HDPE Plastic Tubes ISO4427-2000 DN200

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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: Hot melt connection method of PE-RT plastic pipe and the matters needing attention: When welding elbow or three way, according to the design drawing requirements, should pay attention to the direction, in the pipe fittings and pipe in the straight direction, with auxiliary sign mark its position;

Q: How do you prevent plastic tubes from melting in high temperatures?: To prevent plastic tubes from melting in high temperatures, it is important to choose a plastic material with a higher melting point or thermal resistance. Materials such as polytetrafluoroethylene (PTFE), polypropylene (PP), or polyethylene (PE) can withstand higher temperatures. Additionally, proper insulation and heat shielding can be used to protect the plastic tubes from direct exposure to high temperatures.

Q: How do you dispose of plastic tubes?: Plastic tubes can be disposed of by first checking if they are recyclable. If they are, they should be rinsed and placed in the recycling bin. If they are not recyclable, they should be thrown in the regular trash.

Q: I'm would like to buy this in store and not online. Please let me know of where you think this item might be available for purchase.Thanks: try united states plastic corp.

Q: I hate the plastic tubes. They're fiddly awkward to use, especially as they get near running out. Metal was SOOO much easier. Just roll up the tube it stays rolled up. Just squeeze the metal it doesn't pop right up as soon as you release the pressure, but stays down. Basically metal packaging was right for the job. Plastic tubes are a poor, inadequate alternative, I hate them.It can't be due to cost, since so many drinks are still sold in metal cans, if it was down to the cost all the metal cans would be replaced with cheaper plastic alternatives, but they're not.So what is the reason it's only plastic for toothpaste now?: It is due to cost. Drinks used to be sold in steel cans and glass bottles, now they are sold in aluminum cans and plastic bottles, due to cost. You can buy a plastic clip to put on the toothpaste tube to solve your problem.

Q: how can i undo the super glue? plzz help. 10 points for best way that works.: You can go to the hardware shop and buy this stuff which dissolves superglue it is made especially for this, it is where you buy the superglue and other glues

Q: What is the maximum length of plastic tubes?: The maximum length of plastic tubes can vary depending on the specific type and application, but generally, they can range from a few inches to several feet or even longer.

Q: How do you prevent plastic tubes from becoming discolored?: One way to prevent plastic tubes from becoming discolored is to store them in a cool and dark place, away from direct sunlight and heat sources. Additionally, using a protective cover or wrapping the tubes with a light-blocking material can help minimize discoloration caused by exposure to light. Proper cleaning and maintenance, such as regular washing with mild soap and water, can also help prevent discoloration and keep the tubes looking fresh.

Q: Hello. I bought a Stentor Conservatoire Outfit and in the box is a long tube that's under the bow in the case. It is a see through tube the same length as the bow and has a black bit on each end that can be taken off.: That's a string tube. You can put spare strings in it. In the old days when most strings were gut core, strings were sold straight, not coiled. You bought your new strings at the store then put them in a tube in your case until they were needed.

Q: Should I use them or take them off. They are currently on my strings, but my two lower strings sound really bad.: I don't know what they're called and I don't play violin but I've seen them. They fit on the string where it passes over the bridge. I usually see them on the E string and I suspect it's to control the shrill highs. If they sound bad on your instrument, don't use them.

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