Abstract: The following paper presents mechanical strength test results of a 160 x 9 mm PVC-U pipe, in the service of Municipal Water and Sewage Company since 1976, and the impact of the pipe material on the quality of water in contact. The water quality was evaluated in terms of the leaching of certain chemical elements from the pipe material to the water. Additional tests were carried out on the water obtained from different sections of the PVC-U plastics piping systems for the water supply. Chemical elements detection was performed with inductively coupled plasma optical emission spectrometry ICP-OES JY 238 Ultrace. Furthermore, the testing included the analysis of sediment found on the inside pipe wall, with the application of a Quanta 200 FEG Scanning Electron Microscope (SEM). Migration tests showed a clear influence of the pipe material on water quality which was in contact with the PVC pipe. The highest recorded value of lead in water samples was 162.2 ppb and significantly exceeded the allowable concentration of lead contained in Directive 98/83/EC of the European Union equal to 10 ppb. Leaching of this element from the pipe material into the water proves the use of lead compounds as stabilizers for the production of pipes. The study of the chemical structure by Infrared Spectrometry showed changes in the test samples, demonstrating the degradation of the material, however, without affecting its strength. But the degradation of the material may affect the migration of lead into the water. The analysis of sediment on the inside of the pipe wall allowed us to identify mainly calcium carbonates, oxides and hydroxides of iron and manganese and also sodium chloride. The elements

Abstract: The utility model belongs to a multifunctional PVC (Polyvinyl Chloride) pipe. The multifunctional PVC pipe comprises a PVC pipe body (2) and is characterized in that cable troughs (4) are formed in the two sides of the PVC pipe body (2), wherein a wire way (3) is formed in the PVC pipe body (2), and an upper cover (5) is arranged on the wire way (3). The multifunctional PVC pipe provided by the utility model is convenient and fast to install in an underground pipe gallery, labor saving and time saving effects can be realized, all cables and wires cannot be scattered outside, and the upper cover is arranged on the wire way, so as to provide good protection conditions for the wires; furthermore, the pipe gallery is neat and attractive in appearance.

Abstract: The invention discloses an integrated microenvironment high-efficiency ecological filter bed system. The system uses a PVC pipe as a support and integrates an ecological floating bed, a biological filling material, a biological filter material and blast aeration equipment to realize cooperative high-efficiency purification of contaminated surface water bodies like a river, a lake and a reservoir. The upper part of the ecological filter bed system is provided with the ecological floating bed to plant perennial aquatic water-purifying plants with strong stress resistance; the central part of the ecological filter bed system is provided with the porous netted filling material; and finally, the PVC pipe is used as the support to connect and secure the upper part, the central part and the lower part of the ecological filter bed system. The ecological filter bed system has the following advantages: the ecological filter bed system can be directly applied to sludge in surface water bodies like the river, the lake and the reservoir and to subsequent treatment after advanced treatment of effluent of domestic and industrial wastewater, has a certain landscape effect and a wide application scope, belongs to in-situ restoration technology for water bodies, poses no secondary pollution to surroundings and has low construction, operation and maintenance cost.

Abstract: The invention discloses a passive collection device and a passive collection method for volatile organic pollutants in soil gas. The passive collection device comprises a PVC (polyvinyl chloride) pipe and PUF (polyurethane foam) gas films, wherein effective energy reference objects are added to the PUF gas films and are fixedly mounted in the PVC pipe; the upper end of the PVC pipe is sealed and the lower end of the PVC pipe is open; small holes are distributed in the periphery of the pipe wall of the PVC pipe, so that gas flow entering the lower end of the PVC pipe flows out of the pipe. According to the device, the upper end of the PVC pipe can be sealed with aluminum foil; the two same PUF gas films added with the effective energy reference objects are fixedly mounted in the PVC pipe. In use, the device is vertically put into the soil in a downward opening manner, and the backfilling and compacting are performed; the recovery is performed after the collection cycle not less than 12 weeks; DCs are added to the PUF films, so that the collection rate problem of the soil gas is solved, the concentration of the organic pollutants in the soil gas is conveniently calculated, and the influence on the collection device caused by environmental factors (such as soil temperature and soil humidity) is avoided.

