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Internally and externally plastic-coated steel-plastic composite pipe and production method thereof

A steel-plastic composite pipe and production method technology, applied in the direction of pipes, coatings, rigid pipes, etc., can solve the problems of water supply safety and poor hygiene, and achieve the effects of good mechanical strength, convenient manufacturing and simple production methods.

Inactive Publication Date: 2011-07-20
GUANGDONG LIANSU TECH INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a plastic-coated steel-plastic composite pipe with good weather resistance, high temperature resistance, sanitation and non-toxicity according to the problems of existing steel pipes such as poor water supply safety and sanitation

Method used

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  • Internally and externally plastic-coated steel-plastic composite pipe and production method thereof
  • Internally and externally plastic-coated steel-plastic composite pipe and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Production of plastic-steel-plastic composite pipe inside and outside:

[0021] Phosphated steel pipe——>Remove burrs——>Preheat——>Inner material sprayed by vacuum adsorption method——>Electrostatic sprayed outer material——>Curing and leveling——>Cooling——>Marking packaging.

[0022] 1) Deburring: Use a spiral scraper to deburr the phosphated steel pipe, and the burr shall not be higher than 0.5mm;

[0023] 2) Preheating: The preheating temperature is 290℃, and the time is 20min. The preheating temperature and time can be adjusted according to the size of the pipe diameter;

[0024] 3) Inner coating: The inner coating process adopts vacuum adsorption method to spray, and the powder absorption can be adjusted according to the size of the pipe diameter;

[0025] 4) External coating: The external coating process adopts electrostatic spraying, and the spraying time is 20s;

[0026] 5) Curing and leveling: the temperature of the curing oven (ie curing temperature) is controlled at 200°C, a...

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Abstract

The invention discloses an internally and externally plastic-coated steel-plastic composite pipe and a production method thereof. The plastic-coated steel-plastic composite pipe comprises a steel pipe, wherein the outer wall of the steel pipe is coated with powder formed by blending polyester; and polyethylene (PE) or polyethylene of raised temperature resistance (PERT) powder is coated in the steel pipe. The internally and externally plastic-coated steel-plastic composite pipe combines high properties of steel, resin and two coatings and can effectively solve the problems that weather resistance and scraping resistance are low, the surface of the steel pipe is difficult to protect and small-thickness electrostatic spraying is inapplicable or sanitary property is low because only single powder is coated. The internally and externally plastic-coated steel-plastic composite pipe cannot influence the sanitary conditions of a conveying medium or the safety of drinking water.

Description

Technical field [0001] The invention relates to the field of steel pipe coating, in particular to an inner and outer plastic-coated steel-plastic composite pipe and a production method thereof. Background technique [0002] As a new type of pipeline with the performance advantages of steel pipe and plastic, steel-plastic composite pipe has broad prospects in applications, such as building water supply, gas transportation, fire water supply and other fields. Steel-plastic composite pipe products are mainly divided into two categories: plastic-lined and plastic-coated. The plastic-coated products are coated with different resin powder coatings on the inner and outer surfaces of the steel pipe. The performance and application of the different coating materials are different. . For example, the common plastic-coated composite steel pipes for cold water are mostly coated with polyethylene powder coating inside the steel pipe, and the outer layer is galvanized; there are also polyethy...

Claims

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Application Information

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IPC IPC(8): F16L9/147B21C37/06B05D1/00B05D7/22
CPCY02A20/20
Inventor 文巍伟方有泉高利
Owner GUANGDONG LIANSU TECH INDAL