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Novel steel pipe and manufacturing method thereof

A manufacturing method and technology of steel pipes, which are applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve problems such as inability to apply welding, unrepairable welding points of inner coating, easy combustion, etc., and achieve excellent anti-corrosion performance and production High efficiency and good weather resistance

Active Publication Date: 2015-05-20
联塑市政管道(河北)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing gas steel-plastic pipes are easy to burn during welding due to the polyethylene coating on the inner and outer surfaces, and the welding points of the inner coating cannot be repaired at all.
Can not be used for outdoor welding, only limited to indoor

Method used

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  • Novel steel pipe and manufacturing method thereof

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Embodiment Construction

[0020] The invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model.

[0021] like figure 1 As shown, the present application provides a new type of steel pipe, which includes a three-layer structure, namely an outer coating 1 , a steel pipe substrate 2 in the middle, and a galvanized layer 3 on the inner wall.

[0022] The specific process of pipe production is as follows:

[0023] 1. Surface shot blasting: Use shot blasting equipment on the outer wall of the steel pipe to remove the galvanized layer on the outer surface, and the surface cleaning level reaches B-Sa2 1 / 2 Sa3.

[0024] 2. Phosphating treatment: The process is alkaline degreasing→water washing→spray water washing→surface adjustment→phosphating→water washing→spray water washing. Among them ①. (mas...

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Abstract

The invention discloses a novel steel pipe which comprises a three-layer structure, wherein the three-layer structure is respectively an outer coating layer 1, a middle steel pipe basal body 2 and an inner wall zinc coating layer 3. The novel steel pipe provided by the application has the advantages that the manufacturing process is simple, the production efficiency is high, the fire retardancy and weather resistance of the outer coating layer are good, and the adhesive performance and antiseptic property are superior.

Description

technical field [0001] The invention relates to the field of steel-plastic composite pipe production, in particular to a novel steel pipe and a manufacturing method thereof. Background technique [0002] At present, most of the gas steel-plastic pipes in my country are coated with thermoplastic weather-resistant polyethylene anti-corrosion layer on the inner and outer surfaces of phosphating steel pipes. adhesion. It not only has the advantages of mechanical properties, toughness, good rigidity, and low heat shrinkage of steel pipes, but also has the characteristics of hygiene, corrosion resistance, slow scaling, and not easy to grow microorganisms like plastic pipes. In the actual use and installation process, the vertical installation method from the bottom to the high-rise is usually used to enter thousands of households, especially high-rise buildings. Due to the influence of other factors (such as wind, sun, rain, earthquake, etc.) on the safety of the pipeline, the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/147B23P15/00C23C22/07C23C22/78
Inventor 方有泉
Owner 联塑市政管道(河北)有限公司