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]

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:Can plastic tubes be used for plumbing applications?: Yes, plastic tubes can be used for plumbing applications. Plastic pipes such as PVC (polyvinyl chloride) or PEX (cross-linked polyethylene) are commonly used in plumbing systems due to their durability, flexibility, and resistance to corrosion. They are suitable for both residential and commercial plumbing applications, including water supply lines, drainage systems, and irrigation systems.

Q:I am using a device to push small volumes (60-100cc) through a plastic tube with a length of approx 24 and a diameter of 1mm or less. I can control flow rate, generally 2-4cc/sec. The liquid has a higher viscosity than water. I am trying to determine the difference in pressure on the piston face (which remains a constant size) using different fluids with slightly different viscosities through tubing of the same length, and differences in pressure using the same fluid through different tubing lengths. Ie; Fluid A and Fluid B through Tube 1, and Fluid A through Tube 1 and 2. The tubes are the same material, same diameter, regardless of length. The pressure used to push the piston remains the same across all fluid/tubing combinations.: If the flow is not turbulent (no high speeds) and incompressible, and the tube is of circular cross section, then Poiseuille Law flow will ensue. In Poiseuille flow through a cylindrical pipe the velocity is largest along the centerline of the tube and diminishes to zero at the inner wall quadratically with distance r: v(r) = c (R^2 - r^2) with c a constant for given viscosity and pressure gradient ( delta(p) / L ) In Poiseuille flow through a cylindrical pipe the rate of flow (volume/second) is given by Qdot, where Qdot = ( Delta(p) pi R^4 ) /(8 eta L). (where eta is the dynamic viscosity of the fluid) Since the pressure difference Delta(p) is the pressure on the piston face - ambient pressure , let's call this (p - p0) , you have p - p0 = ( 8 eta L) * Qdot /(pi R^4) Using this Poiseuille' s Law you can calculate the pressure on the piston. You say at the end of your question that the pressure used to push is kept constant. In that case the flow rate you measure should be inversely proportional to eta and L.

Q:Are plastic tubes suitable for hydrostatic testing?: Yes, plastic tubes are suitable for hydrostatic testing.

Q:How does groundwater flow into a well pipe? It was a small bore well, made of plastic tubing: The plastic pipe is directly connected to the pump pressure head or above it, this kind of wells are put under the sealed pipe port, making porous tubes for drainage pipe plastic mesh winding tube, prevent the sediment being pumped out through the filter into the groundwater is pumped out.

Q:Can plastic tubes be easily cleaned or sterilized?: Yes, plastic tubes can be easily cleaned and sterilized. They can be washed with soap and warm water, and then sterilized using various methods such as autoclaving, steam sterilization, or chemical disinfection.

Q:I have forgotten the name of the breed altough i know it starts with sy. I just want to know if they can fit in a tube cage or will they get stuck? And what is the best breed to get if you do have a tube cage?: The bigger breed of hamsters are called Syrians. You are right about them not fitting in tubes. Once syrians grow to their full size, they tend to get stuck in the tubes of commercial cages like Crittertrail etc. The best way to avoid this is to give them a non tube wire cage, glass tank or non tube plastic cage. Dwarfs can fit into tubes but again dwarfs are generally shy of climbing vertical tubes, so if you have a tall cage with long vertical tubes, your dwarfs might never use it in their lifetime. I have a cage with lots of tubes but I have placed them horizontal to the ground so that my dwarfs use the tubes.

Q:When i go to my local fish store some tanks have a small piece of PVC pipe in them, its just sitting on the bottem of the tankwhats it for?: its so the fish have somewhere to go... i haveit specifically for my black ghost knofe and my blood parrot fish

Q:How long do plastic tubes typically last?: The lifespan of plastic tubes typically depends on various factors such as the quality of the material, the conditions they are exposed to, and how they are used. However, on average, plastic tubes can last anywhere from a few years to several decades.

Q:How do plastic tubes perform in low-pressure applications?: Plastic tubes perform well in low-pressure applications due to their flexibility, durability, and ability to resist corrosion. They can effectively transport fluids or gases with minimal risk of leakage or failure, making them a reliable choice for various industries such as plumbing, irrigation, and ventilation systems operating under low-pressure conditions.

Q:Are plastic tubes suitable for structural applications?: No, plastic tubes are generally not suitable for structural applications as they lack the necessary strength and durability compared to materials like steel or concrete.

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