What are the standards for flange forgings, in the industrial field, flange forgings, as an important mechanical component, are widely used in the connection and sealing of pipelines, valves and other equipment. In order to ensure the quality and performance of flange forgings, a series of strict standards and specifications came into being.
First, the material standard.
The materials used in flange forgings should comply with relevant standards and specifications, and generally use high-quality carbon steel, alloy steel and other materials. These materials should be characterized by high strength, corrosion resistance, and wear resistance to ensure reliable operation under extreme operating conditions. In addition, the chemical composition, mechanical properties and other indicators of the material should also strictly meet the requirements of the standard.
2. Size and tolerance standards.
The size and tolerance of flange forgings are the key factors affecting their connection and sealing performance. There are differences in the standard system in different countries and regions, such as China, the United States, Europe and other places. However, in general, these standards stipulate the size requirements such as diameter, thickness, bolt hole diameter and other dimensions of flange forgings, as well as various tolerance ranges to ensure their interchangeability and versatility.
3. Surface quality standards.
The surface quality of flange forgings is critical to their service life and performance. The standard puts forward requirements for the surface quality of flange forgings, including surface roughness, non-destructive testing standards, etc. The surface roughness should meet the design requirements, and the non-destructive testing standard specifies the type, detection method and acceptance criteria of the surface defect. These standards are designed to ensure that flange forgings maintain good corrosion and wear resistance during use.
Fourth, mechanical property standards.
Mechanical properties are one of the important indicators to evaluate the quality of flange forgings. The standard stipulates the mechanical properties of flange forgings such as tensile strength, yield point, elongation, etc. These indicators need to be determined by material testing and in-process inspections to ensure that the flange forgings meet the design requirements when subjected to loads.
Fifth, the production process standards.
The production process of flange forgings includes blanking, heating, forming, forging, cutting and other links. The standard stipulates in detail the process, parameters and operation specifications of the production process. In addition, for special-purpose flange forgings, it is also necessary to formulate corresponding production process standards and quality control measures to ensure that their special properties meet the requirements.
6. Inspection and test standards.
In order to ensure the quality and performance of flange forgings, the standard stipulates strict inspection and test procedures. It includes raw material inspection, process inspection, finished product inspection and other links, as well as corresponding test methods and acceptance standards. Through these inspections and tests, the quality of flange forgings can be effectively controlled to ensure their safety and reliability during use.
7. Packaging and transportation standards.
Flange forgings need to be properly packed during transportation to prevent damage or contamination during transportation. The standard stipulates the packaging materials and protective measures of flange forgings. In addition, for large flange forgings, it is necessary to develop a corresponding lifting and transportation plan to ensure that the product is delivered to its destination safely and smoothly.
The standards for flange forgings cover many aspects such as material, size and tolerance, surface quality, mechanical properties, production process, inspection and testing, packaging and transportation.