DIN 2391 is a globally recognized technical standard for precision seamless steel tubes, established by the German Association for Standardization (DIN). Its widespread application in industries such as automotive manufacturing and hydraulic systems stems from its extremely high requirements for the

As of August 24, 2026, gold prices performed as follows:International Gold Prices: Spot gold briefly surpassed $4,650/ounce during the day, while New York gold futures even broke through $4,700/ounce. Since August, international gold prices have risen by over 13%.Main Reasons for the Current Gold Pr

A blind flange (also called a flange cover) is a removable sealing device primarily used to seal pipe openings, isolating and cutting off the flow of media. Unlike welded end caps, its biggest advantage is its ability to be easily disassembled and installed.Main Types and CharacteristicsBased on str

Metal fasteners are standard mechanical parts used to achieve detachable fastening connections between mechanical components. Their performance and quality directly affect the safety and lifespan of the entire equipment.1. Main ClassificationsBased on function, standard fasteners can be mainly divid

Bolts are among the most widely used fasteners. They typically consist of a head and a shank (a cylinder with external threads), and are used with a nut to fasten two parts with through holes, allowing for detachable connections.1. Performance Grade: Understanding the Numerical Code on BoltsThe bolt