You can download or view the technical data and PDF documentation through the following sources: GOST 12821-80 Flange Specifications | PDF - Scribd
Can withstand extreme environments ranging from -253∘Cnegative 253 raised to the composed with power C +600∘Cpositive 600 raised to the composed with power C Materials: Common steel grades include (low-alloy), and stainless steels like Standard Status and Downloads
While GOST 12821-80 has been officially withdrawn and replaced by newer standards like , it is still frequently referenced in legacy maintenance and specific technical projects.
is a Soviet-era technical standard (ГОСТ) that specifies the design, dimensions, and technical requirements for steel butt-welded (weld-neck) flanges . These flanges are widely used in pipelines, equipment, and fittings for industries like oil and gas, chemical processing, and water supply across Russia and the CIS countries. Key Technical Specifications Pressure Range ( PNcap P cap N ): From Nominal Diameters ( DNcap D cap N ): Typically ranges from depending on the pressure rating.
