1. Structure and Materials

Core Components:

Main Body: Cast steel (QT450) or carbon steel (Q235B) for high structural strength, with an inner diameter matching DN1200 (pipe outer diameter 1220mm).

Gland: Carbon steel or stainless steel (304) flange-type gland, designed to compress the seal and transfer axial force.

Sealing Ring: EPDM (for water, steam) or NBR (for oil-based media) rubber ring, ensuring tightness under high pressure.

Fasteners: High-strength bolts (8.8 级) and nuts, galvanized for corrosion resistance, ensuring uniform clamping force.

Detachable Design: The joint can be disassembled by removing bolts, allowing easy maintenance or replacement of seals without cutting the pipeline—saving 50% of maintenance time compared to non-detachable types.

2. Technical Parameters

Nominal Diameter: DN1200 (1200mm), 适配管道外径 1220mm (matching pipe OD 1220mm).

Working Pressure: 1.0MPa~2.5MPa (customizable for 4.0MPa high-pressure systems with reinforced cast steel).

Temperature Range: -20℃~120℃ (EPDM seal); -30℃~80℃ (NBR seal).

Force Transfer Capacity: Can transmit axial thrust up to 2000kN (equivalent to 200 tons), protecting pumps, valves, and other equipment from pipeline pressure impact.

Allowable Displacement:

Axial adjustment: ±30mm (compensation for installation errors);

Lateral offset: ≤15mm (adapting to minor pipeline misalignment).

3. Product Features

Force Transfer Function: Transmits pipeline pressure thrust to fixed supports via the gland and bolts, avoiding excessive load on connected equipment (e.g., water pumps, shut-off valves).

Detachable Advantage: Enables on-site disassembly for seal replacement or pipeline inspection, eliminating the need for cutting/welding—ideal for large-diameter pipeline systems (DN800+).

High Sealing Performance: The rubber ring is compressed by the gland to form a radial seal, with leakage rate ≤1×10⁻⁵Pa·m³/s, meeting municipal water supply and industrial pipeline standards.

Corrosion Resistance: Optional hot-dip galvanizing on outer surfaces (zinc layer thickness ≥85μm) for outdoor or humid environments (e.g., coastal areas, sewage plants).

4. Application Scenarios

Large-Diameter Water Pipelines:

Municipal water supply/drainage (connecting water pumps and main pipelines);

Irrigation projects (transferring axial force to concrete supports).

Industrial Pipelines:

Chemical industry (medium-pressure raw material transportation, compatible with non-corrosive media);

Power plants (circulating water pipelines between boilers and cooling towers).

Infrastructure:

Sewage treatment plants (connecting large-diameter sludge pipelines);

Water conservancy projects (transverse culverts and pressure pipelines).

5. Installation and Maintenance

Installation Requirements:

Ensure coaxial alignment of the joint with connected pipelines (misalignment ≤5mm) to avoid uneven force on the gland.

Tighten bolts symmetrically (torque 350~400N·m for M20 bolts) to prevent local over-compression of the seal.

For high-pressure systems (≥2.5MPa), install auxiliary supports 1.5m away from the joint to bear radial loads.

Maintenance Tips:

Inspect bolts quarterly for looseness (re-tighten if torque drops by ≥10%).

Replace the seal every 3~5 years (or immediately if leakage is detected) to maintain tightness.

Clean the inner surface regularly to remove sediment (prevents uneven wear on the seal).

6. Compliance Standards

China: GB/T 12465-2007 Steel Pipe Fittings for Pressure Piping

International: ASME B16.34 Valves—Flanged, Threaded, and Welding End

Note: For corrosive media (e.g., seawater, dilute acids), customize with 316L stainless steel body and FKM (fluororubber) seals to extend service life to 10+ years.