Do you require UL listed or FM approved clamps

When it comes to selecting pipe clamps, hangers, or support systems for fire protection, HVAC, or industrial piping, the question often arises:
Do you need UL Listed or FM Approved clamps?

This is not just a formality — it can determine whether your system complies with safety standards, passes inspection, and performs reliably under pressure. Let’s break down what these certifications mean, when they’re required, and how to choose the right one for your project.

What Does “UL Listed” Mean?

UL (Underwriters Laboratories) is one of the most recognized safety certification organizations in the world.
When a clamp is UL Listed, it means it has been tested and meets UL’s stringent standards for safety, performance, and reliability.

For example, a UL Listed pipe clamp used in fire sprinkler systems must demonstrate:

• Adequate strength to support the piping under load

• Resistance to heat and corrosion

• Compatibility with fire protection components

In short, UL Listing = proven safety through testing and certification.

What Does “FM Approved” Mean?

FM Approvals, a division of FM Global, focuses on property loss prevention.
Products with the FM Approved mark have undergone rigorous performance and quality evaluations to ensure they help reduce risk in critical systems like:

• Fire protection networks

• Industrial water supply systems

• Chemical and process piping

FM places a strong emphasis on durability, reliability, and performance under real-world fire conditions.

UL vs. FM: What’s the Difference?

While both UL and FM are globally respected, there are subtle but important differences:

In many cases, specifiers or local building codes may require either one or both certifications. Some projects — especially those insured by FM Global — specifically mandate FM Approved components.

Do You Need UL or FM Certified Clamps?

Here’s how to decide:

•  Fire Protection Systems (NFPA 13) – UL Listed and/or FM Approved clamps are typically required.

•  FM-Insured Facilities – FM Approved components are mandatory.

•  General Industrial Piping – Certification may not be required, but using certified clamps adds confidence and traceability.

•  Electrical or Mechanical Systems – Check local or project-specific codes; UL Listing is often sufficient.

If your project specification mentions “UL/FM approved”, it means either certification is acceptable — provided the clamp meets the required design and performance criteria.

Why Certification Matters

Choosing certified clamps ensures:

• Compliance with safety standards and insurance requirements

• Consistent product quality and load performance

• Peace of mind during inspections and audits

Uncertified clamps might seem cost-effective, but they can expose your project to non-compliance risks, insurance issues, or even system failure under critical conditions.

Conclusion

When it comes to safety-critical systems like fire protection and industrial piping, UL Listed or FM Approved clamps are not optional — they’re essential.
Understanding the difference helps you make the right choice for your project, ensuring both regulatory compliance and long-term reliability.

If you’re unsure which certification applies to your system, consult your project engineer, local authority, or insurance provider. And when in doubt — always choose certified.

 Need Help Selecting the Right Clamp?

Our engineering team can help you identify UL Listed or FM Approved clamps that meet your system’s specifications.
Get in touch with us for technical datasheets, certification details, or custom support solutions.

For more details on installation and specifications, visit our official product page or contact our technical support team for personalized assistance.