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Accuracy class
，
Accuracy grades refer to the precision of measurements and are used in the quality control processes of many industries. An accuracy grade is a measure of the closeness of a measurement to its true value. This is a very important concept in the fields of engineering, physics, and chemistry, wher......
1048 
Cameron
Dimensional tolerances for electrolytic plates and rods of Japanese National Standards
Japan Standard Electrolytic Board and Rod Size Allowable Deviation
With the development of modern industry, electrical products are not only strong and durable, but also require precise size accuracy. The features of electronic components determine the characteristics of electronic products. Mech......
In 2008, a number of mandatory standards for the instrumentation industry will be formulated
Introduction
In 2008, a number of compulsory standards in the instrumentation and measurement sector will be implemented. These standards are set to provide additional certainty and quality assurance for manufacturers, consumers and industrial end-users who regularly use or are involved in the se......
Test method for strain aging sensitivity of steel (Charpy impact method) GB 4160-84
Introduction
Xiebisheng test is a common tool used in among metallographers. It is a specially studied impact test which is capable of telling the user stress-strain sensitiveness of particular materials. In this test, a sample of material is evaluated for its property of sensitizing to strain an......
Materials, design and construction standards for steel structures
Steel Structure Material, Design and Construction Standards
Introduction
The steel structure is a structure made of steel material, which is composed of steel beams, steel columns, steel trusses, and other components made of steel and steel plates. The steel structure can bear a certain amount o......
Construction and acceptance standards for welding engineering of steel structure and steel components
Welded Structural Steel Components Construction and Acceptance Standard
In order to standardize the construction and acceptance of welded structural steel components, ensure the quality of construction and acceptance, and reduce the cost of maintenance, this standard is formulated in accordance w......
GB 8650-88 Test method for resistance to stepped cracking of pipeline steel
GB 8650-88 provides a method for a fracture test that assesses the ability of steel pipelines to withstand different conditions. This test involves a pipe filled with water, the pressure of which is gradually increased. At each stage, the pipe is blocked off, and then examined afterwards to see if......
Agricultural composite steel (YB/T5003-1993)
Introduction
Farm use composite steel is a type of boneless steel. It is made of composite steel tube, cylindrical steel and flat steel. In 1993, the Ministry of Agriculture issued the national standard YB /T5003-1993 for farm use composite steel, which stipulated the production technology, size,......
GB 12827-91 standard reference acetylene carbon black and identification method
Carbon black refers to black powdery or granular material, which is composed of many tiny particles with the average particle size of between 10 and 2000 nanometers. It is composedot many carbon atoms buthydrophobic in nature. Carbon black can be prepared by pyrolysis of hydrocarbons such as coal ......
Evolution of GB/T 1220 Standard for Stainless Steel Bars
GB/T 1220 Standard Evolution of Stainless Steel Bars
The history of the development of a variety of industry standards and regulations, including those related to stainless steel bars (SSBs), began nearly two decades ago, when the standard of GB/T 1220 was initiated and announced in 1998. The sta......
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