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Requirements for custom flanges:
1. Flange dimensions and type: Specify the desired dimensions of the flange, including inner diameter, outer diameter, bolt hole diameter, number of bolt holes, and bolt hole arrangement. Additionally, determine the type of flange required, such as blind flange, weld neck flange, threaded flange, etc.
2. Material selection: Choose the appropriate material for manufacturing based on the operating environment and application requirements. Common flange materials include carbon steel, stainless steel, alloy steel, cast iron, etc. Depending on the nature of the medium, special materials such as corrosion-resistant materials or high-temperature materials may be required.
3. Flange standards: Determine the applicable flange standards, such as ANSI (American National Standards Institute), ASME (American Society of Mechanical Engineers), DIN (Deutsches Institut für Normung – German Institute for Standardization), etc. Different standards have different dimensions, materials, and manufacturing requirements.
4. Surface treatment: Specify the surface treatment requirements for the flange, such as painting, galvanizing, corrosion-resistant coatings, etc. This depends on the operating environment and the desired appearance or corrosion resistance performance.
5. Inspection and certification: Depending on the requirements, confirm whether flange inspection and certification are needed. This may include material test reports, dimension inspections, pressure testing, non-destructive testing, etc.
6. Other requirements: Depending on specific application needs, there may be additional customization requirements, such as flange sealing performance, temperature or pressure range, special connection requirements, etc.
When providing the requirements for custom flanges to a manufacturer or supplier, it is important to describe your needs in detail and provide relevant technical specifications, drawings, or design requirements. This will help ensure that the provided flanges meet your expectations and application requirements.