Abstract: The present invention relates to a rigid vinyl chloride pipe having excellent strength and resistance to water pressure. Especially, the present invention relates to a rigid impact PVC pipe having excellent strength and resistance to water pressure, prepared using a PVC poly vinyl chloride having a K-value of 72. The rigid impact PVC pipe resin composition of the present invention is formed by mixing 1 to 3 parts by weight of a Tin complex, 3 to 10 parts by weight of an impact reinforcing agent, 1 to 3 parts by weight of a processing material, and a methacrylate-based lubricant with respect to 100 parts by weight of a PVC resin having a K-value of 72.

Abstract: The invention discloses a rapid repairing technology for PVC pipe water leakage, and belongs to new leakage repairing technologies of PVC water drainage pipes The rapid repairing technology for PVC pipe water leakage is applicable to rapid repairing of joints and other portions of the PVC water drainage pipes in a house or a public place, wherein the joints and other portions of the PVC water drainage pipes crack and leak water The repairing method is simple, the repairing speed is high, working can be completed under the situation that normal use of the PVC pipes is not affected, the project quality can be ensured, the economic and social effects are remarkable, the operations such as wall penetrating, wall chiseling, pipe breaking again and casing pipe adding do not need to be carried out for leakage prevention, and the problems that large waste caused by traditional repairing of PVC leakage points and leakage repairing is difficult are solved

Abstract: The utility model relates to an online continuous PVC pipe modification production line, which comprises a feeder, an extruder, an extrusion die, a vacuum cooling setting box, a tractor, a chipless cutting machine and a pipe stacking frame, wherein the extrusion die is arranged at a pipe outlet of the extruder; a stretching and expansion die is arranged between the extrusion die and the vacuum cooling setting box. According to the production line, a PVC-U pipe produced by an extrusion method can be axially stretched and radially expanded on line to biaxially arrange PVC long-chain modules in the pipe in order by virtue of the stretching and expansion die, so that a PVC-O pipe with high strength, high toughness, high impact resistance and fatigue resistance is obtained; the material performance of the produced PVC-O pipe is far higher than that of an ordinary PVC-U pipe, the performance of the pipe can be improved while raw material resources can be saved, the cost of the pipe is lowered, and remarkable economic benefits and social benefits are achieved.

Abstract: The invention discloses a nanoscale compression-resistant PVC (Polyvinyl Chloride) pipe material. The PVC pipe material is prepared from the following raw materials in parts by weight: 100 parts of loose polyvinyl chloride resin, 20-30 parts of light calcium carbonate, 3-10 parts of a composite lead salt stabilizer, 0.5-2 parts of oxidized polyethylene wax, 2-6 parts of dioctyl phthalate, and 6-10 parts of a nanoscale anti-impact modifier. The preparation method of the PVC pipe material is simple in technology and low in production cost. The mechanical properties of the nanoscale compression-resistant PVC pipe material such as bending resistance, shock resistance and anti-pressure capability meet the requirements of JG 3050-1998.

Abstract: The invention discloses a hard polyvinyl chloride (PVC) pipe for feeding water and a production method of the hard PVC pipe. The production method comprises the following steps of (1) weighting all raw materials in parts by weight: 80-120 parts of PVC, 0.3-0.8 part of calcium stearate, 0.8-2.0 parts of basic lead sulfate, 0.4-1.0 part of stearic acid, 0.6-1.0 part of dibasic lead phosphite, 0.2-1.2 parts of carbon black and 0.2-0.6 part of lead stearate; (2) after kneading the raw materials in the step (1), carrying out double-roller mixing, smashing and extrusion molding as well as cooling shaping under the conditions that the temperature is 160-180 DEG C, the compression ratio is 2-4, and the length to diameter ratio is 20-25; (3) cutting a cooled product treated in the step (2) to obtain the hard PVC pipe for feeding water. Compared with the prior art, the hard PVC pipe has the following advantages of low price, relatively few raw materials, simple production process, relatively high strength, relatively stable physical property even if at relatively high water pressure, environment friendliness, no pollution and relative safety when used as a water pipe.

Abstract: The invention discloses a welding device for a PE (poly ethylene) film and a PVC (polyvinyl chloride) pipe in order to achieve the purposes of easiness and convenience in construction, firmness in welding and ensured project quality. The welding device mainly comprises a PE pipe, the PVC pipe and the PE film, the PE pipe is required to be one model larger than the PVC pipe and sleeved on the same, a gap between the pipes is fixed through a sealing material, and the PE film is directly welded to the PE pipe.

