OEM Directly Buried Sleeve Compensator DN65 PN6 Flange Pressure Plate

The sleeve compensator, also known as tubular expansion joint, is a thermal fluid pipeline compensation device designed for axial thermal expansion displacement absorption in straight pipelines. This compensator is suitable for installation in any pipeline transporting non-corrosive unidirectional or multidirectional fluids. Widely used in transmission pipelines across urban heating, metallurgy, mining, power generation, petrochemical, and construction industries. The main components include sleeve (core tube), shell, and sealing materials.

• Extended service life - Fatigue life matches pipeline durability with specially treated sliding surfaces offering superior corrosion resistance (50x better than austenitic stainless steel in saline environments). Sealing performance can be enhanced by tightening flange bolts or adding extra sealing rings.
• Chloride ion tolerance - No restrictions on chloride ion content, making it ideal for systems with chloride-exceeding media or environments.
• Flexible compensation - Available in unidirectional and bidirectional configurations. Bidirectional models allow free sliding from either end for increased compensation capacity.
• Direct burial capability - Can be installed underground without maintenance wells, significantly reducing project costs.

• Crude oil industry
• Chemical industry
• Iron and steel metallurgical industry
• Construction industry
• Underground piping systems
• High corrosive environments
• Long-distance transmission pipelines
• Nuclear power plants
• Paper, pharmaceutical, and textile industries

• Store properly to prevent sun exposure, rain, and sand contamination before installation.
• Verify model specifications match design requirements and inspect for surface defects.
• For standard sizes, no pre-stretching/compression needed unless installation marks indicate adjustment.
• Install bidirectional compensators at midpoint between fixed points for equal compensation.
• Perform hydraulic tests after welding (tighten packing chamber bolts until leak-free).
• Install guide brackets to ensure axial-only movement within ±1° eccentricity tolerance.
• Match pipeline insulation/waterproofing without restricting expansion sections.
• Special cases require consultation.