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]


SDR33 SDR26 SDR17.6 SDR13.6 SDR11
公称压力 PN,Mpa
0.32 0.4 0.6 0.8 1.0
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

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Q:Looking for powder coating setup cheap and info on how to plastic coat small metal pieces and tubing?
Harbor Freight Tools: $70 for the gun, $5 for the coating powder, $500 for a small oven. Read up, I thought I heard where you can use a converted household oven for small parts.
Q:How to distinguish between hard plastic pipes and flame retardant plastic pipes?
You can use this simple method to make a difference. Lighter with these two kinds of plastic, if it is flame retardant plastic will probably go out, no flame retardant will continue to go down, you can try.
Q:mossberg 500 tube spring sticks on last shell?
The tube will unscrew, but not easily the first time it comes off. When the mag springs in our department Mossbergs get tired, we replace them with Remington 870 mag springs and they seem to hold up better. Field strip the shotgun. Put the end of the mag tube in a vise and clamp down ONLY on the little rectangle on the end of the tube (NEVER on the tube itself). Insert the wooden handle.of your hammer into the receiver as close to the barrel mount as you can. Evenly as possible rotate counterclockwise. Remember, it's not going to come off easily. When it lets go, remove the tube, the follower and the spring. Do not try to just stretch out the spring a little. It won't work. Replace the spring and put the follower back in. put the tube back on the receiver. I find it easier to push the follower into the tube a little until you get the threads started. be careful not to crossthread. tighten it up the same way you took it off.
Q:help hamster stuck in his tube!?
He's probably not stuck. He probably likes the enclosed space of the tube. Hamsters rarely get stuck in places like that. They are designed to fit into small spaces like those, and those tubes are made for them to go into. If you're really worried about it, and they are those plastic tubes... Usually those tubes are made to be able to take them apart so you have 2 halves of the cylinder. (like if you cut a toilet paper roll the long way.) Just take it apart that way, and he'll come right out. Otherwise if you can reach him, just tap his hind end and if he isn't stuck he should move a bit.
Q:what tubing stands straight when you put air pressure inside of it?
The 2 foot diameter nylon sleeves filled with low pressure air that you see for advertising displays. If you try to use small diameter tubing, with flexible plastic tubing, it won't work. The closest tubing that does work is specially made for pressure gauges, and it just slightly uncoils under pressure.
Q:where can i buy coin safe tubes online?
It okorder.com they are a large coin and stamp supply company. Very few paper type coin rolls are of top quality and archival, most have acid in the paper.
Q:How can I connect a tube to a regular plastic bottle?
Go to the hardware store, get a brass reducing bushing, one that your hose will fit into, get some o-rings, and a flare fitting, one that your hose will fit in, and try this. Push your hose up through the plastic bottle put the brass reducing bushing on it then pull it through the hole in the bottle, put the ring inside the bottle between the reducing bushing and the bottle, then screw your flare fitting on the bushing, and it should hold and be water tight.
Q:03 Hyundai Elantra - Windshield Washer Ejector Tubing??
probably at like auto zone or napa, some place like that but i guess if you need a certain type then you might have to go back to the dealer, thats the same car i have, mines silver, i dont really like it but oh well
Q:Need some suggestions on cooling some water filled tubing?
You have not said how much heat you need to disperse - whether it needs to be a continuous process or not. You have not mentioned whether the lines are flexible or what length they are! However, without making things too complicated, if you use a longish length of plastic tubing, you could coil them and run them through a bucket full of an ice/salt/water mixture. Depending on how fast the water is moving through the tubes, if you had a strong mixture of salt and ice - with just enough water in the bucket to allow conduction - you might be able to freeze the water in the tubes - which is probably NOT what you want to do. So experiment before the performance.
Q:What is this tube near the battery/fuse box in my w202?
maybe a fusible link :)

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