High-Pressure Flange, Non-Standard Machined Parts

High-pressure flange non-standard machined parts are critical components in the petrochemical industry, used to connect pipelines, valves, pumps, and other equipment, especially in high-pressure, high-temperature, or corrosive environments. The following is a detailed description of high-pressure flange non-standard machined parts:

1. Overview of High-Pressure Flanges

• Definition: A high-pressure flange is a disc-shaped part used to connect pipelines or equipment, usually forming a detachable sealing structure through bolts and gaskets. Non-standard machined parts refer to customized flanges whose dimensions, materials, or designs exceed national standards (such as GB/T9119-2000, maximum size DN2000).
• Features:
  • Oversized or Special Design: High-pressure flanges usually refer to flanges larger than DN2000 or with pressure ratings higher than PN400 (European system) or Class 2500 (American system), which need to be customized according to engineering drawings.
  • Production Process: The main processes are forging or rolling. Rolling has a lower cost, but oversized flanges may not be forgeable and need to be calculated based on theoretical weight (without subtracting the weight of the waterline, spigot, bolt holes, etc.).
  • Material: Common materials include stainless steel (such as 316L), carbon steel, alloy steel, and tungsten steel can also be used in specific wear-resistant applications.

2. Applications in the Petrochemical Industry

High-pressure flange non-standard machined parts are widely used in the petrochemical industry, especially in the following scenarios:

• High-Pressure Pipeline Connection: Used in high-pressure systems such as oil refining, natural gas transportation, and chemical reactors to ensure the sealing and reliability of pipeline connections.
• Corrosion and High-Temperature Resistance: Petrochemical environments often involve acidic, alkaline, or high-temperature media. Non-standard flanges can be made of corrosion-resistant materials (such as 316L stainless steel) or special coatings to meet harsh working conditions.
• Customized Requirements: Petrochemical equipment (such as high-pressure reactors and heat exchangers) often requires non-standard sizes or special sealing surfaces (such as RTJ ring groove faces) to adapt to specific pressure and temperature requirements.
• Synergistic Effect with Tungsten Steel Bushings: In pump or valve systems, high-pressure flanges are often used in conjunction with tungsten steel wear-resistant bushings. The former ensures the sealing of the pipeline connection, while the latter protects the shaft from wear, jointly improving equipment life and operational stability.