Spring Supports in Piping Systems

Introduction: The Critical Role of Spring Supports

As a new engineer in Reliability and Asset Management, you'll find that spring supports in processing facilities are more than just hardware; they are vital for the safety and efficiency of piping systems. This guide will help you understand these components, from inspection to addressing common issues and their remedies.

Understanding Spring Supports

Spring supports are designed to bear loads and accommodate movement in piping systems. Regular inspections are essential, yet many facilities lack a formal inspection program. Let's delve into the common issues and their root causes to enhance your practical knowledge.

Common Inspection Findings and Their Causes

During your inspections, you may encounter various issues. Understanding their probable causes is crucial:

1. Improper Load Adjustment: This could be due to incorrect hanger settings or errors in adjacent hangers.

2. Temperature Effects: The system not being at full operating temperature can affect readings.

3. Fabrication and Installation Errors: Pipe fabrication mistakes, improper cold springing, or incorrect hanger installation can lead to issues.

4. Frictional Effects: Guides or sliding supports may cause frictional effects.

5. Design Discrepancies: Differences between design and actual 'as built' conditions can impact hanger loads or movement.

6. Temporary Supports: Failure to remove temporary supports, restraints, or travel stops can cause issues.

Remediating Spring Support Issues

Before initial operation, ensure all spring hanger units are set to the cold position and logged. Upon reaching operating temperature, adjust the load/travel indicator to align with the hot position marking. If minor adjustments don't suffice, consult with a hanger designer.

Addressing Specific Issues

1. Incorrect Installation: Verify installation and load limits in a cold condition.

2. Out of Limits: Adjust the cold load if it's incorrectly set.

3. Unequal Loading: Ensure central loading or adjust as necessary.

4. Verticality Issues: Consider horizontal movement; offset in cold condition for correction during operation.

5. Oblique Loading: Check for excessive horizontal movement or threaded device issues.

6. Support Offset: Install the support correctly and use a sliding plate.

7. Coating Failures: Replace rusted coils and apply additional paint protection.

8. Coil Out of Plane: Address similar to verticality issues; cold spring pipe to correct.

Conclusion: The Importance of a Spring Support Inspection Program

Every processing facility should have an active spring support inspection program. This program should document the type and quantity of all supports and remain vigilant in identifying and remedying abnormalities. As a new engineer in this field, understanding and actively participating in these inspection processes is vital. It's not just about maintaining equipment; it's about ensuring the reliability and safety of the entire piping system. Remember, your proactive approach and diligence can significantly enhance the operational reliability of the facilities you manage.

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