HDPE PIPE ISO4427-2000 DN25

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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:How to clean a plastic tube with stains?
Let the tub fill up over the stains and allow it to soak for four hours. When the water drains out, you should be able to easily scrub off the stains. Clean the bathroom sink Non-gel toothpaste works as well as anything else to clean the bathroom sink. The tube's sitting right there, so just squirt some in, scrub with a sponge, and rinse it out. Bonus: The toothpaste will kill any odors emanating from the drain trap Good Luck !
Q:Does the high-rise building have special requirements for the upper and lower water pipes?
The horizontal pipe in the basement of the waste water pipe is a welded steel pipe, the vertical pipe is PVC plastic pipe, and the fire prevention ring is arranged at the through plate.
Q:Where can I find plastic tubing?
The plastic tubing store.
Q:what is dialysis tubing? how can it be used to demonstrate osmosis?
Dialysis tubing is actually a semi-permeable membrane when used in water. Experiments illustrating osmosis and pressure gradients across a membrane use dialysis tubing. This tubing usually comes in rolls and when wet, will open up into a cylindrical tube that can be tied off at the ends. The tubing can also be fitted over a thistle tube for such experiments. Dialysis tubing is literally a semi-permeable sheet of plastic. [Like a cell membrane, it can allow certain things in, but not everything.] In a dialysis tubing experiment, one fills the inside of the sheet with a concentrated liquid of some sort and then seals off the open ends of the tube. Then, one places the tube and liquid into another type of liquid and after awhile, the liquid from the outside moves inside the tube. What I did for my first dialysis tubing experiment was filling the inside of the tube with a concentrated starch solution and placed the tubing into a beaker of Lugol's solution diluted with distilled water. After a 1/2 hr, some of the Lugol's and distilled water will have entered the dialysis tubing. One can see that osmosis has happened because the Lugol's in the tube would have turned blue when in contact with the starch. Osmosis caused the diluted/unconcentrated solution of Lugol's and dH2O to go through the semi permeable membrane and into the concentrated solution of starch. Like a cell's membrane, if the outside of the cell is more concentrated, the cell would lose water because the the water will leave the cell and go for the concentrated outside environment. If the inside of the cell was more concentrated than the outside, the outside water will go into the cell through the semipermeable membrane.
Q:Just found a plastic tube in my steak?!?!?!?
Lucky you. Sue the store, the meatpacker, the slaughterhouse, the meatfactory. Emotional damages. You can't hardly trust meat. It's PTSD. Think of this like a winning the lottery.
Q:Attempting to change the spark plugs in '00 Jeep Grand Cherokee. How do I get the plastic tubes off the plugs?
try twisting them
Q:How to connect the plastic pipe and the steel pipe joint?
The plastic pipe is outside and the steel pipe is inside
Q:would you prefer plastic tubes over metal tubes I'm doing statics so i wanna know ur opnion?
depends on the use and application. would you prefer orange juice or lemon juice ? depends on your taste...... same thing. so it depens on many thing : cost, fluid to flow, medium temp, pressure, humidity, load type and so on .... good luck.
Q:Has anyone tried to get inside those plastic balloons that come in the tubes?
wtf? plastic balloons in tubes?
Q:Have brittle and leaking ice maker plastic tubing in GE refrigerator - Model TPX24BPDABB?
You can replace the line with copper. If the connection point is metal you'll want to use a brass compression nut (brass) with a (brass) compression sleeve (know as a ferrules) if the connection point is plastic you'll want to use a nylon compression fitting. The metal ferrules one wont work as you would need to crank the you know what out out it to make it seal, and run the risk of stripping the plastic threads. The nylon takes less torque to seal if that makes sense as its a more dense material. You should be able to get all the parts from a local hardware store or big box store such as lowes or homedepot.

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