An outer galvanized inner plastic-coated pipe fitting and its production process
A production process and technology for plastic pipe fittings, applied in the field of outer galvanized inner plastic coated pipe fittings and their production processes, can solve the problems of easy peeling of the coating and poor adhesion, and achieve product quality assurance, high production efficiency, adhesion and impact. and other stable performance
Active Publication Date: 2016-03-30
ZHONGSHAN LESSO WALTON COATING STEEL PLASTIC PIPECO LTD
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Problems solved by technology
In the patent CN2379688: "External galvanized internal plastic-coated tap water pipe fittings", no specific manufacturing process is mentioned. At present, whether it is external galvanized internal plastic-coated pipes or pipe fittings, there are generally poor adhesion and easy peeling of the coating. and many other defects
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[0015] An outer galvanized inner plastic-coated pipe fitting comprises an outer galvanized layer 1, a malleable steel part base 2, and an inner layer of polyethylene or epoxy / polyester coating 3.
[0016] The specific production process of the outer galvanized inner plastic-coated pipe fittings is as follows:
[0017] A Sand blasting on the inner wall: sand blast the inner wall of the pipe fittings with a sand blasting machine to remove the galvanized layer. Note that the outer galvanized layer must not be damaged.
[0018] B Neutral degreasing and decontamination: ① The ratio of slotting chemical solution is 12%. Fill the tank with water until it is 80% full, and add it slowly while stirring. It can be added flexibly according to the degreasing effect and the degree of oil pollution. ② . Processing time was 7 minutes. Clean up the oil on the liquid surface in time. When the tank liquid is seriously dirty and the effect of adding liquid medicine is not obvious, it shou...
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The invention relates to an outer galvanized inner plastic-coated pipe fitting and a production process thereof. In order to overcome the shortcomings in the above-mentioned prior art, the present invention provides an outer galvanized inner plastic-coated pipe fitting and its production process. . The base (2) of malleable steel parts also includes polyethylene or epoxy / polyester coating (3). A production process for the above-mentioned outer galvanized and inner plastic-coated pipe fittings, comprising the following steps: sandblasting the inner wall of the galvanized pipe fittings, neutral degreasing, hot water cleaning once, hot water washing twice, preheating, braces installation, powder coating , lower braces, curing and leveling, inspection, thread rust prevention, packaging and storage. The plastic coating process involved in this patent is easy to operate and high in production efficiency. After the inner wall is phosphating and sandblasting, it has good adhesion and is not easy to separate. Product quality is stable.
Description
technical field [0001] The invention relates to the steel-plastic composite pipe technology, in particular to an outer galvanized inner plastic-coated pipe fitting and a production process thereof. Background technique [0002] With the rapid development of our country's economy and the continuous improvement of people's lives, the pipe processing industry has also developed rapidly, making great contributions to the national and local economies. Internal and external galvanized pipe fittings occupy a considerable proportion in the domestic market, and issues such as sanitation, environmental protection, energy saving and emission reduction have become increasingly prominent. After the Hong Kong Taxation Office issued a notice in 1995 to prohibit the use of enamelled galvanized steel pipes for drinking water supply equipment in houses, in 1998 the Shanghai Municipal Construction Committee also issued a notice prohibiting the use of food-belly steel doors and windows and galv...
Claims
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IPC IPC(8): F16L9/147
Inventor 方有泉
Owner ZHONGSHAN LESSO WALTON COATING STEEL PLASTIC PIPECO LTD