HDPE PIPE ISO4427-2000 DN280

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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:How are plastic tubes filled with adhesives or sealants?: Plastic tubes filled with adhesives or sealants are typically filled using a specialized filling machine. The machine is equipped with a nozzle that is inserted into the tube's opening, and the adhesive or sealant is pumped into the tube under pressure. Once the desired amount is filled, the nozzle is removed, and the tube is sealed to prevent any leakage.

Q:If you have a CPAP machine with a nasal mask, and it is new, does the smell of the plastic make you feel ill? Anyone have this experience, and what did you do about it ?: At first it will smell but as the other person stated, wash it a few times. The smell will go away. If the mask is leaking, you may not have it adjusted correctly. It could be too loose. Try to tighten the straps a little. Keeping the silicone seal clean helps it have a better seal. If is the air pressure bothering you, dont turn the machine on until you are ready for bed. Try waiting until you are quite tired. Go to bed, turn the machine on, hit the ramp up, put the mask on and go to sleep. By the time the pressure increases, you will be asleep and wont be bothered by it. It does take a little getting used to, but it is well worth the work. If you are still having problems, talk to your dr, that's what they are there for! Remember, people DIE from apnea, if you didnt need the cpap, your dr would not have given it to you. Be proud to be a hosehead!

Q:Can plastic tubes be used for pool equipment?: Yes, plastic tubes can be used for pool equipment. They are commonly used in pool plumbing systems for various applications such as pool filtration, water circulation, and chemical dosing. Plastic tubes are lightweight, durable, and resistant to corrosion and chemicals, making them a suitable choice for pool equipment.

Q:Can plastic tubes be used for chemical dispensing?: Yes, plastic tubes can be used for chemical dispensing. They are commonly used in various industries such as pharmaceutical, laboratory, and manufacturing, where they offer advantages like chemical resistance, durability, and ease of use. However, it is essential to select the appropriate type of plastic tube that is compatible with the specific chemical being dispensed to ensure safety and efficacy.

Q:i am designing something that has a frame of tubing that its relaxed when there is no air pressure in it, but becomes straight and reletivley rigid when when you put air presure in 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:How are plastic tubes recycled?: Plastic tubes are recycled through a process that involves sorting, cleaning, shredding, melting, and reforming. First, the tubes are sorted based on their plastic type and color. Then, any contaminants are removed through a thorough cleaning process. Next, the tubes are shredded into small pieces. These shredded pieces are then melted and formed into small pellets or granules. These pellets can be used to manufacture new plastic products, including tubes, or can be used as raw materials in various industries.

Q:This is for an engineering class. The tower cannot have any supports and must extend horizontally over 7 feet without touching the floor. It can bend. It is also going to be extended from a 1.5 inch plastic tube. Please answer ASAP! Need answer before 11/28/07. Thanks: Sounds like you're describing a cantilever. Not so much a tower as a section of a bridge, yes?

Q:it is too short as it allows water backup from my discharge pipe. does anyone have any idea's how I can extend my gooseneck deeper into my discharge pipe so water does not back up?and no, I do not have a blockage. my plumber told me my washer discharge gooseneck is too short. it needs to go 8 to a foot into pipe.: If your 6 gooseneck has a plastic discharge try anti-biotics and see a urologist

Q:How do you prevent plastic tubes from deteriorating?: To prevent plastic tubes from deteriorating, it is important to store them in a cool and dry location away from direct sunlight and extreme temperatures. Regular cleaning and maintenance should also be performed to remove any residue or contaminants that can weaken the material. Additionally, using appropriate cleaning agents and avoiding harsh chemicals can help prolong the lifespan of plastic tubes.

Q:What are the different diameter ranges available for plastic tubes?: The diameter ranges available for plastic tubes vary depending on the specific application and manufacturer. However, commonly available diameter ranges for plastic tubes can range from as small as a few millimeters to several inches in diameter.

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