HDPE Pipe ISO4427-2000 DN20 Plastic Tubes for Posters

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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: Hello I want to buy a leather storage tube for my A1 sized drawings. I'm studying architecture and I want something a bit more classy than the plastic tubes I have found. Does anyone know where I can buy one?: Cost Was this what you were looking for?

Q: I have a long flexible 1 plastic tube that is attached to itself forming a closed circuit and I'd like to add an electric blower to it to flow air continuously that will make a small ball go around continuously. I'd like to splice the blower into the 1 plastic tube but need to know where or how to exhaust the air to keep the air circuit moving continuously in one direction.: You can't place the blower in-line, as that will block the ball unless you have a specially built blower so that it can allow the ball to pass through the blower You need an arrangement that is something like a jet pump used for pumping water. The blower needs to be big enough (needs to move sufficient air volume) such that the amount of air in the tube is a relatively small fraction of the total air being moved by the blower. The blower needs to be connected to the main loop via a wye. A second wye, oriented in the opposite direction allows air to exhaust from the loop. A trap (parallel bars in the wye) is necessary to keep the ball from exiting the wye. The cross-sectional area of the loop between the wyes needs to be large enough so that you don't produce back pressure on the loop due to the blower's pressure. It is going to take some fussing around with the diameter of the loop between the two wyes and with the outlet diameter of the exhaust to get it right. Think of a loop with a line tangent to the loop and connected to the loop. Your blower is at one end of the line and the exhaust is at the other end. All you are doing is blowing air past the air that resides in the line, dragging those air molecules along with the velocity of the air being injected by the blower. A small fraction of the air will circulate around the loop and will carry the ball with it.

Q: Can the plastic water supply pipe be heated by electricity?: Yes, but the temperature must be well controlled. The purpose of the water heater with the electric heater should be to prevent water from freezing!

Q: Can plastic tubes be used for packaging chemicals?: Yes, plastic tubes can be used for packaging chemicals. Plastic tubes are often used for packaging chemicals due to their durability, resistance to corrosion, and ability to prevent leakage and contamination. Additionally, plastic tubes can be easily molded into various shapes and sizes to suit different packaging needs.

Q: Can plastic tubes be used for packaging personal care products?: Yes, plastic tubes can be used for packaging personal care products.

Q: Can plastic tubes be used for agricultural applications?: Yes, plastic tubes can indeed be used for agricultural applications. They are commonly used for irrigation systems, drainage systems, and as protective covers for plants. Plastic tubes are lightweight, durable, and resistant to corrosion, making them suitable for various agricultural needs.

Q: I have a fairly old A/C unit in my home. Thanks to my lovely new puppy's curiosity a white tube running from the unit into the house is now broken. It appeared to be a plastic tube about an inch or so in diameter. What is this tube for and what would be the easiest method of repairing it? It is broken clean off and there is now about a 10-14 inch piece missing.: That's where water is used to combine with freon which creates air

Q: Can plastic tubes be used for storing agricultural chemicals?: Yes, plastic tubes can be used for storing agricultural chemicals. Plastic tubes are commonly used in the agricultural industry for their chemical resistance and durability. They can effectively store various agricultural chemicals such as fertilizers, pesticides, and herbicides, protecting them from external factors like moisture and sunlight. However, it is important to ensure that the specific type of plastic tube being used is compatible with the chemical being stored to avoid any chemical reactions or contamination.

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: Sooo...i'm having some trouble here. I have about 3000 feet of plastic tubing (that looks a lot like the rubber tubing you'd see in a lab). Thats all i know about it.....and i need to find the right sized pump to get 2 gpm of water. Its 1/2 inch diameter tubing. Any sort of estimate would be nice.......trying to make sure i don't get a pump to weak. But don't wanna go to overboard (limited funds). thanks: Take a look at friction loss table on the Internet. I saw one table that said 1.55 psi per 100 feet, and another that said 3.8. In fire sprinkler work, we use tables derived from the Hazen-Williams formula. I don't have a table that goes that low on flow. A search for Hazen-Williams will get you to the formula. You will want to use the actual ID or the tube. It may be different from the nominal ID. For a roughness factor you could use 140.

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