Proper pipe support design is essential for safe piping system operation. Supports control pipe movement, carry weight, manage thermal expansion forces, and protect connected equipment from excessive nozzle loads. The three fundamental types – fixed, guided, and free – form the basis of all piping support systems.
CoreMetal Steel supplies steel pipe and structural materials engineered for reliable support integration across all industrial piping applications.
Functions of Pipe Supports
- Weight support: Carry pipe, contents, insulation, and accumulated fluids
- Movement control: Direct thermal expansion in desired paths
- Load management: Transfer loads safely to building structure
- Vibration control: Dampen mechanical vibration from pumps and compressors
- Equipment protection: Limit nozzle loads within manufacturer limits
Fixed Supports (Anchors)
Definition
Completely restrain pipe at a specific location, preventing all translational and rotational movement. They divide the piping system into discrete expansion segments.
Types
- Wall anchors: Steel shoes bolted to structural steel in concrete walls
- Foundation anchors: Base plates with anchor bolts on concrete foundations
- U-bolt anchors: Heavy-duty U-bolts for smaller diameter pipes
Design Considerations
Fixed anchors must resist full thermal expansion force plus friction from guided supports. In large-bore, high-temperature piping, anchor forces can exceed 500 kN (50 tonnes). The supporting structure must be verified to carry anchor loads.
Guided Supports
Definition
Allow pipe movement in one direction (axial) while restraining lateral and vertical movement. They ensure thermal expansion occurs in the intended path and prevent buckling.
Types
- Guide brackets: Installed at 1/3 and 2/3 points of expansion loop legs
- Guide shoes: U-shaped shoes with slide plates
- Ring guides: Clamp-on rings riding on structural rails
Spacing
First guide from anchor: maximum 14 pipe diameters. Subsequent guides: typically every 6-12 meters depending on diameter.
Friction Coefficients
- Steel-on-steel (dry): 0.3-0.5
- Steel-on-steel (lubricated): 0.1-0.2
- PTFE-on-steel: 0.05-0.10
Free (Sliding) Supports
Definition
Carry vertical weight while allowing unrestricted horizontal movement. Most common support type in straight pipe runs.
Types
- Roller supports: For large-diameter, heavy pipes requiring low friction
- Slide plate supports: PTFE or polished stainless steel plate
- Spring supports: Variable or constant type for vertical thermal movement
- Hanger rods: Suspend pipe from overhead structure
Maximum Span Guidelines
- Small bore (DN15-DN50): 3-6 meters
- Medium bore (DN100-DN300): 6-12 meters
- Large bore (DN400+): 12-18 meters
Spring Supports
Variable Spring Supports
Support force varies with displacement. Variability should not exceed 25%. General purpose where variable loading is acceptable.
Constant Spring Supports
Essentially constant supporting force throughout full vertical movement. Higher cost, used where variable loading would overload equipment nozzles.
Why Choose CoreMetal Steel
CoreMetal Steel supplies complete range of steel products for piping support systems including carbon steel pipe, steel plate and structural shapes, stainless steel and alloy products, complete material certification, and custom lengths to minimize field fabrication.
Contact CoreMetal Steel today for pipe materials and piping system design support.