Steam directly buried compensator is a special equipment specially designed for steam pipeline system to absorb the thermal expansion and cold contraction of pipeline caused by steam temperature change. Such compensators are usually buried underground and need to withstand the pressure of the soil, the corrosive environment, and the high temperature and pressure of steam. Here are some key points about steam directly buried compensators:
Type
Ripple compensator: This is one of the most common types of steam directly buried compensators, which absorbs the axial displacement of the pipe by the expansion and contraction of the bellows. The corrugated pipe is usually made of 316L stainless steel with high temperature resistance and corrosion resistance to ensure long-term stable operation in steam environment.
sleeve compensator: Axial compensation is realized by the relative sliding of the inner and outer sleeves, which is suitable for the working conditions of large compensation amount and higher pressure.
Rotary compensator: Using the characteristics of rotating joints, it can not only compensate for axial displacements, but also cope with lateral and angular displacements, which is suitable for complex pipe layouts.
Working Principle
The steam directly buried compensator absorbs the thermal expansion and contraction of the pipe due to temperature change through the telescopic motion of the internal bellows or sliding assembly, thus avoiding the damage of the pipe system due to thermal stress.
Materials and Properties
Materials: Bellows are usually made of 316L stainless steel, which has good corrosion resistance and high temperature resistance.
Sealing material: Using high strength, low friction coefficient flexible graphite ring and other materials, with good sealing effect and easy maintenance characteristics.
Installation & Maintenance
Pre-stretching/pre-compression: Depending on the ambient and media temperature, it may be necessary to pre-stretch or pre-compress the compensator at the time of installation to reserve sufficient compensation space.
Guidance and Fixation: When installing, ensure that there are proper guiding and fixing brackets to control the axial displacement of the pipe and avoid lateral forces acting on the compensator.
Thermal insulation and corrosion protection: The compensator and its surrounding pipelines shall be insulated, and measures shall be taken to prevent corrosion and prolong the service life.
Safety and Specifications
Design and selection: The appropriate compensator must be selected based on the specific parameters of the pipeline system, including operating temperature, pressure, and expected displacement.
Compliance: When designing, installing and maintaining directly buried steam compensator, the relevant industry standards and specifications shall be strictly observed to ensure safe operation.
Steam directly buried compensator plays a vital role in steam pipeline system in electric power, chemical industry, petroleum, central heating and other industrial fields. Their reliability and performance directly affect the safety and efficiency of the whole system.