Stardard:
Gost 12820 for Plate flange, PN6, PN10, PN16, PN25, PN40, PN63.
Gost 12821 for Welding neck flange, PN6, PN10, PN16, PN25, PN40.
Gost 12836 for Blind flange, PN6, PN10, PN16, PN25, PN40.
Material:
Carbon Steel: 20#, Q235B, 16Mn, 20Mn, ASTM A105/A105N, etc.
Stainless Steel: ASTM A182 F304 (1.4306), F304L(1.4307), F316(1.4404), F316L(1.4404), F321(1.4541) etc.
Size: 1/2" to 72" (Dn15 - Dn2000), Forged flange.
Coating: Anti Rust Oil, Black Paint Coating, Yellow Paint Coating, Hot Dipped Galvanized, Cold Galvanized, etc.
Packing: Moistureproof & Seaworthy Packing in Wooded case, or on Pallet.
Quality control:
Visual Check, Mechanical Testing, Hydrostatic Testing, Eddy Current Testing, Chemical Analysis, Corrosion Test etc.