Thermal Power Plant Constant Spring Hanger

In the complex steam-water, flue gas-air and pulverized coal pipeline systems of thermal power plants, thermal displacement of pipelines caused by drastic temperature changes is a core hidden danger threatening system safety. Backed by 14 years of technical accumulation in the pipeline support field, Yangzhou Tianshun Pipeline Technology Co., Ltd. has specially developed Thermal Power Plant Constant Spring Hanger for thermal power working conditions. Designed based on the principle of moment equilibrium, this product provides continuous constant supporting force when vertical thermal displacement occurs in pipelines, effectively absorbs and compensates for displacement stress, prevents pipelines and connected equipment from being damaged by additional stress, and ensures long-term safe operation of power plants.

Load‑displacement curve obtained from the type test of a constant spring support/hanger. The horizontal axis stands for displacement while the vertical axis represents load. The curve stays approximately horizontal across the full working travel, demonstrating that the supporting force remains essentially constant when piping deflects due to thermal expansion and contraction.

This type test verifies load constancy, full‑travel stability and operational reliability of constant spring units. All production units are subject to load calibration prior to shipment, with load deviation controlled within ±6% in accordance with ANSI/MSS‑SP‑58‑2018 and NB/T47038‑2013.

These products are applicable to industrial piping systems with large thermal displacement, including main‑steam pipelines and other high‑temperature & high‑pressure piping.

Product Technical Specifications

Constant Spring Hanger Spec Table	Example
Model / Series	PH, LH, CA, CS, TH
Load Capacity (Operating)	0.1 kN - 500 kN
Total Travel	50mm, 100mm, 200mm, 400mm
Actual Travel	Up to 600mm
Load Deviation (Tolerance)	±5% (Standard) / ±3% (High Prec.)
Installation Position	Horizontal / Vertical
Housing Finish	Hot Dip Galvanized / Epoxy
Operating Temp.	-20°C to +80°C (Ambient)
Spring Coil Material	60Si2Mn / 50CrVA
Load Adjustment Range	±10% (Field Adjusting)

Engineering Application and Value Realization

Pipeline systems in thermal power plants have extremely high requirements for the reliability of supporting parts. When designing Thermal Power Plant Constant Spring Hanger, we have fully taken practical engineering pain points into consideration:

Elimination of additional stress: Within the specified load-displacement range, spring moment and load moment always maintain dynamic balance, avoiding pipeline deformation or joint leakage caused by thermal expansion and cold contraction.

Accurate cold-state setting: The manufacturer performs pre-compression setting strictly according to the installation load provided by users, and fixes the indicator plate at the theoretical cold-state working position through positioning blocks, ensuring the spring is temporarily in a rigid state during on-site installation and avoiding accidental stress during construction.

Intuitive operation and maintenance monitoring: The external displacement indicator plate design allows operation and maintenance personnel to intuitively check whether the displacement of the spring support under working load is consistent with the design after the pipeline is put into normal operation, facilitating preventive maintenance.

Strict Quality Control and Installation Specifications

Every Product Is Fully Tested In-House Before Shipment

Before dispatch, each product goes through a complete in-house testing program. This program covers dimensional and visual inspection, PMI (Positive Material Identification), hardness testing, MT/PT non-destructive testing where applicable, spring load testing with load-displacement curves, and coating thickness measurement. Factory Test Reports (FTR) and Material Test Reports (MTR) are supplied with the shipment.

This In-House Testing Is Not ILAC-Accredited Third-Party Testing

If third-party witnessed testing or laboratory testing is required, it can be arranged separately as an optional service.

Optional Third-Party Inspection Services (Quoted Separately)

1. Material Testing

Chemical composition analysis, tensile testing, Charpy low-temperature impact testing, and hardness testing are available.

2. Weld NDT

Magnetic Particle Testing (MT), Liquid Penetrant Testing (PT), Ultrasonic Testing (UT), and Radiographic Testing (RT) can be provided.

3. Spring Load Performance Testing

Load-displacement curves are included.

4. Hot-Dip Galvanizing / Epoxy Coating Corrosion Protection Inspection

5. Witnessed Testing, Factory Surveillance, and Pre-Shipment Inspection (PSI)

What Makes Us Different

Benchmarked Against the LISEGA International Pipe Support System

For load accuracy, testing standards, and documentation systems, we use the LISEGA international pipe support system as our benchmark.

More Than a Standard Domestic Manufacturer

A standard domestic manufacturer typically supplies only the product. We go further by providing a load-displacement curve with every spring unit. We also help arrange third-party SGS testing and witnessed inspections, and we support document reviews by PE/CPE engineers for overseas projects.

Why Choose Tianshun's Thermal Power Plant Constant Spring Hanger?

Rich thermal power project experience: The products are widely used in steam-water pipelines and boiler equipment suspension systems of thermal power plants at home and abroad, and have withstood the tests of multiple unit start-up and shutdown cycles.

Customized engineering support: We provide full-process technical services from pipeline stress calculation, type selection and matching to on-site installation guidance, ensuring that each support accurately matches the working conditions.

Stable supply chain delivery: Relying on automated production lines and complete testing equipment at our Jiangsu base, we ensure on-time and high-quality delivery of materials for large-batch thermal power projects.

Full life cycle support: We establish exclusive project files and provide condition assessment and replacement guidance during shutdown maintenance, reducing the operation and maintenance risks of power plants.

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Yangzhou Tianshun Pipeline Technology Co., Ltd. is committed to providing stable and reliable pipeline support guarantee for global thermal power enterprises with high-standard Thermal Power Plant Constant Spring Hanger!