Technical specifications and application of DIN 2632 flanges
The DIN 2632 standard regulates the design parameters of weld neck flanges intended for butt welding in piping systems. The products are designed for operation at a nominal pressure of PN 10 (10 kgf/cm²) and cover a range of nominal diameters from DN 10 to DN 3000.
The flange design includes a flat disk with mounting holes and a conical transition hub (neck), which ensures uniform distribution of mechanical stresses during welding to the pipe. This configuration is optimal for operation under conditions of high loads, vibrations, and temperature fluctuations in vessels, tanks, and main pipelines.
The technical documentation of the standard covers geometric dimensions, material selection, requirements for the roughness of sealing surfaces, and calculated product mass. Production processes, acceptance protocols, and marking are based on DIN 2519, and the types of sealing surfaces correspond to the DIN 2526 regulation.
Material execution
- Austenitic stainless steels.
- Carbon structural steels.
- Low- and high-alloy steels.
- Heat-resistant grades for operation at high temperatures.
Flanges made of C22 steel, manufactured according to DIN 2632 specifications, allow operation at temperatures up to 120°C without loss of nominal pressure characteristics. When the temperature rises in the range from 120°C to 300°C, the calculated working pressure is adjusted taking into account the reduction in the yield strength of the metal.
Important note: The DIN 2632 standard is considered historical and has currently been replaced by the current standard DIN EN 1092-1 (type 11B). EV Group China specialists recommend using the current regulatory framework when designing new assemblies.