Power Plant Spring Supports

Based on 14 years of experience in pipeline supports/hangers and power plant supporting solutions, Yangzhou Tianshun Pipeline Technology Co., Ltd. provides Power Plant Spring Supports for thermal power, nuclear power and combined cycle power plants. These products are engineered to control thermal displacement and stress distribution in high-temperature, high-pressure pipelines, protecting critical interfaces of main equipment such as boilers and steam turbines. The following details cover product features, engineering advantages and specific application locations.

Product Features

Power Plant Spring Supports are custom-engineered based on pipeline stress analysis results, with core characteristics focused on load retention, displacement adaptability and long-term operational stability.

Load-Displacement Mechanism: Available in two configurations: variable spring hangers/supports and constant force spring hangers/supports. Variable spring units carry load with linear stiffness, while constant force units deliver nearly constant supporting force throughout the entire working stroke, with deviation controlled within 5%, eliminating additional stress in pipelines caused by fluctuating support forces.

Material & Temperature Compatibility: Spring elements are manufactured from alloy spring steels including 60Si2Mn and 50CrVA. Structural components can be fabricated from carbon steel, heat-resistant alloy steel or stainless steel. The overall allowable operating temperature range covers -196°C to +650°C, matching all pipeline requirements from low-temperature feedwater to high-temperature main steam.

Installation & Commissioning Design: Each support/hanger is equipped with an installation locking pin and load-displacement nameplate. Simply remove the locking pin after cold-state installation to activate operation. Nameplate data facilitates on-site verification of model numbers and preset loads, significantly reducing commissioning time.

Comprehensive In-House Testing: All tests including spring stiffness, compression deflection and surface coating thickness are conducted in our own laboratory to ensure consistent performance across production batches. Every unit undergoes three full-stroke compression cycles with stiffness curve recording prior to shipment.

With these design features, Power Plant Spring Supports maintain the predetermined elevation of piping systems under combined conditions of linear thermal expansion and continuous vibration, reducing the probability of unplanned shutdowns.

Engineering Advantages

In power plant pipeline design, compared to purely rigid supports or pipe clamp fixation, elastic support solutions deliver direct improvements in stress control, equipment protection and installation adaptability. The engineering value of Power Plant Spring Supports is reflected in the following aspects:

Effective Thermal Displacement Compensation: Rigid supports cannot absorb pipeline thermal expansion, often leading to pipe system binding, support lifting off or overloading. Elastic hangers/supports carry load linearly or constantly as the pipeline displaces, keeping stress levels within allowable limits specified by codes such as ASME B31.1.

Reduced Thrust & Moment at Main Equipment Interfaces: Boiler headers and turbine steam inlets are extremely sensitive to forces and moments. After adjustment with spring hangers/supports, interface thrust is significantly reduced, preventing weld cracks and flange leaks. This is a critical measure for extending the maintenance intervals of turbine casings, main steam valves and other equipment.

Vibration Transmission Suppression: Power plant pipelines are prone to vibration under high-velocity steam or two-phase flow conditions. Spring support systems adjust support stiffness to an optimal range through elastic elements, and when combined with dampers, effectively dissipate vibration energy to prevent structural fatigue.

Generous On-Site Installation Tolerance: Spring hangers/supports allow fine adjustment within a certain height range, compensating for deviations in civil foundations and cold-state pipeline installation. Constant force spring units are often equipped with hydraulic or screw auxiliary adjustment devices for precise on-site alignment.

Long-Term Operation & Anti-Relaxation: Featuring anti-relaxation spring design and corrosion-resistant surface treatments (hot-dip galvanizing, Dacromet, etc.), support force degradation is minimal. Over 70% of our follow-up orders from overseas projects come from repeat customers, which to some extent reflects the long-term reliability of our support products.

Product Applications

Power Plant Spring Supports are primarily installed at critical positions in power plant steam-water circulation and high-temperature flue gas systems. Combined with dampers, rigid struts and other components, they form a complete pipeline flexible restraint system.

Boiler Area: Used on main steam pipelines, hot and cold reheat pipelines, superheater outlet ducts, etc. Absorbs vertical and horizontal thermal displacement of the boiler body and connecting pipelines, prevents excessive stress at header nozzle connections and reduces the risk of weld cracking.

Turbine Area: Installed on main steam pipes, high-temperature reheat steam pipes and high-pressure bypass pipelines. Through precise support, limits the forces and moments transmitted to turbine interfaces, ensures shaft alignment accuracy and reduces the impact of vibration on turbine casings.

High-Pressure Feedwater System: On high-pressure feedwater pipelines and attemperation water pipelines, spring hangers/supports support heavy-duty pipelines while adapting to temperature changes, maintain pipeline slope and avoid cavitation or water hammer problems caused by restricted displacement.

Flue Gas & Desulfurization/Denitrification System: For large-diameter flue gas/air ducts, GGH inlet/outlet ducts and desulfurization tower connection ducts. These thin-walled structures experience significant thermal expansion. Spring supports compensate for this displacement, reduce flange connection stress and work in conjunction with expansion joints to protect the entire flue gas system.

Nuclear Power Conventional Island: Used on secondary circuit main steam, main feedwater and other pipelines. Meets nuclear power consistency control requirements and provides complete material quality certificates and support function qualification reports.

Quality Assurance & Factory Capabilities

Our factory in Jiangsu Province is equipped with fully automatic bellows production lines, CNC cutting and welding systems, and a certified non-destructive testing (NDT) team. From raw spring wire incoming to finished product delivery, Power Plant Spring Supports undergo strict control at the following checkpoints: verification of raw material heat numbers and physical/chemical reports, hardness and metallographic inspection after spring heat treatment, full-stroke stiffness testing of finished products, and surface coating thickness and adhesion testing.

Our quality management system is certified to ISO 9001:2015, and all products comply with international standards including ASME, CE and API. Complete acceptance documentation can be provided according to project requirements.

Engineering Support & Services

Drawing on our experience supplying pipeline equipment to over 45 countries worldwide, we provide comprehensive selection, installation and long-term technical support for every batch of Power Plant Spring Supports:

▶  Selection Calculation: Receive pipeline stress analysis reports and recommend appropriate support/hanger types, spring constants and installation heights.

▶  Rapid Response: Pre-sales technical inquiries and quotations are replied within one working day.

▶  On-Site Supervision & Witnessing: Support customer or third-party on-site witnessing of testing processes.

▶  Installation & Commissioning Guidance: Provide detailed installation manuals and cold-state adjustment recommendations, with remote video assistance available when necessary.

▶  Spare Parts Service: Retain spring calibration records for every production batch, enabling rapid supply of replacement spring assemblies.

For discussions on Power Plant Spring Support configuration solutions for specific projects or to obtain relevant project references, please contact our technical sales team. We will provide detailed load-displacement calculation sheets and recommended layouts based on actual working conditions, rather than just a list of standard models, helping you control overall procurement costs while ensuring safe pipeline operation.