General Principles of Gas Chemical Products Sampling GB 6681-86 “The General Principles for Gas Chemical Products Sampling” provides criteria for sampling variety of gas chemical products, as well as provisions and modeling diagrams of sampling device. This standard effectively protects the fair ......
The History of Grinding Machines
Grinding machines have been around for centuries and have been used in various industries for shaping, grinding and finishing various materials. They have evolved from manual labor to sophisticated machinery and are now used in many different industries for a vari......
G90 and G91 - Absolute and Incremental Positioning Commands in CNC Milling
CNC (Computer Numerical Control) milling is a powerful machining method used to machine complex components in various shapes, sizes, and forms with precision accuracy. To ensure precise motion control, CNC machines are equ......
GB/T 9788-1988 Hot Rolled Unequal Angles: Dimensions, Shape, Mass and Permissible Deviations
This standard applies to hot rolled unequal angles for use in structural engineering.
The size tolerance for dimensions such as width (tolerance for the range of ± 0.4 to ± 5 mm) and length shall be i......
GB/T 6725-1992 Cold-bent steel technical conditions
This general technical conditions for cold-bent steel GB/T 6725-1992 stipulates the order and technical requirements for the cold-bent of steel plates and narrow strips.
This code is applicable to cold-bent steel plates with thickness of ≤1.5......
Hot-Rolled Steel Bars
Hot-rolled steel bars are metal bars that are hot-processed from raw steel material, which is cooled and then processed through heat-treatments, depending on the grade and application of the metal bar. Hot-rolled steel bars are produced at temperatures higher than 1900°F (1......
GB/T912-1989 Hot-rolled carbon structure and low alloy steel plate and strip
GB/T912-1989 is a technical specification issued by Chinas National Standardization Management Committee specifically for hot-rolled carbon structure and low alloy steel plate and strip. It regulates the requirements, te......
Low Alloy Structural Steel Technical Conditions GB 1591-1979 Introduction The formulation and promulgation of GB 1591—1979 “Low Alloy Structural Steel Technical Conditions” is mainly to promote the development and use of steel structures with excellent performances in our country. GB 1591—1979 ......
The bending diameter, weight and allowable deviation of heat-treated steel bars (GB 13014-1991)
In China, the bending diameter, weight and allowable deviation of heat-treated steel bars are stipulated by the national standard of GB 13014-1991.
1.Bending diameter
The bending diameter of heat-tre......