Technical specifications and scope of the DIN 2558 standard
The DIN 2558 standard regulates the design parameters of oval threaded flanges intended for use in piping systems with a nominal pressure of PN 6 (6 kgf/cm²). This documentation covers a wide range of nominal bores from DN 10 to DN 1200, establishing key requirements for geometric dimensions, material composition, and calculated product weight. The standard was developed by experts in the field of boiler plant design and industrial piping to ensure joint tightness.
Material specification
For the production of flanges according to the DIN 2558 standard, EV Group China uses high-quality steel grades that ensure operational reliability under specified pressure and temperature conditions:
- Corrosion-resistant (stainless) steels for aggressive media;
- Carbon structural steels;
- Alloyed steels with enhanced strength characteristics.
Parameters for custom orders
To ensure full compliance of the product with design documentation when placing an order with EV Group China, the following data must be provided:
- Type size and design version of the flange;
- Geometry and type of sealing surface;
- Exact nominal dimensions (DN);
- Tolerances and limit deviations;
- Parameters and type of thread to be cut;
- Technical specifications of fasteners (bolts/studs);
- Requirements for the cleanliness and condition of sealing surfaces;
- Steel grade and calculated weight of the product.