Dismantling joints PN10

1. Core Function: Facilitating Installation and Dismantling

This is its most fundamental and unique purpose. Unlike welded or fixed flange connections, the bolts of a dismantling joint are loosely mounted on the pipe flanges.

During installation: The joint body can first be fixed to one pipe section. The other pipe’s flange holes can then be easily aligned, and bolts can be inserted and tightened without requiring precise initial alignment.

During maintenance: When valves, pumps, or pipeline sections need replacement, simply loosening the joint’s bolts allows the pipes to be axially moved and separated. This avoids the need for extensive cutting or disassembly of the entire pipeline, significantly saving time and labor.

2. Compensating for Pipeline Displacement

Axial displacement compensation: It can absorb axial (along the pipe direction) expansion and contraction caused by thermal changes.

Minor angular deflection compensation: It can tolerate slight misalignment or angular deflection between pipes.

Notiz: It is generally not intended for compensating significant lateral displacement (perpendicular to the pipe direction). Its capability in this regard is less than that of hinged or gimbal-type expansion joints.

3. Sealing Function

The joint contains internal sealing rings (typically made of rubber, such as NBR or EPDM, selectable based on the medium). When bolts are tightened, the rings compress to ensure the pipeline medium (water, oil, gas, etc.) does not leak.

4. Limiting and Anti-Blowout

Many dismantling joints (especially the “limiting type”) feature limit bolts or devices. When the pipeline is subjected to internal pressure and resulting thrust force, these limiters prevent the joint from being over-extended, protecting the seals and preventing pipe separation to ensure system safety.

5. Application Scenarios:

Dismantling joints are widely used in:

Water supply and wastewater treatment systems

HVAC (Heating, Ventilation, and Air Conditioning) systems

Chemical and industrial pipelines

Inlets/outlets of pumps, valves, and water meters (facilitating installation and maintenance of this equipment)

Pipeline sections requiring frequent disassembly and maintenance

6. Main Types:

AF Type: Single-flange loose sleeve limiting expansion joint (one end flanged, one end for welding to the pipe).

BF Type: Double-flange loose sleeve limiting expansion joint (both ends have flanges, the most common type).

B2F Type: Double-flange loose sleeve transfer force joint (can transmit pipeline thrust forces in addition to compensation and disassembly functions, protecting equipment).

7. Technical Sheet

Dimensions In mm