Steam Pipe Constant Spring Support

Steam pipelines generate substantial thermal displacement during operation and are highly sensitive to load variation. When the pipeline temperature rises from ambient temperature to operating temperature, vertical displacement ranging from several centimeters to tens of centimeters will occur. If conventional support devices are adopted, the load will fluctuate drastically along with displacement, resulting in pipe stress concentration, damage to equipment connections and even pipe rupture. The Steam Pipe Constant Spring Support is a dedicated support unit developed to solve such problems. It delivers nearly constant supporting force throughout the entire displacement travel, ensuring safe and reliable operation of steam piping systems.

Working Principle & Structural Composition

Designed based on the principle of moment balance, the Steam Pipe Constant Spring Support converts the elastic force of springs into steady supporting force via a linkage mechanism. When the pipeline moves vertically, spring deformation is compensated by the linkage system to maintain a stable output force, with the load variation rate controlled within 5%.

Standard products consist of the following core components:

▶  Spring assembly: Fabricated from high-strength alloy spring steel and subjected to multiple heat treatment processes.

▶  Moment balance mechanism: Precisely machined linkage and cam assembly.

▶  Load adjusting device: Enables accurate on-site adjustment of output load.

▶  Displacement indicator: Clearly displays the actual displacement of pipelines.

▶  Housing & connecting assemblies: Made of premium carbon steel with anti-corrosion surface treatment.

Product Technical Specifications

Core Technical Features

▶  Excellent constant force performance: Load variation rate ≤ 5% across the full stroke, exceeding the requirements of national standards.

▶  Large displacement range: Maximum displacement reaches up to 400mm, perfectly suited for large-diameter high-temperature steam pipelines.

▶  Comprehensive load coverage: A complete series of load ratings from 0.5kN to 500kN are available.

▶  Compact structure: Adopting optimized spatial design, its overall volume is 20% smaller than traditional constant spring supports.

▶  Easy installation: Pre-set to the specified load before delivery, requiring only simple fixing for on-site commissioning.

▶  High safety and reliability: Equipped with overload protection and travel limit devices to prevent accidental damage.

Performance Comparison with Variable Spring Supports

Standard Technical Parameters

Typical Application Scenarios

Steam Pipe Constant Spring Support is mainly applied to steam piping systems featuring large thermal displacement and strict requirements on load stability:

▶  Main steam pipelines and reheat steam pipelines of thermal power plants

▶  Steam piping systems in the conventional island of nuclear power plants

▶  High-temperature steam transmission pipelines in petroleum refineries

▶  Steam power pipelines in iron and steel works

▶  High-temperature hot water and steam trunk lines for urban central heating

▶  Steam heating piping systems in chemical plants

For the above applications, Variable Spring Support for Pipeline can no longer meet operational requirements when pipeline displacement exceeds 100mm or strict control over load variation is required. In such cases, constant spring supports are mandatory to guarantee system safety.

Manufacturing & Quality Control

Yangzhou Tianshun Piping boasts 14 years of professional experience in producing constant spring supports, equipped with complete production facilities and precision testing instruments. We have implemented a rigorous full-set quality control system to ensure all products comply with international standards:

1.Incoming raw material inspection: All steel materials are accompanied by original material certificates, and undergo spectral analysis and mechanical property testing.

2.Precision machining: Key components are processed by CNC machining centers to guarantee high dimensional accuracy.

3.Spring performance test: Every spring passes 100,000-cycle fatigue tests and load calibration.

4.Overall performance test: Each finished unit undergoes full-stroke constant force testing before delivery.

5.Third-party verification: Test reports issued by SGS, BV, TUV and other authoritative third-party organizations are available upon request.

Our quality management system is certified to ISO 9001:2015, and all products conform to international standards including CE and API.

Selection Guidelines & Supporting Services

Piping supports shall be selected according to pipeline displacement and load sensitivity:Choose Variable Spring Support for Pipeline if the vertical pipeline displacement is less than 100mm and the system is not sensitive to load fluctuation.Select Constant Spring Support when the displacement exceeds 100mm or the pipeline has high sensitivity to load variation.

We provide a full range of professional supporting services:

▶  Free piping stress analysis and hanger & support selection calculation

▶  Design and manufacturing of non-standard constant spring supports

▶  On-site installation guidance and commissioning service

▶  12-month warranty, with free repair or replacement for defective products within the warranty period

▶  Long-term spare parts supply and continuous technical support