Basic knowledge of glass lined equipment

1. Overview

The glass lined equipment is made by coating the enamel with high silicon content on the metal surface, and by enameling at 950 ℃, making the enamel close to the metal iron substrate surface. Therefore, it has the double advantages of chemical stability and metal strength similar to glass.

Glass lined equipment is widely used in chemical industry, medicine, dye, pesticide, organic synthesis, petroleum, food manufacturing, national defense industry and other industrial production and scientific research, such as reaction, evaporation, concentration, synthesis, extraction, polymerization, saponification, mineralization, chlorination, nitrification, to replace expensive stainless steel and non-ferrous metals. Corrosion resistance: It has strong corrosion resistance for various concentrations of inorganic acid, organic acid, organic solvent, weak base and other media. However, it is not applicable to strong alkali, hydrofluoric acid and fluoride containing ionic medium, as well as phosphoric acid with temperature greater than 180 ℃ and concentration greater than 30%.

Glass lined equipment mainly includes reaction tanks, storage tanks, distillation tanks and condensers. The main standards for design and manufacture are GB150-1998 Steel Pressure Vessels, Supervision Regulation on Safety Technology for Pressure Vessels and HG2432-2001 Technical Conditions for Glass lined Equipment.

2. Selection of glass lined equipment

Glass lined equipment is a highly professional product, and non professionals know little about it. How to choose a good production enterprise and high-quality glass lining equipment is very concerned by the majority of users, and it is also an important problem that troubles users. Many users listen to the media publicity and the manufacturer's self publicity to choose the manufacturer, but after use, they find that the quality is very unsatisfactory, causing great losses to the enterprise, and sometimes they have to resort to the law. This is due to ignorance of glass lined equipment. For this reason, I will give you a detailed introduction to the matters and methods that should be paid attention to when purchasing glass lined equipment.

External quality and internal quality jointly determine the quality of glass lined equipment. The external quality can be determined by visual inspection and instrument detection, while the internal quality is the macroscopic or microscopic, tangible or intangible defects hidden in the equipment due to unreasonable material selection, forming, welding, surface treatment, honing, etc., and lax quality control of each process during the manufacturing process. Such defects will be exposed during the transportation, storage or use of the equipment, resulting in equipment failure. Internal defects cannot be detected by any means, and can only be minimized through strict quality management and scientific and reasonable process discipline. That is to say, in the manufacturing process of glass lined equipment, each process should be strictly controlled to ensure the quality of each equipment. However, under the current fierce market competition, many enterprises are difficult to achieve this. It is not uncommon for poorly manufactured and shoddy equipment in the market, which requires users to have certain identification ability to buy qualified products, find the defects of equipment, and urge manufacturers to continuously improve product quality.