Large diameter socket weld flanges typically have diameters above DN1500, with primary materials including cast steel, carbon steel, stainless steel, alloy steel, and forged steel. Key product specifications include flange outer diameter, bolt hole center circle diameter, bolt hole diameter, number of bolt holes, flange thickness, pipe outer diameter, flange inner diameter, and theoretical weight of the flange. The production process for large diameter socket weld flanges includes forging, rolling, and assembly. Products with oversized dimensions can only be produced using rolling and assembly techniques, as there are no suitable raw materials or machinery for a single-piece mold. This product is usually customized based on customer-provided drawings. Due to the large occupied area, on-site assembly and welding at the product's usage site can be utilized. This can reduce shipping costs and minimize quality issues during transportation.

Large butt welding flanges are a type of piping component, referring to flanges with a neck and a round pipe transition that are焊接 to the pipe. They are known for their resistance to deformation, good sealing, and wide application. They meet the requirements for both rigidity and elasticity, featuring a reasonable transition with weld thinning, and the weld joint is spaced far from the mating surface to prevent deformation due to welding temperatures. They adopt a relatively complex trumpet-shaped structure and are suitable for pipelines experiencing significant fluctuations in pressure or temperature, as well as for high-temperature, high-pressure, and low-temperature pipelines. They are generally used for piping and valve connections with PN ratings above 2.5 MPa and on pipelines transporting expensive, flammable, and explosive media. The diameter of large butt welding flanges is usually above DN1500, with the main materials including cast steel, carbon steel, stainless steel, alloy steel, and forgings. Key product parameters include the flange outer diameter, bolt hole center circle diameter, bolt hole diameter, number of bolt holes, flange thickness, pipe outer diameter, flange inner diameter, and theoretical weight of the flange. The production process for large butt welding flanges includes forging, rolling, and assembly. Products that are too large in size can only be produced using rolling and assembly techniques, as there are no suitable raw materials or machinery for a single molding. These products are generally customized based on customer-provided drawings. Due to the large area occupied by the product, on-site assembly and welding at the place of use can be carried out, which can reduce shipping costs and minimize quality issues during transportation.