WELD NECK FLANGE GOST 12821-80
Standard: GOST 12821-80
Material: Carbon steel, Low-alloy steel, Stainless steel.
Nominal Bore (DN): 25 - 1200 mm.
Nominal Pressure (PN): 0.1 - 2.5 MPa.
Temperature Range: -70°C - +300°C.
Working Medium: Hot and cold water, oil, gas, air, sewage products, acids, gases, etc.
A weld neck flange is a critical component of pipeline systems equipped with an additional "skirt" ring, which facilitates its connection to the pipe. After alignment, the joint is fixed and reinforced with a weld, ensuring a reliable and tight seal.
Materials:
- Carbon Steel: Steel 20, 09G2S.
- Stainless Steel: 12X18H10T, 08X18H10T, 13XFA, 10X17H13M2T, 06XH28MDT.
- Other Steels: A105, A181, A182, A350, AISI 304, AISI 304L, AISI 316, AISI 316L, AISI 316Ti, AISI 321, etc.
Flanges are produced with various sealing surface designs:
- Type 1: With a connecting protrusion.
- Type 2: With a raised face.
- Type 3: With a recess.
- Type 4: With a spigot.
- Type 5: With a groove.
- Type 6: For a lens gasket.
- Type 7: For an oval gasket.
- Types 8 and 9: With a spigot and groove for a fluoroplastic gasket.
