Direct-buried corrugated pipe compensator, also known as the buried type compensator, is primarily used for axial compensation of directly buried pipelines. It features bending resistance, thus the impact of pipeline settling is not taken into consideration.

When in use, it is important to note that the buried bellows compensator requires only one bellows compensator to be installed between the two fixed supports. The calculation of the force exerted by the compensator on the supports is the same as that for a single bellows compensator. This is due to the characteristics of the buried bellows compensator, such as achieving compensation on the pipeline and simple installation.

Its bellows are made of 1Cr18Ni9Ti stainless steel, suitable for installation on pipes operating at temperatures below 350℃ and pressures between 0.25~25MPa, with nominal diameters of DN100~600mm. However, the most commonly used are pipe projects with PN levels of 0.2, 0.5, and 1.0MPa, and pipe diameters of DN50~500mm.

To reduce the flow resistance of the medium, minimize erosion under high-speed flow, or to avoid resonance caused by undulations, a compensator with an inner sleeve should be used when the nominal diameter DN is ≥150mm, and the gas (air) velocity v is 8m/s or the liquid velocity v is ≥3m/s.

The corrugated pipe compensator products are customizable according to customer requirements.