Name: siphon drainage pipe fittings, pipe fittings drainage layer specifications: DN56 --- DN315 advantage * Siphon rainwater system is widely used in a variety of different types of buildings use; * suspension without slope pipe laying; * Reduced pipe * reduce the amount of construction site;; the diameter * use less material; * save installation space; * pipe has self-cleaning ability, clogging; * from design to construction of simple and quick. Only siphon water system piping 1. cross trunk without waviness, rarely occupy the house ceiling space. 2. Less water bucket and a riser, a riser with up to 10 water bucket, water bucket larger catchment area. 3. The minimum amount of earthwork development. The higher the relative gravity rainwater drainage system efficiency. Siphon roof rainwater drainage system is to use a dedicated roof funnel rainwater to achieve gas-water separator. At the start due to gravity, so that rain water pipe creates a vacuum inside, when the tube was pressure water flow state, the formation of a siphon phenomenon, ongoing drainage, and ultimately achieve full flow conditions within the storm sewer. In rainfall, due to continuous siphon effect, the entire system to quickly discharge rainwater on the roof. Siphon pipe drainage system according to the state of full flow design of pressure, rain suspension tube can be done without laying slope when the siphon action, flow velocity is high, there is a good self-cleaning effect. HDPE siphon drainage system uses high-density polyethylene pipe, the pipe can withstand greater impact, and will not bend and break, break, also resistant to corrosion, its anti-extreme temperature range is large, at -30 ℃ 100 ℃, while the tube itself light weight, easy construction, installation efficiency can be greatly improved. ? Performance Review of cold resistance HDPE HDPE pipe filled with water after a pipe is frozen pipes will freeze happens with elastic stretch, once the ice melts, the pipeline can restore itself to its original state, the slightest damage will not occur. ? Qu immunity more joints, when settlement joint, song scrambling degree HDPE pipe can be adjusted within a certain range of anti. ? Wear HDPE (High Density Polyethylene) pipe has a high abrasion resistance, and its thick walls to provide additional protection.? CTE temperature change will alter the physical dimensions of HDPE pipe itself, its thermal expansion and contraction obvious Pipe significantly higher than other materials, the installation design must consider the possibility of expansion and contraction problems. ? Thermal water temperature reaches 80 ℃ (no mechanical force case) when, HDPE pipe is still safe to use. When the temperature reached 100 ℃, pipes can be used in a short time. ? Anti-force at room temperature, the compression performance of HDPE pipe is excellent. Under (about -40 ℃) high temperature or extreme cold conditions, the pipeline can still resist the force. ? Condensation HDPE is weak heat conductor, cooling process short, the pipe will not produce condensation. ? In the fire performance of HDPE pipe is flame retardant material, pipe in the fire will not burn and emit toxic gases. ? Firmness HDPE pipe whether fusion welded or hot-melt welding connections, since strength of the weld strength are higher than the pipe itself, the working pressure to meet the requirements. ? Noise HDPE tube is a soft material, a small elastic modulus E, the pipe can be limiting in air or a solid carrier for sound propagation. If special soundproofing requirements, by burying wall pipe, muffler pipe. Measures to achieve a silencer plastic film sound effects. ? Chemical resistance HDPE molecular structure (alkane structure) stable, strong pipeline chemical resistance. HDPE pipes chemical resistance are summarized as follows: At room temperature, insoluble in most organic and inorganic substances (other than addition of concentrated nitric acid, concentrated sulfuric acid and other strong oxidants); under conditions of greater than 90 ℃, dissolved in an aliphatic, aromatic hydrocarbons and chlorinated products. ? Solar radiation UV resistant black PE pipe, anti-aging, long service life of 50 years by adding carbon black, HDPE pipe can resist pipe caused by the sun's ultraviolet aging embrittlement. ? Anti-blocking wall is smooth and does not change over time, little friction, energy saving, the pressure loss of about 30% smaller than the pipe, the choice of smaller caliber than steel. Health and good performance, no additives, no possibility of contamination of drinking water, ISO standard polyethylene material rated for 0 (the lowest level), no mildew materials, compared with some other commonly used plastic materials, mold-resistant properties of polyethylene much higher, long-term use is not fouling. Aspects of water-resistant HDPE pipe is especially pronounced. With high displacement, anti-deposition characteristics. ? Soldering temperature can be welded polyethylene pipes, fittings and pipes into one, without the possibility of joint leakage, which will help save water, reduce operating costs, and inspection and maintenance costs, the pipeline can be made into any length can be flexible layout, saving fittings. Thermoplastic (sex) Material Handling on with high thermal efficiency. HDPE pipe metal lower than the soldering temperature, about 230 ℃. Simple welding tools to complete processing. PE pipe installation can be welded or fused to form a completely closed system impervious. ? Use of light weight, ease of installation, handling, connection, convenient and reliable construction. HDPE pipe can be designed for drainage systems. Under pressurized conditions, the use of HDPE pipe is determined by its maximum positive and negative pressure loads. NOTE: HDPE pipe pressure systems can be used in the vacuum system may also be used, since the part of the pipeline siphon water system under normal operating conditions of the system in a negative pressure state, and therefore the need for a negative pressure pipe testing, to ensure that the negative pressure-resistant pipe performance can meet the design requirements. HDPE basic physical and chemical properties of materials as follows: Item Unit Index experimental methods melt flow index G / 10min (2.16kg) 0.10 ~ 0.15 GB / T3682 density G / cm3 0.943 ~ 0.948 GB / T1033 tensile yield strength Mpa ≥22.0 GB / T1040 breaking elongation% ≤500 GB / T1040 glass transition temperature (TG) ℃ ≤-70 MRS Mpa 8.0 / 10.0 * GB / T6