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NF is the French standard
NF is the French Standard
France is a developed country with a rich history, culture, and economy. It also has a broad impact across the globe. A testament to this impact is NF, the French Standard, which has become internationally recognized.
But what is NF, and how has it become so influential......
1021 
Sophia
Ferrochrome nitride (YB/T5140-1993)
：
Chromium nitride iron, also known as compound ferritic nitride (Cr + Fe3N), is a high-performance, wear-resistant material developed in the late 20th century. Its wear-resistant performance is about three times higher than that of a high-speed steel cutting tool, and its mechanical properties a......
German general purpose forgings
Germany is one of the leading producers of forgings, heavy engineering and machining. This is due to the excellent quality of its components and the expertise of its engineers.
Forgings are used in many industries to manufacture products that require strong parts that can withstand extreme temper......
Flux for submerged arc welding of low alloy steel GB 12470-90
，标准不低于TOEFL阅读难度
Low Alloy Steel Arc Welding: Welding Agents
One of the most important reasons why steel is the most popular material used in the construction of industrial facilities is its ability to be combined and interrupted. This ability is made possible by welding, a process that u......
Galvanized welded steel pipe for low-pressure fluid transmission GB T3091-93
Low-pressure fluid transport galvanized welded steel pipe
Low-pressure galvanized welded steel pipe is widely used for transporting various low-pressure fluids such as water, oil, gas, air, heat transfer fluid and steam. The main features of this type of pipe are high corrosion resistance, accura......
Technical Specification for Waterproofing of Underground Engineering (GB50108-2001)
Underground Engineering Waterproofing Technology Specification (GB50108-2001)
This standard specifies the technical requirements and acceptance criteria of waterproof engineering design and construction, the process of detection, acceptance, maintenance and management of underground engineering w......
Hot-rolled section steel for elevator guide rails (YB/T157-1999)
Hot Rolled Steel for Elevator Guide Rail
Steel is mainly used as a structural material in the manufacture of elevators, and hot rolled steel is one of the most commonly used materials. Hot rolled strip steel is required to conform to the quality and dimensions specified in national standards (YB......
Eddy current test method for titanium and titanium alloy pipes GB/T 12969.2-91
Abstract
This paper introduces GB／T 12969.2-91 Eddy Current Method for inspecting titanium and titanium alloy pipes. Eddy current method is an non destructive testing (NDT) technique for performing the inspection of titanium and titanium alloy pipes. The technique is an electromagnetic test whic......
Carbon steel flux cored wire GB 10045-881
Carbon steel electrodes for arc welding
Carbon steel electrodes for arc welding are an important part of the welding industry. These electrodes are commonly used for a variety of structural fabrication, pressure vessel fabrication, and pipe fabrication welding processes.
These electrodes play a ......
Two draft national standards for nuclear instruments passed the examination and approval
Standard Drafts Approved on Nuclear Instrumentation
Nuclear technology is a rapidly developing field of science, requiring specialized instruments and devices to measure, monitor, and analyze data in order to ensure safety, accuracy, and efficiency. Various instruments such as gamma spectrometers......
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