HDPE PIPE 4427-1996

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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

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Q:how we can design a simple total head tube?
A tube with an open ends and connected straight (at right angle) into the side of a pressure container like a pipe or a vessel is called a piezometer. Fluid will rise in the tube equivalent to the static pressure in the container. In a pipe the fluid will probably also be moving and so will have some dynamic energy. If the tube tip has been bent 90 deg. and inserted ( preferably to the center) so that active end is facing upstream, the impact of the moving fluid will convert to additional height of fluid in the tube so that the total head will be the sum of the static equivalent plus the velocity equivalent in feet or meters. That tube is sometimes called an impact tube. The best arrangement is to close the active end of the tube and drill a hole at 90 deg near the end. This allows for the straight tube to be more easily inserted through a small round opening with a sealing gland to stop leakage. This short part can be metal and a clear plastic or glass tube extension fitted to it. A Pitot tube is a combination of the two types of tube and is commonly utilized to measure velocity by subtracting the two heads. It is used in any fluid, water or air, open or contained. However, the Pitot like most other pressure devices usually employs a gage rather than open tubes. The open tubes will limit the amount of pressure to be measured because for each pound of measured pressure (psig), water will rise 2.31 feet.
Q:How to remove dirt on the inner wall of plastic pipe?
In the first bowl upside down water, tap water can, do not need too much, and probably can usually wash water, then pour 84 disinfectant, and then put for a while, with a rubber glove hand cloth wipe dirt in the basin, can easily fix.
Q:What did I smoke, it was in a clear plastic tube?
Did it look like it could have been plant material? If so than it was probably weed. Edit: Marijuana is often smoked in a glass pipe or piece. It definitely could have been weed. And it doesn't always make you mellow, sometimes, especially your first few times it makes you giddy and really talkative like you said.
Q:What to use to fill empty space in a coin tube, for silver coins?
Cotton balls work fine, and won't damage the silver IF they are clean and you don't shake the tubes a lot. (Coin companies use cotton balls when shipping coins in tubes if needed.)
Q:What are the properties of acrylic plastic tubes?
I've no idea what to say
Q:Plastic Tubes/Lines Under 03' Volkswagen Jetta GLI. What are they?
The white ones are usually vacuum lines. Have you tried popping your fuel door or truck with the door switches yet?
Q:What is a socket connection?
The socket connection is that the pipe or pipe end is inserted into the socket of the connecting piece, and the well is sealed with the slope filling material in the annular gap.
Q:Can I substitute a cake decor tube for a plastic sandwich bag?
I think you mean a pastry bag... the tubes are the extensions that make the shape. If you don't have a pastry bag, use parchment paper. Just fold it into a cone and fold the top inside the cone so it doesn't open up. Shove the tube inside and you got a disposable pastry bag. Pour contents into the cone using a spoon and twist the bag closed. Make sure it's closed well so contents don't spill outside. You can fold it to any size, big or small, to pipe large objects or small fine detail.
Q:Chrome or Plastic air tubes for the high performance air kits?
well chrome ones will heat up more than the black plastic ones defeating the purpose of a cold air intake.
Q:Does the plastic tube in your subwoofer box matter on the bass?
Yes. The plastic tube is called a 'Port'. Its length and diameter are calculated to allow the speaker enclosure to breathe correctly. When music is playing, the speaker travels outwardly AND inwardly. When it moves it compresses air in the box. The compressed air actually restricts the movement of the speaker cone. This will affect the speakers response, especially at sub frequencies. So, the tube is designed to allow air to escape from the box thereby limiting air compression in the box. They are tuned to both the speaker and the box. If you remove the tube you can expect to hear undesirable speaker 'Waffling at high volume levels. Experiment for yourself. Remember, you may not notice much difference at low volume levels. Once you increase the volume and get the box really working, you will definitely notice a difference.

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