Small tie rod transverse expansion joint

Product Introduction

I. Structure and composition

The transverse expansion joint of the small tie rod is composed of two sections of bellows, an intermediate connection pipe and a small tie rod with a limit nut. Its core components include:

1. Bellows: Made of stainless steel (such as 1Cr18Ni9Ti, SUS304 or SUS316L), manufactured by multi-layer one-time hydroforming process, with both corrosion and fatigue resistance;

2. Small tie rod mechanism: It is used to limit the displacement range and balance the internal pressure thrust, and the nut position should be adjusted according to the actual compensation amount after installation;

3. connecting component: Provide flange or welding two connection methods, adapt to the installation requirements of different pipeline systems.

2. Functional characteristics

1. Multidirectional displacement compensation: It can absorb the transverse, axial and angular displacement of pipelines, especially suitable for stress relief of complex curved pipe systems (such as L-shaped and Z-shaped layout);

2. Thermal stress managementCompensate for thermal expansion and cold contraction caused by temperature change through elastic deformation of bellows to prevent pipeline deformation or rupture;

3. Vibration and noise reduction: Reduce the impact of mechanical vibration on the pipeline system and improve the operation stability;

4. Wear resistance and high temperature resistance: Optional wear-resistant guide tube or ceramic coating, suitable for severe working conditions such as pulverized coal and granular media.

III. Technical parameters

• Pressure range: 0.1~2.5MPa, high-pressure customization can reach higher standards;

• Temperature range: -20℃ ~ +400℃, special design can be extended to high temperature environment;

• Path Range: DN50~ DN8000, covering the demand of small to super-large pipelines;

• Compensation amount: The transverse compensation amount can reach 90~537mm, and the axial compensation amount can be flexibly adjusted according to the combination form.

APPLICATION FIELDS

Widely used in:

1. Energy industry: Thermal compensation of pulverized coal pipeline and heating pipe network in thermal power plant;

2. Chemical metallurgyDisplacement absorption of a corrosive medium conveying pipeline;

3. Environmental protection engineering: Vibration control of sewage treatment and water plant pipelines;

4. Cement building materials: Wear protection of powder conveying system.

Product advantages

1. Compact structure: Compared with the large tie rod type, the volume is smaller, which is suitable for installation scenarios with limited space;

2. Cost-efficient: No additional fixed brackets are needed, reducing construction costs;

3. High safety: The tie rod mechanism can balance more than 80% internal pressure thrust and reduce the pipeline load;

4. Long-life design: The fatigue life of bellows reaches more than 1000 times, and the special working conditions can be customized and strengthened.

VI. Installation precautions

1. After installation, it is necessary to loosen the small tie rod nut and reserve the distance from the ear plate (determined by the compensation amount);

2. When the actual compensation amount exceeds the sample value, the small tie rod should be removed to avoid structural damage;

3. The bellows should be fixed during transportation to prevent collision deformation.

This product has passed the certification of GB/T12777 and other standards, and the specific selection needs to be combined with the comprehensive calculation of pipeline medium, pressure and displacement.