DN200 water supply plastic coated composite steel pipe manufacturing
1. Introduction DN200 water supply plastic-coated composite steel pipe is a new type of pipeline material, which combines the strength of steel pipe and the corrosion resistance of plastic coating, and is widely used in water supply, drainage, fire protection and other fields. The product has the characteristics of excellent pressure resistance, long service life and low maintenance cost, which is favored by the market. Plastic-coated steel pipes for water supply
Second, the manufacturing process.
The manufacturing process of DN200 water-coated plastic composite steel pipe mainly includes the following steps:
1.Steel pipe pretreatment: The surface of the steel pipe is rusted and cleaned to ensure that the surface is smooth and free of impurities. Pretreatment is one of the key links in the manufacture of plastic-coated composite steel pipes, and its quality directly affects the adhesion and service life of the coating.
2.Coating: Coating the surface of the pretreated steel pipe with a plastic powder so that it evenly covers the pipe body. During the coating process, the coating temperature and coating time need to be strictly controlled to ensure that the coating thickness and uniformity meet the requirements.
3.Melting: The plastic powder on the surface of the steel pipe is melted and bonded to the pipe body by heating at high temperature, forming a tight coating. The melting process needs to pay attention to the temperature and time to avoid damage to the pipe body.
4.Cooling: The molten steel pipe is cooled to make it shaped. During the cooling process, the cooling rate needs to be controlled to avoid deformation of the pipe body or internal stress.
5.Testing: Conduct quality inspection of finished steel pipes, including the detection of coating thickness, adhesion, pressure resistance and other indicators. Only the steel pipes that pass the test can be sold out of the factory.
Third, the key points of manufacturing.
In the manufacturing process of DN200 water-coated composite steel pipe, the following points need to be noted:
1.When the steel pipe is pretreated, appropriate rust removers and cleaning agents should be selected, and the operation should be carried out in strict accordance with the process requirements to ensure the surface quality of the pipe body.
2.During the coating process, the coating temperature and coating time should be controlled to prevent the coating from being overheated or too thin, which will affect the product quality. At the same time, the operation status of the coating equipment should be checked regularly to ensure the normal operation of the equipment.
3.When melting, the heating temperature and heating time should be strictly controlled to avoid local overheating or long-term high temperature of the pipe body, so as not to cause deformation of the pipe body or cracking of the coating.
4.During the cooling process, the cooling rate should be controlled to avoid internal stress or deformation of the pipe body. At the same time, it is necessary to keep the cooling environment clean and prevent debris from adhering to the surface of the pipe body.
5.In the quality inspection process, appropriate testing equipment and methods should be selected to ensure the accuracy and reliability of the test results. For unqualified products, they should be reworked or scrapped in time. At the same time, it is necessary to do a good job in quality recording and traceability in the production process, so as to find and solve problems in time.
Fourth, quality assurance measures.
In order to ensure the manufacturing quality of DN200 water-coated composite steel pipes, enterprises can take the following quality assurance measures:
1.Establish a sound quality management system, clarify the responsibilities and work standards of each position, and ensure the controllability and traceability of the production process.
2.Strengthen staff training and technical communication, improve the skill level and quality awareness of employees, so that they can better implement process requirements and operating procedures.
3.Formulate strict inspection standards and inspection procedures, conduct comprehensive quality inspection of raw materials, semi-finished products and finished products, and prevent unqualified products from flowing into the next process or factory sales.
4.Regularly maintain and maintain the production equipment to ensure the stability and reliability of the equipment. For key equipment or process links, the best monitoring or automatic control technology can be used to improve production efficiency and product quality.
5.Establish a customer feedback mechanism, collect and process customer feedback information in a timely manner, and continuously improve the quality of products and services. At the same time, customer satisfaction surveys can be carried out regularly to understand the needs and expectations of customers, and provide a basis for continuous improvement of the enterprise.