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Overview of the development status of plastic pipe industry
1) Rigid polyvinyl chloride (UPVC) pipe, 2) Chlorinated polyvinyl chloride (CPVC) pipe, 3) Polyethylene (PE) pipe, 4) Cross-linked polyethylene (PE-X) pipe, 5) Type three Polypropylene (PP-R) pipe, 6) Polybutene (PB) pipe, 7) Engineering plastic (ABS) pipe, 8) Glass fiber reinforced plastic (RPM) pipe, 9) Aluminum plastic composite (PAP) pipe, 10) Production of steel-plastic composite (SP) pipes, etc., plastic pipes and fittings. Use is a cross-industry and cross-departmental system engineering. The raw materials are petrochemicals. Provide the required special materials, the manufacturing will be arranged separately in the industrial and building materials industry (as a new type of building materials), and the products will be used in construction (residential) and agriculture and urban infrastructure.
In 2000, the world's total output of plastic materials was 163 million tons, an increase of 3.6% over 1999. In 2000, China had 10.8 million tons of synthetic resins, and the average annual growth rate of synthetic resin production in the past ten years was over 15%. In 2001, the output of plastic products in my country exceeded 10 million tons, (including the total output of enterprises with a scale of -F, which was approximately 22 million tons). From January to July 2002, the output of plastic products by enterprises above the designated size was 7,627,500 tons, a year-on-year increase of 13.9%. The rapid development of China’s plastic product processing industry has achieved world-renowned brilliant achievements thanks to the rapid development of the raw and auxiliary material production industries used in the production of plastic products, as well as the processing machinery and equipment and mold manufacturing industries. At the same time, the rapid development of the plastic product processing industry has also greatly increased Promoting the development of related industries, the synthetic resin, auxiliary and additive production, processing machinery and mold manufacturing industries with the plastic product processing industry as the core promote and coordinate the development of each other, forming a grand blueprint for the development of China's plastics industry.
Supply of main raw materials:
In 2001, my country produced 4.81 million tons of ethylene raw materials, a year-on-year increase of 2.3%. From January to July 2002, the cumulative output of plastic resins and copolymers of enterprises above designated size was 7.562 million tons, a year-on-year increase of 9.5%. The production of ethylene raw materials was 2.986 million tons, year-on-year An increase of 5.2%. my country's domestic plastic raw materials are in short supply, and the gap is made up by imports. The production status of ethylene in my country is that the quantity of ethylene cannot meet the market demand, and imports have reached 50% in the past five years; the second is that the quality of the variety cannot meet the market demand, and a large number of special varieties and special materials rely on imports. The third is that the scale of ethylene is far from reaching the scale of the world economy. Level. my country's ethylene equivalent demand will grow at a rate of 8.5%. By 2005, my country's total ethylene equivalent demand will reach 15 million tons. After transformation, expansion and new construction, the ethylene production capacity will reach more than 9 million tons, and the self-sufficiency rate will reach 60%. The production capacity of polyethylene is 2.59 million tons per year (low density is 703,000 tons, high density is 855,000 tons, and linear low density is 1.035 million tons). The world production capacity of polyethylene is 59.8 million tons/year. In 2005, the domestic market satisfaction rate of special synthetic resin materials reached more than 40%. The consumption of plastic raw materials is shown in the table below.
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2020-12-07
Characteristics and connection method of PE gas pipe
1. Features of PE gas pipe
1. Good hygiene performance: no heavy metal salt stabilizer is added during PE pipe processing, the material is non-toxic, no scaling layer, no bacteria breeding, and it solves the secondary pollution of urban drinking water.
2. Corrosion resistance: Except for a few strong oxidants, it can withstand the erosion of a variety of chemical media; no electrochemical corrosion.
3. Long service life: PE pipes can be used safely for more than 50 years under rated temperature and pressure conditions.
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2020-12-07
PE gas pipe hdpe gas pipe
PE gas pipe adopts gas polyethylene pipe with many excellent properties and is used in the field of gas transportation. The corrosion of steel pipes and cast iron pipes and the leakage of joints will be completely solved, thus ensuring the safe operation of the gas pipeline network system. The PE material selected for the PE gas pipe is an inert material, which can withstand the erosion of a variety of chemical media.
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2018-03-22
Ways to reduce the noise of PVC drainage pipes
While adding stabilizers to improve the chemical stability and strength of pvc pipes, the sound insulation performance of the plastic itself has been greatly weakened. Therefore, in the current situation of reliable mechanical performance of pvc drainage pipes, how to solve the problem of sound insulation and noise reduction has become a top priority. The author believes that we can start with the noise source and adopt the following improvement measures to improve its sound insulation performance:
①It is made into double-wall hollow sound-proof PVC drainage pipe
The special equipment for PVC pipe extrusion is modified, an intermediate mold is added between the inner and outer jacket, and the outer mold is modified to increase the intermediate distance to form a hollow cavity between the two walls, so that the plasticity of PVC will not be changed. But it can increase the damping of the pipe along the flow direction, thereby increasing
Strong sound insulation effect.
Using single-wall double-material PVC pipe
On the basis of the original single-wall PVC pipe, a secondary formula is carried out, that is, the porous sound-absorbing material formed by plastic foaming technology is used to increase the wall thickness to achieve the purpose of increasing the damping along the outer wall direction, so as to obtain a good sound insulation effect. A set of equipment needs to be added, thus increasing the manufacturing cost.
Muffled PVC drainage pipe
The PVC pipe is made into a muffled drainage pipe with spiral fins attached to the inner wall. At this time, its outer wall is still a PVC hard plastic pipe (to ensure the required strength of the drainage pipe), but a certain width of flexible and strong soft is attached to the inner wall Plastic spiral belt, which unloads part of the impact pressure of the water flow onto the spiral belt, thereby buffering the pipe wall.
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2018-03-22
What is the difference between PVC water supply pipe and PVC drainage pipe
1. Different purposes: one for water supply and one for drainage. PVC water supply pipes are mainly used for: a. Indoor water supply and reclaimed water systems for civil and industrial buildings; b. Buried water supply systems for residential quarters and factories; c. Urban water supply pipeline systems; d. Water treatment plant water treatment pipeline systems; e. Marine aquaculture; f. Garden irrigation, well sinking and other industrial pipes. PVC drainage pipes are mainly used for building drainage and domestic sewage drainage.
2. Different specifications: PVC water supply pipes have more specifications and models, and PVC drainage pipes have relatively fewer specifications and models, because the drainage system itself does not require too many specifications. Even with the same model (outer diameter), the wall thickness of the water supply pipe and the drain pipe are often different, because the water supply pipe requires pressure, and the drain pipe usually does not need to consider the pressure.
3. The price is different: This will not be explained in detail, and the specific price can be consulted by each manufacturer.
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