Ductile Iron Double Flange Dismantling Joint with Tie Rods

In pipeline systems requiring frequent maintenance, component replacement, or controlled expansion, the need for a reliable and robust connection solution is paramount. Our DI Double Flange Power Transmission Dismantling Joint is engineered precisely for these demanding applications. This specialized fitting acts as a versatile spool piece, facilitating the disassembly of pipeline sections without extensive system shutdowns or complex cutting. It is the ideal choice for connecting pumps, valves, and other critical equipment. Similarly, our standard Double Flange Dismantling Joint offers exceptional serviceability for general pipeline maintenance across various industries, including water supply, HVAC, and industrial processing. For applications demanding superior force management and alignment, the Double Flanged Loose Sleeve Force Transfer Joint provides enhanced stability, effectively absorbing axial forces and preventing misalignment, thereby protecting pumps and fixed anchors from excessive stress.


The Ductile Iron Double Flange Dismantling Joint with Tie Rods stands as a premium solution within this category, specifically designed to handle higher pressure ratings and provide superior structural integrity. Constructed from high-grade ductile iron (GGG-40/50), it offers an excellent strength-to-weight ratio and outstanding impact resistance compared to standard cast iron. The inclusion of integral tie rods is a critical feature, ensuring the joint remains securely locked during pressure surges or pipeline movement, preventing accidental separation and safeguarding the entire system. Its design incorporates a precision-machined inner sleeve and high-quality EPDM or NBR seals, guaranteeing a leak-proof connection even under continuous operational stress. This joint is typically supplied with a protective epoxy coating, providing excellent corrosion resistance for both buried and above-ground installations, making it a durable and long-lasting asset for any critical infrastructure project.

Key Features & Specifications

  • Material: Body and Flanges: Ductile Iron GGG-40/50; Tie Rods: Carbon Steel
  • Design Standard: Compliant with EN 1092-2, BS EN 545, AWWA C110/A21.10
  • Pressure Rating: PN10/16, Class 150/250 (Higher ratings available upon request)
  • Sealing System: EPDM (Standard) or NBR seals for hydrocarbon media; Optional Viton available
  • Corrosion Protection: Standard Fusion-Bonded Epoxy (FBE) coating; Other coatings like PU or zinc-rich epoxy can be specified.
  • Installation: Allows for axial displacement and limited angular deflection, simplifying alignment during assembly.
  • Primary Function: Facilitates easy disassembly for maintenance, absorbs pipeline movement, and protects connected equipment.

Standard Dimensions & Technical Data

Nominal Diameter (DN) Flange Diameter (mm) Bolt Circle (mm) Number of Bolts Bolt Size Approx. Length L (mm) Approx. Weight (kg)
80 200 160 8 M16 260 18
100 220 180 8 M16 280 24
150 285 240 8 M20 320 42
200 340 295 8 M20 360 65
250 395 350 12 M20 400 95
300 445 400 12 M20 440 130
400 565 515 16 M24 520 220
500 670 620 20 M24 600 340

Note: Dimensions and weights are approximate and for reference. Specific project requirements may lead to variations. Please consult our technical datasheets or contact our engineering team for precise specifications and custom solutions.

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