Spring Hanger

Spring supports and hangers are critical components in power plant piping systems, designed to manage thermal expansion, reduce stress, and maintain proper alignment of pipelines under varying temperatures and loads. These devices ensure safe and reliable operation of high-temperature and high-pressure piping networks, such as steam lines, boiler feedwater systems, and turbine bypass pipelines.

1. Types of Spring Supports & Hangers

A. Variable Spring Supports (Variable Hangers)

Function: Allow vertical movement while supporting pipe weight.
Mechanism: Stiffness changes with displacement (spring rate varies).
Applications:Steam piping with moderate thermal expansion.

B. Constant Effort Hangers (Constant Support)

Function: Provide constant load support regardless of pipe movement.
Mechanism: Uses a spring-lever or cam mechanism to maintain force.
Applications:High-temperature steam lines (e.g., main steam piping).Nuclear power plant safety-critical piping.

C. Rigid Hangers (with Spring Assist)

Function: Support weight while allowing slight movement.
Mechanism: Combines rigid support with a small spring for flexibility.
Applications:Short pipeline spans with minimal thermal growth.
Auxiliary piping in power plants.

2. Key Design Features

✔ Adjustable Load Setting – Pre-set to match pipe weight and thermal expansion.
✔ Corrosion-Resistant Materials – Stainless steel (SS304/316) or carbon steel with coatings.
✔ Travel Indicators – Visual scale to monitor pipe movement.
✔ Locking Mechanism – Prevents over-extension during installation/maintenance.

3. Typical Applications in Power Plants

Main Steam Lines – Constant support hangers for safe thermal expansion.
Boiler Feedwater Pipes – Variable springs to handle temperature changes.
Turbine Bypass Systems – Shock-absorbing hangers for vibration control.
Condenser & Cooling Lines – Corrosion-resistant springs for wet environments.