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Pressure-Rated 90° Double Loose Flange

Standard: ISO2531/EN545
Size: DN40—1000
Pressure Rate: PN10/PN16
Internal Lining: FBE(Fushion Bonded Epoxy)
External Coating: FBE(Fushion Bonded Epoxy)
Application:
  • Water Supply, Transmission and Distribution
  • Water Plant and Sewage Treatment Reservoir Piping
  • Sewage Collection and Disposal System
  • Storm Water Drainage System
  • Irrigation System
  • Fire Fighting System
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Double Loose Flange 90° Bend


Understanding the Product


The Double Loose Flange 90° Bend is a high-performance piping fitting designed to enable sharp, right-angle direction changes in flange-connected pipe systems. Its defining features are the 90° bend angle—perfect for navigating corners, walls, or equipment—and the double loose flange connection, which offers unmatched flexibility in installation and maintenance. Engineered to meet the demands of industrial, municipal, and commercial applications, this fitting combines the structural integrity of UPVC with the practicality of loose flanges, ensuring reliable performance in systems where space constraints or frequent maintenance require a compact, accessible fitting.


Core Advantages


Sharp, Efficient Direction Change

The 90° bend angle provides a precise right-angle turn, making it ideal for tight spaces and layouts that require abrupt but smooth direction changes. The optimized internal geometry minimizes flow turbulence and pressure loss.


Easy Alignment and Disassembly

The loose flange design allows for on-site adjustment of the fitting’s position, simplifying alignment with existing pipes. It also enables quick disassembly for cleaning, repairs, or system upgrades, reducing downtime.


High Pressure Resistance

Built to support PN10/PN16 pressure ratings, the fitting withstands the demands of medium to high-pressure piping systems. The flange connection distributes pressure evenly, preventing leaks even under stress.


All-Weather and Chemical Durability

The FBE (Fusion Bonded Epoxy) internal lining and external coating protect against corrosion, UV radiation, and chemical exposure. The UPVC core resists degradation from water, sewage, and industrial chemicals, ensuring long-term reliability.


Typical Uses


Building Plumbing and Riser Systems

Perfect for residential and commercial building plumbing, where the 90° bend routes pipes around walls, floors, and ceilings. The loose flange design simplifies installation in confined spaces like utility closets.


Storm Water and Drainage Lines

Used in storm water drainage systems, the fitting’s right-angle bend efficiently redirects water from horizontal to vertical pipes or vice versa. The leak-tight connection prevents flooding and water damage.


Industrial Process Piping

Ideal for industrial process systems, where the 90° bend navigates around machinery and equipment. The easy disassembly supports regular maintenance of process lines handling chemicals or abrasive fluids.


Water Treatment Plants

Integral to water plant and sewage treatment reservoir piping, the fitting’s corrosion resistance and pressure tolerance make it suitable for transferring treated or untreated water. The loose flange design facilitates system cleaning.


Design Specifications


Adherence to International Standards

Manufactured in compliance with ISO2531/EN545, ensuring compatibility with global flange-connected piping systems. It meets strict requirements for pressure ratings (PN10/PN16), dimensional accuracy, and material quality.


Premium Material and Coating

Constructed from high-grade UPVC for exceptional strength and chemical resistance. The FBE internal lining ensures a smooth flow path, reducing friction and sediment buildup. The external FBE coating shields against environmental damage.


Precision Engineering

The 90° bend is machined to exact tolerances, ensuring a consistent angle and smooth internal surface. The loose flanges feature standardized bolt hole patterns for compatibility with industry-standard gaskets and fasteners. The fitting’s compact design maximizes space efficiency.


FAQ


What is the benefit of a loose flange over a fixed socket connection?

Loose flanges offer flexibility in alignment and easy disassembly, which is critical for maintenance, repairs, or system modifications. Fixed sockets require pipe cutting for adjustments, while loose flanges can be unbolted and repositioned.


Can this fitting be used with corrosive industrial fluids?

Yes, the FBE coating and UPVC material provide strong resistance to most corrosive fluids. However, always check the chemical compatibility of the fluid with the fitting’s materials before use.


Does the 90° bend cause significant pressure loss?

The fitting’s internal geometry is optimized to minimize pressure loss. While sharp bends typically create more turbulence than low-angle bends, this design reduces disruption to maintain efficient flow.


What type of gasket should be used with this flange fitting?

Use gaskets compatible with UPVC and the fluid being transported. Common options include EPDM, nitrile, or PTFE gaskets. Consult the manufacturer for specific gasket recommendations based on your application.


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Add: Donggao Village, Bagong Town, Zezhou County, Jincheng City, Shanxi, China
Phone: +86-15135866651
E-mail: dcipipe@hotmail.com

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Add : Donggao Village, Bagong Town, Zezhou County, Jincheng City, Shanxi, China
Phone : +86-15135866651
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