This GB/T9113 Q235B PN16 RF Blind Flange is hot-rolled solid blank flange, the most cost-effective permanent pipe end closure fitting for general low-medium pressure non-corrosive piping systems. Different from through-hole flanges, it adopts integral solid disc structure without central bore, designed to permanently or temporarily block pipeline ends, isolate branch pipes and reserve pipe expansion ports for municipal and factory piping projects. Made of virgin hot rolled Q235B mild carbon steel, no recycled scrap doping, passed full spectral composition test to guarantee uniform internal metal texture, no hidden sand holes or shrinkage cavities inside the solid plate.
Standard 2mm RF raised face sealing design fits universal rubber gasket, asbestos-free composite gasket for stable sealing of normal-temperature water, compressed air and urban ventilation medium. CNC integral drilling for bolt holes with ±0.1mm tolerance, fully matched with GB standard paired flange bolt pitch, quick bolt locking without on-site reaming. Thickened disc bearing design improves pressure resistance, rated PN16 1.6MPa continuous working pressure, anti-deformation under long-term static pipeline pressure. Finished with black anti-rust oil immersion, full surface anti-oxidation protection for indoor warehouse and short-term outdoor exposed installation.
It adopts bolted connection fully instead of welding, easy disassembly for later pipeline reopening and reconstruction. Full quality inspection included flatness test, hydraulic tightness test, appearance deburring. Available size DN15-DN600 full stock for fast delivery. Suitable for building water supply trunk pipe end sealing, factory ventilation pipe blocking, municipal standby branch pipe isolation. Support neutral export packing, bulk order factory discount, 12-month factory warranty, free batch inspection report for European buyers.
Core Spec: Standard: GB/T9113; Pressure: PN16; Face: RF; Material: Q235B Hot Rolled Carbon Steel; Structure: Solid Integral Disc; Size: DN15-DN600
FAQ: Q: Blind flange vs end pipe welding plug?
A: Bolted blind flange is detachable, convenient for later pipeline reuse, more flexible than welded plug.
