Inadequate glass instruments flooding market experts recommend careful selection

At present, the market for glass instruments is disorderly and disorderly. Many counterfeit glass instruments and glass instruments are flooded with the market, which makes it very easy for companies to purchase inferior glass instruments. The Nantong Rudongfangfang company is in the interest of coveting its own interests. Under the impetus, inferior glass instruments were sold to enterprises using prices that were less than half of the market price. Related units were blindly pursuing cheap, purchased low-quality and inferior glass instruments, and suffered from breakage and bursting in production and use.

Example 1: A pesticide factory in Hunan Province uses a 3′*2000mm and 3′ elbow of a glass pipe from Nantong Rudong to form a large-sized pipe-type cooling device. After passing through the material, more than ten glass pipes have been cracked at the same time. As a result, the material was ejected and harmful gases permeated the entire factory. The direct economic loss was 200,000 yuan and the indirect loss was 500,000 yuan.

Example 2: In a chemical plant in the northeast China, 30 sets of φ230 type glass coolers in Tianjin were installed in the chloroacetic acid production plant. After the trial feeding, the temperature was only 70-80°C and 18 coolers burst, causing economic losses. More than 500,000 yuan.

Example 3: A chemical plant in a university in Hubei Province used more than 20 glass valves of a certain glass house in Nantong, such as East, to burst and splashed materials, causing two people to suffer economic losses of 400,000 to 500,000 yuan.

Example 4: A bromine plant in Tianjin used a glass condenser and tower section of a certain Nantong factory. After two weeks of production, the tower section was cracked, the cooler was broken, and the bromine liquid was ejected. 7-8 workers were present on the scene. All burned, the factory was forced to replace all glass equipment. Direct and indirect economic losses amounted to 700,000 yuan.

Example 5: A pharmaceutical company in Guangdong Province adopted a glass pipe and cooler from a certain household in the east of Nantong to produce various kinds of medicines. Within a half month, the coolers burst 15 pieces so that the workshop could not be normally produced, and a large amount of raw materials was used. Wasting, direct and indirect losses of more than 1 million yuan.

Borosilicate glass 3.3 is the only glass material that can be used to make chemical equipment under international standards. The international standard ISO3587 specifies that glass tubes and fittings used in chemical equipment must be manufactured using borosilicate glass 3.3. This is due to the excellent performance and process properties of this glass.

First of all, its low coefficient of expansion, good thermal stability, and its use of glass tubes and fittings can withstand 120. C temperature changes without breaking. Maximum operating temperature up to 400. C.

Second, the chemical stability of the glass is good. The United States has buried contemporary human tools in underground containers made of this glass, leaving 5,000 years as human information. Western countries have provisions for the annual retention of important government documents in such glass containers. In modern industry, whether it is to extract uranium 235 or chemically synthesize ribonucleic acid, such glass-made equipment must be used.

Third, this glass has good reworkability and can be processed into various shapes.

Fourth, this glass does not contain any heavy metals. Therefore, it will never contaminate the processed material. Therefore, both high-purity drugs and microelectronics industry reagents must be manufactured and contained using this material. Because of this, this kind of glass is listed as the only glass material that can be used to make chemical equipment by international standards.

Table 1 lists the status of various glass materials manufacturing chemical equipment. Thermal expansion coefficient*10-7/. C324055162 Thermal stability rod method 270 . C210. C600. C160. C120°C Good Chemical Stability Medium Good Excellent Good Poor Mechanical Formability Good Or Not Good Good Reprocessability Very Good Medium Hard Too Good Cost High Low Low Use Condition Widely Used Internationally Eliminated Domestic Only For Very Little Occasions Before the 1960s were eliminated Before the 1970s were eliminated. From the above table, it can be seen that the international standard 3.3 glass has become the safest and most reliable glass material used in all kinds of glass.

In response to counterfeit glass instruments on the market today, experts are also proposing to purchase glass equipment. Be sure to look for quality-assured glass equipment. Do not try to buy cheap products on the market to avoid injury and loss.