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The Ultimate Solution for Easy Valve Maintenance: B-NAI Double Flanged Dismantling Joints

2026-04-29

Closing the Gap in Pipeline Engineering

In a perfect world, pipes would align perfectly with every valve and pump. In reality, on-site measurements often vary, and rigid systems leave no room for error. This is where the Dismantling Joint becomes indispensable. It acts as a telescopic bridge, closing the gap between flanges and providing the necessary clearance to slide equipment in and out of the line.

1. Telescopic Adjustment: The 50mm Advantage

The core design of a B-NAI dismantling joint allows for significant longitudinal adjustment (typically up to 50mm or more depending on size).

Stress-Free Installation: By adjusting the tie rods, the joint can be compressed to provide space for a valve gasket or extended to meet the mating flange. This prevents damaging the pipe or valve flanges during bolting.

2. Full-Length Tie Rods for Load Transfer

Unlike simple expansion joints, our dismantling joints are equipped with full-length tie rods (studs) that span the entire assembly.

Stability: These rods play a dual role: they facilitate the telescopic adjustment during installation and act as a rigid bridge once tightened, transferring the pressure thrust through the joint and ensuring the assembly remains stable under high-pressure surges.

3. Robust Sealing and Corrosion Protection

B-NAI dismantling joints are built for decades of service:

Superior Sealing: We use high-grade EPDM or NBR trapezoidal gaskets that provide a reliable seal even after repeated adjustments.

Industrial Coating: Each unit is sandblasted and coated with heavy-duty fusion-bonded epoxy (min. 250 microns), resisting corrosion in buried or submerged environments.

B-NAI VSSJAFC Double Flanged Steel Dismantling Joint with full-length tie rods for high-pressure valve maintenance.

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