Large Diameter Flange Custom & heavy-duty flanges

Name: Large Diameter Flange
Brand: GUANGZHU FLANGE
SKU: LD

Large diameter flanges serve oil and gas trunk lines, water conservancy projects, wind power and marine equipment

Product description

Large diameter flanges serve oil and gas trunk lines, water conservancy projects, wind power and marine equipment. They are produced from solid forgings or rolled-and-welded plate, then machined on CNC vertical lathes and large radial drilling machines to guarantee flatness and bolt-hole position. Custom sizes to customer drawings or ASME B16.47 Series A/B are available.

Key features

26" - 60" to ASME B16.47 Series A / B
Custom DN1500 - DN5000 and non-standard oversize flanges
CNC vertical lathe machining for stable flatness and concentricity
Build-to-print service with material and dimensional inspection reports

LD Class 150 – 900

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Technical specification

Specification and supply scope

Large Diameter Flange
Standards	LD · Produced to ASME / EN / DIN / JIS / BS / GOST standards
Size range	26" - 60" (DN650 - DN1500) standard; DN1500 - DN5000 custom
Pressure rating	Class 150 – 900; PN6 – PN40
Available materials	Q235, Q345, 20#, A105, 16Mn, 304/316L, duplex steel
Face type	RF raised face / FF flat face
Surface treatment	Rust-preventive oil / black paint / hot-dip galvanizing / epoxy coating (optional)
Packing	Fumigated wooden cases or pallets, steel-strapped, with material certificate and packing list inside

Typical applications

Where this product is typically used

Oil & gas trunk linesWater conservancy & large municipal networksWind power & offshore equipmentShipbuilding & port machineryLarge chemical vessels & columns

Applications are indicative only. Final selection depends on design pressure, temperature, media and site conditions - our technical team is glad to advise.