Abstract: The invention discloses a PVC (Polyvinyl Chloride) hose. The PVC hose is prepared from the following ingredients in parts by weight: 30-60 parts of PVC resin, 2-5 parts of polypropylene glycol terephthalate, 4-5 parts of polyvinyl butyral, 2-4 parts of triphosphate, 0.4-0.6 part of hydroquinone, 2-5 parts of organosilicon rubber compound, 10-15 parts of styrene-butadiene rubber, 1-3 parts of carbon black and 1-2 parts of paraffin. According to the high-toughness PVC pipe material disclosed by the invention, silicon carbide whiskers are used, so that the internal structure of the pipe material can be effectively strengthened, and the mechanical strength and toughness among pipe materials are improved. In addition, the aging resistance of the pipe material is improved; during production, a lubricant can enable the material to be more uniform, improves the lubrication smoothness of extrusion and also plays a role in strengthening the internal structure. The prepared PVC pipe material has the characteristics of high toughness and high mechanical strength.

Abstract: The invention discloses an impact-resistant pressure-resistant PVC (polyvinyl chloride) pipe which is prepared from the following components in parts by weight: 80-100 parts of PVC resin, 1-2 parts of plasticizer, 10-20 parts of zinc stearate, 1-2 parts of calcium carbonate, 5-10 parts of impact-resistant agent, 1-2 parts of aluminum hydroxide and 5-10 parts of paraffin. The impact-resistant pipe has the advantages of favorable toughness, favorable impact resistance, chemical corrosion resistance, higher tensile strength and higher elongation at break; since the toughness is favorable, the impact-resistant pipe can not easily have the phenomenon of water leakage, water seepage or rupture; and the MBS (methyl methacrylate-butadiene-styrene) resin is added into the PVC pipe to promote plastification and enhance the dispersity of inorganic substances and the processing flowability of the PVC melt, thereby enhancing the low-temperature impact strength of the product.

Abstract: The utility model relates to a novel hookah pipe with the cooling function. The novel hookah pipe comprises a nozzle, a cooling device and a pipe fitting device. The cooling device comprises an annular plastic barrel and resin gel sealed inside the annular plastic barrel. The pipe fitting device is a PVC pipe. The PVC pipe is detachably connected with one end of the annular plastic barrel, and the other end of the annular plastic barrel is detachably connected with the nozzle. The novel hookah pipe has the advantages of being simple in structure, durable, convenient to clean, clean, sanitary and capable of cooling smoke.

Abstract: The invention relates to a preparation technology of a composite PVC (polyvinyl chloride)-0 pipe. The preparation technology comprises the following steps of warming the PVC pipe at 80 DEG C-140 DEG C, assembling an outer sleeve and the PVC pipe, sealing the two ends of the PVC pipe by using a sealing tool or equipment and reserving an air inlet, filling air by using an air storing tank, fully fitting the outer wall of the PVC pipe and the outer sleeve, and cooling the PVC pipe and the outer sleeve by using water; and when the temperature of the PVC pipe is less than or equal to 60 DEG C, i/e/. the PVC pipe is formed, opening a sealing hole to discharge air, and combining the outer sleeve and the PVC pipe into a whole. The preparation technology provided by the invention has the advantages that the investment is less, manufacturing waste is easy to control, the multiple purposes are realized, and different outer sleeve materials are utilized to manufacture multiple pipelines of different applications. The preparation method is simple, easy to operate, very remarkable in economic benefits and used for different mining pipes. Compared with a common PVC pipe, the composite PVC-0 pipe has the advantages that the energy is saved by 30%-50%, the wall thickness is 50% of that of the PVC pipe, and the intensity of the common PVC pipe is achieved.

Abstract: The invention discloses a PVC pipe with the high structural strength, and relates to PVC pipes. The PVC pipe with the high structural strength mainly comprises a pipe body. The PVC pipe is characterized in that the pipe walls at the two ends of the pipe body are provided with holes, one side is provided with two to three holes, the holes are located in the same cross section circle of the pipe body, the outer wall of the pipe body is sleeved with metal covers, the inner surfaces of the metal covers are provided with positioning pins which are inserted into the holes, the metal covers at the two ends of the pipe body are connected through a metal connecting plate. The PVC pipe is simple in structure and reasonable in design; the structural strength of the pipe body is enhanced through the metal covers and the metal connecting plate, the pipe body is prevented from being crushed broken, and the PVC pipe is simple, practical and obvious in effect.