.2	11.4
140	4.3	5.4	8.0	10.3	12.7
160	4.9	6.2	9.1	11.8	14.6
180	5.5	6.9	10.2	13.3	16.4
200	6.2	7.7	11.4	14.7	18.2
225	6.9	8.6	12.8	16.6	20.5
250	7.7	9.6	14.2	18.4	22.7
280	8.6	10.7	15.9	20.6	25.4
315	9.7	12.1	17.9	23.2	28.6
355	10.9	13.6	20.1	26.1	32.2
400	12.3	15.3	22.7	29.4	36.3
450	13.8	17.2	25.5	33.1	40.9
500	15.3	19.1	28.3	36.8	45.4
560	17.2	21.4	31.7	41.2	50.8
630	19.3	24.1	35.7	46.3	57.2

Q: Am I even safe to drive to the mechanic or should I just two it? Holy crap, that could have been there for months for all I know since I last checked.: It's an air hose that connects your air filter to your engine. It's safe to drive, but you should replace it when you get the chance. And there's no need to take it to your mechanic either. Just use a screwdriver to disconnect the hose clamps at either end, and if the new hose is a tight fit, you might need some kind of lube to get it on there. I just replaced mine because the old one had a tear that was wrapped in tape, and my mechanic suggested I replace it. It would have been $78 plus tax at Auto Zone, but instead I got the exact same thing on OKorder for $12.

Q: How do plastic tubes compare to fiberglass tubes in terms of strength?: Plastic tubes are generally less strong than fiberglass tubes. Fiberglass tubes offer superior strength due to the reinforcement of fiberglass strands within the material, making them more resistant to bending, cracking, and breaking.

Q: Are plastic tubes flexible or rigid?: Plastic tubes can be both flexible and rigid, depending on their material and design.

Q: Are plastic tubes resistant to UV radiation?: Yes, plastic tubes can be resistant to UV radiation, depending on the type of plastic used in their manufacturing. Some plastics, such as polyvinyl chloride (PVC) and high-density polyethylene (HDPE), are inherently UV resistant. However, other plastics, like polypropylene (PP), may require the addition of UV stabilizers to enhance their resistance to UV radiation.

Q: PR plastic tubes, everyone said, permanent, a great harm to health, even drinking water is a problem?: 1) change the water pipe: the longer the PPR pipe is used, the greater the poison, or the regular flushing and disinfection of the old pipe.2) install pre filter and cabinet water purifier in old pipe line3) new home water pipes customers can study in Europe and the United States, the family installed plastic copper pipe (slightly higher price) or lined with copper PPR tube (moderate price). Because copper has excellent sterilization function and self-cleaning function, it is most suitable for family use.

Q: Can plastic tubes be used for insulation in construction?: Yes, plastic tubes can be used for insulation in construction. They are commonly used to insulate pipes and electrical wires to protect them from heat loss or gain and to prevent condensation. Plastic tubes provide a cost-effective and durable solution for insulation in various construction applications.

Q: Ok so I now have all my gear to go bass fishing and im using some soft plastic tubes and brush hogs mainly using a carolina rig. I will be fishing in lakes for small mouth and large mouth. After casting what are some good methods of retrieval for the lures other than just reeling it in. for instance should i pause for so many seconds after the bait hits the water then reel? or should i reel then pause for so many seconds then reel again?: a okorder / theres a link to it

Q: Can plastic tubes be used for hydroponic systems?: Yes, plastic tubes can be used for hydroponic systems. Plastic tubes are commonly used in hydroponics as a cost-effective and practical option for delivering nutrient-rich water to the plant roots. They are durable, lightweight, and easily adjustable, making them suitable for various types of hydroponic setups.