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]

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:I've heard that women kind of envy fact that men can pee standing up BUT couldn't you women just achieve the same using a plastic small tube? Then, why not do it?: Some of us do when we're like hiking or cross-country skiing; it's more convenient, but personally it's easier normally sitting down.

Q:i was wondering what would cause oil to lightly spray out of the plastic tube that hangs down out of the top end of the piston. the tube comes out of the top end right before the exhaust header bolts onto the piston.: The link doesn't work - session is timed out. Always give year, make, engine size and model # when asking questions. We need all of that info to give an informed answer. I know what tube you are talking about. That tube is the breather hose for the power valve. As the piston rings start to ware, the oil in the premix doesn't get fully burned and accumulates on the power valve and lt's linkage. The engine is probably overdue for a top end rebuild and power valve cleaning. Remove the cover to see how much crud is in there. 2 stroke engines require rebuilds quite often, to prevent damage to the cylinder. If the top end is fresh, remove and clean the power valve. Otherwise clean the valve and replace the piston rings.

Q:Are plastic tubes recyclable?: Yes, plastic tubes are recyclable. However, the recyclability of plastic tubes can vary depending on the type of plastic used, local recycling capabilities, and specific recycling guidelines in different regions. It is important to check with your local recycling facility or municipality to ensure that plastic tubes are accepted in your area's recycling program.

Q:Can plastic tubes be used for storing chemicals?: Yes, plastic tubes can be used for storing chemicals. However, the choice of the plastic material and its compatibility with the specific chemical being stored is crucial to ensure safety and prevent chemical reactions or degradation of the tube material.

Q:How durable are plastic tubes?: Plastic tubes are generally quite durable, as they are resistant to moisture, chemicals, and corrosion. However, their durability can vary depending on the type and quality of plastic used.

Q:How do plastic tubes compare in cost to other packaging options?: Plastic tubes are generally cost-effective compared to other packaging options due to their low production costs, lightweight nature, and efficient use of materials.

Q:What is the minimum wall thickness of plastic tubes available?: The minimum wall thickness of plastic tubes available can vary depending on the specific type of plastic and manufacturing process. However, it is common to find plastic tubes with a minimum wall thickness ranging from 0.5mm to 1mm.

Q:What is the maximum temperature plastic tubes can withstand without deformation?: The maximum temperature that plastic tubes can withstand without deformation depends on the specific type of plastic being used. However, many common plastics have a maximum temperature range of around 150-200 degrees Celsius before they start to deform.

Q:I've seen some rock/alt musicians have this plastic tube attached to their microphone and it goes down to somewhere near the monitors? I don't actually know where it goes. But, they put their mouth on it and the microphone (at the same time I think) and they sing(?) into it and all these strange/cool sounding noises come out. What is it called? How does it work?Thank you!: You're talking about a musical vocoder, I think, although depending on what 'strange/cool sounding' noises come out you might be talking about a Sonovox.

Q:What's the meaning of the laying of brick and concrete structures with concealed pipes?: The wires are laid in bricks or concrete. If it is concrete, it is buried before pouring and tamping; the brick will be buried after the masonry is finished, and then the slot will be repaired.

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