In the pharmaceutical equipment industry, stainless steel is the main material used in pharmaceutical equipment, and the material cost accounts for more than 70% of the total manufacturing cost.As the upstream industry of pharmaceutical equipment, stainless steel industry needs to timely understand the needs of pharmaceutical equipment enterprises, and provide one-to-one solutions for scientific selection and reasonable use of materials, so as to achieve both safety and reliability, and reduce the cost of enterprises.Pharmaceutical equipment enterprises need to have a deep understanding of the characteristics of stainless steel used in the industry, welding process, forming process and so on.
Classification of stainless steel
At present, conventional stainless steels such as 304 and 316 are mainly used in the pharmaceutical equipment industry. However, there is not enough understanding and application of new steels such as duplex stainless steels and ferrite stainless steels developed in China in recent years.
Stainless steel selection
In the pharmaceutical equipment industry, the main downstream group is pharmaceutical enterprises, while the pharmaceutical industry belongs to a special industry. Under the environment of acid and alkaline change and high and low temperature, the material corrosion or product pollution occurs.These problems need to be taken seriously when choosing stainless steel materials.
Stainless steel welding process
After selecting suitable stainless steel materials, the welding process, welding requirements and testing requirements will also change. Therefore, for pharmaceutical equipment enterprises, it is a big project to choose materials.
Take the clean pipeline in pharmaceutical equipment as an example, GMP, FDA certification and pharmaceutical production process all have strict requirements on the quality of pipeline weld.For example, injection water pipeline, material pipeline, pure steam pipeline and so on all need to provide pollution-free, corrosion-resistant, inner wall smooth and clean and other good medium transport environment.This also requires pharmaceutical equipment enterprises in the process of welding pharmaceutical equipment pipeline must be carried out in strict accordance with the requirements.
Industry says, although welding stainless steel is easier than welding aluminum, but stainless steel material has a specific property, prone to a lot of variables.Before welding, the stainless steel tube must be smooth without oxidation."The thickness of the stainless steel thin-walled tube is generally less than 3mm, and many enterprises in the welding, because the assembly and welding sequence is not appropriate, as well as the selection of welding process parameters is not reasonable, resulting in deformation of the tube plate welding, resulting in loose sealing, tube pull off the situation.
At the same time, in the process of pharmaceutical equipment production and pipeline installation, in order to control the quality of pipeline and engineering, in order to provide qualified products in line with the standards, manufacturers should first obtain high-quality, safe and reliable pipeline welding reports, and various certification systems should implement reasonable and effective whole-process management and control of pipeline welding quality.
In addition, pharmaceutical equipment manufacturing enterprises also need to understand the welding defects in the medium delivery environment and how to control these welding defects in the actual production process.
Stainless steel grinding and polishing process
Due to the impact of the environment is easy to be oxidized and rusted stainless steel, in addition, the surface of stainless steel after welding and other processes will generate a layer of oxidation, deterioration and hardening layer and small burr or acute corner burr edge, affecting the performance of the workpiece material itself, so the metal surface needs to be polished.
According to different grinding and polishing processing methods, can be divided into mechanical grinding and polishing, learning grinding and polishing, compound grinding and polishing, three methods.The industry said that for different metal materials, different use occasions, different requirements on the surface of the metal workpiece, need to use different grinding methods or a combination of several methods for processing, in order to make it meet the requirements of use.
Stainless steel forming process
Stainless steel processing molding process refers to the performance of stainless steel on stainless steel shear, folding, bending, welding and other mechanical processing so as to obtain the industrial production of stainless steel products required process.At present, there are mainly bending forming process, drawing forming process, flanging forming process and expanding forming process. According to different processing requirements, pharmaceutical equipment enterprises need to choose different processes.
Among them, bending forming is the forming method of bending plate, bar, pipe or profile into a certain shape and Angle.It is understood that the general 430 stainless steel plate bending forming easy cracking, and 304 stainless steel plate can avoid this phenomenon.
In addition to the need to understand the welding, processing, molding process of stainless steel, users also need to use and maintain the necessary understanding of stainless steel, in order to ensure the normal use of stainless steel, extend the service life.