Sample interview questions: Can you explain your knowledge of different types of expansion joints used in hydronic systems and their applications?
Sample answer:
1. Corrugated Expansion Joints:
- Constructed from flexible metal, rubber, or fabric.
- Designed to absorb thermal expansion and contraction.
- Commonly used in hydronic systems to prevent stress and damage to piping.
- Available in various sizes, shapes, and materials to suit specific applications.
2. Packless Expansion Joints:
- Also known as metal bellows expansion joints.
- Consists of a series of metal bellows connected by a flexible joint.
- Suitable for demanding applications involving high temperatures, pressure, and vibration.
- Offers exceptional flexibility and durability.
3. Guided Expansion Joints:
- Similar to corrugated expansion joints, but with the addition of a guiding mechanism.
- The guiding system ensures controlled movement and prevents lateral displacement.
- Ideal for applications where precise alignment is critical.
4. Spherical Expansion Joints:
- Designed to accommodate angular and lateral movements.
- Offers multi-directional flexibility.
- Commonly used in piping systems where misalignment or vibration is a concern.
5. Flexible Hose Expansion Joints: