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Large-Diameter Flange

Large-diameter flanges designed for energy, petrochemical and water transmission projects under high pressure. Our wide machining capacity ensures perfect flatness and sealing precision even on large workpieces.

Flange TypesFlat · Weld-Neck (WNRF) · Blind · Lapped
DiameterØ600 mm – Ø3000 mm and beyond
Pressure ClassPN6 – PN400 / ANSI Class 150 – 2500
SurfacePhonographic finish (sealing) · Ra 3.2 – 6.3 µm
Material StandardsP245GH · P285NH · ASTM A105 · 304L/316L Stainless
Bolt-Hole Tolerance± 0.1 mm – 0.5 mm (CNC drilling)
Quality ControlUltrasonic test · Dimensional reporting · Hydrostatic conformity