Choosing a pipe clamp isn't as simple as measuring the pipe and matching a number.

The outside diameter is important, but it's only the starting point.

The right clamp also depends on what you're supporting, the operating conditions, the pipe's weight, vibration, temperature and how the pipe will be mounted.

Get those details right before ordering and you can avoid the frustrating situation of having clamps arrive on site only to discover they're the wrong size or configuration.

Here's the checklist to work through.

1. Measure the Actual Outside Diameter 

Start with the actual outside diameter (OD) of the pipe, tube or hose.

Don't rely solely on the nominal pipe size.

A nominal pipe size doesn't always correspond exactly to the outside diameter, particularly when you're working with different pipe materials and standards.

If you're unsure, measure the OD directly with suitable measuring equipment.

Check: ☐ Actual outside diameter measured

2. Identify What You're Supporting

Is it:

• Pipe?

• Tube?

• Hose?

• Hydraulic line?

• Stainless steel pipe?

• Plastic pipe?

The application matters because different products can have different dimensions, stiffness and support requirements.

Check: ☐ Pipe, tube or hose identified

3. Check Whether the Bore Is Smooth or Grooved

Some clamp systems are designed for smooth pipe and tube, while others accommodate grooved pipe.

Don't assume one clamp configuration will suit both.

Check: ☐ Grooved or smooth bore selected

4. Select the Correct Clamp Series

Pipe clamps are available in different series and configurations.

The correct series depends on factors including pipe diameter, application and required support.

This is where the manufacturer's sizing information becomes important.

Check: ☐ Correct clamp series selected

5. Choose the Right Clamp Body Material

Clamp bodies can be manufactured from different materials depending on the application.

Consider:

• Temperature

• Chemical exposure

• Environment

• Vibration

• Required damping characteristics

For example, an industrial installation exposed to harsh chemicals may have different requirements from a dry indoor workshop.

Check: ☐ Clamp body material suitable

6. Check the Hardware Material

Don't forget the bolts, nuts, washers and mounting hardware.

Hardware needs to be suitable for the environment and compatible with the rest of the installation.

Consider corrosion exposure, moisture and chemical conditions.

Check: ☐ Hardware material suitable

7. Consider Operating Temperature

Temperature affects both the pipe and the clamp material.

Hot pipework can expand and contract as temperatures change, while some clamp materials have specific temperature limits.

Consider both the normal operating temperature and any potential temperature spikes.

Check: ☐ Operating temperature considered

8. Consider Pressure and Pressure Fluctuations

Operating pressure isn't the only consideration.

Pressure fluctuations, pulsation and pressure surges can introduce additional movement and loads into the pipework.

This is particularly relevant around compressors, pumps, valves and hydraulic systems.

Check: ☐ Pressure and pressure fluctuations considered

9. Calculate Pipe Weight

The clamp isn't supporting an empty pipe.

The pipe itself has weight, and that weight increases with diameter and wall thickness.

Long pipe runs also place greater loads on support points.

Check: ☐ Pipe weight considered

10. Include the Weight of the Fluid

A pipe full of air weighs very little compared with one carrying water or another dense fluid.

The fluid inside the pipe therefore needs to be included when calculating the support requirements.

This becomes particularly important for larger water, process and hydraulic lines.

Check: ☐ Fluid weight considered

11. Consider Vibration

Is the pipe connected to a compressor, pump, motor, hydraulic system or other vibrating equipment?

If so, vibration needs to be considered when selecting the clamp and determining support spacing.

A suitable clamp can help control pipe movement and reduce vibration transmission into the surrounding structure.

Check: ☐ Vibration considered

12. Check Clamp Spacing

Installing the right clamp in the wrong location can still create problems.

Pipe support spacing depends on factors such as:

• Pipe diameter

• Pipe material

• Weight

• Operating temperature

• Fluid

• Pressure

• Vibration

Long unsupported sections can allow pipework to sag, move or vibrate.

Check: ☐ Clamp spacing considered

13. Support Bends and Valves Properly

Straight pipe isn't the only part that needs support.

Bends, valves and connections can introduce additional forces into a piping system.

Pay particular attention to areas where equipment connects to the pipework or where direction changes occur.

Check: ☐ Bends and valves supported appropriately

14. Confirm the Mounting Arrangement

Finally, look at how the clamp will actually be mounted.

Will it attach to:

• A steel structure?

• A wall?

• A support rail?

• A mounting bracket?

• A fabricated frame?

The mounting arrangement affects which clamp configuration and hardware you'll need.

Confirm this before ordering rather than trying to work it out when the materials arrive on site.

Check: ☐ Mounting arrangement confirmed

Pipe Clamp Selection Checklist

Before placing your order, run through the complete list:

☐ Actual outside diameter measured
☐ Pipe, tube or hose identified
☐ Grooved or smooth bore selected
☐ Correct clamp series selected
☐ Clamp body material suitable
☐ Hardware material suitable
☐ Operating temperature considered
☐ Pressure and pressure fluctuations considered
☐ Pipe weight considered
☐ Fluid weight considered
☐ Vibration considered
☐ Clamp spacing considered
☐ Bends and valves supported appropriately
☐ Mounting arrangement confirmed

If you've checked every box, you've covered the main factors that can affect pipe clamp selection.

The Right Clamp Is About More Than Diameter

The most common mistake is treating pipe clamp selection as a simple diameter → clamp size exercise.

In reality, the diameter tells you what size you're starting with.

The application tells you what you actually need.

A well-designed support system considers the pipe, the fluid, the environment, the operating conditions and the way the system moves under load.

For industrial pipework, getting those details right helps create a more stable, reliable installation and reduces the risk of having to modify your support system later.

Need help selecting the right pipe clamp?

Air Energy supplies Kova pipe clamps and industrial pipe support components for applications across Australia. We can help you work through the relevant sizing and application requirements before you order.