Safety clamps are frequently used in industry to connect multiple elements. Here, we explain the functions and differences.
Table of Contents
What Is a Safety Clamp?
A safety clamp is a fastening element that ensures the stability and security of connections. It firmly connects two or more elements with each other or provides additional security for an existing connection. It is designed to withstand high loads.
What Are Safety Clamps Used For?
The main applications of safety clamps include:
- Gas Installations: They secure screw connections on gas meters, pressure regulators, and other fittings to prevent leaks and unauthorized tampering.
- Piping Systems: In complex piping systems, especially those under pressure or subject to axial thrust forces (e.g., in LORO-X systems), safety clamps prevent the pipes from sliding apart.
- Hose Connections: For high-pressure hoses, safety clamps ensure a firm and twist-proof coupling.
- Construction and Infrastructure: In construction site security, safety clamps are used to stably connect construction fences. This not only increases the stability of the barrier but can also make theft or unauthorized removal of the fences more difficult, as some clamps can only be opened with special tools.
- Mobile Heating Systems: They play an important role in securing hose connections in mobile heating and cooling systems to ensure safe and efficient operation.
The purpose of safety clamps is to increase operational safety and prevent damage or hazards that could arise from loose or tampered connections.
How Does a Safety Clamp Work?
The function of a safety clamp is based on a firm and permanent connection through mechanical pressure or locking. Safety clamps enclose the components to be secured, such as pipes, hoses, or screw connections, and are fixed in such a way that they develop a high holding force. This can be achieved through the following mechanisms:
Screw Mechanisms
Many safety clamps consist of two or more parts that are placed around the connection and then tightened with screws. Tightening the screws creates a clamping force that securely holds the components together and prevents slipping or loosening.
Locking Systems
Some safety clamps feature integrated locking mechanisms that allow for quick yet secure attachment and release. These systems can often only be operated with special tools, which provides additional protection against unauthorized access. This is the case, for example, with safety clamps for construction fences.
Form-Fit and Friction-Grip (Positive and Non-Positive Locking)
Safety clamps establish both a form-fit (precise enclosure of the components) and a friction-grip (friction through contact pressure). In the case of Storz couplings, for example, laterally attached tabs prevent the coupling from twisting by engaging in corresponding recesses in a form-fitting manner.
The functionalities of safety clamps are designed to create a connection that remains stable even under extreme conditions such as vibrations, pressure fluctuations, or mechanical stress, and maintains the integrity of the system.
Why Are Safety Clamps Needed in Connection with Mobile Heating Systems?
Mobile heating systems are temporary solutions for supplying heat to buildings, construction sites, or in the event of a failure of fixed heating systems. These systems must be flexibly connected to existing heating circuits, which requires the use of robust hose connections. This is where safety clamps play a crucial role.
The clamps are necessary in connection with mobile heating systems for the following reasons:
High Pressure
The clamps provide additional fixation for the hoses at the couplings and prevent them from sliding apart under pressure.
Prevention of Leaks
Leaks in heating circuits can lead to considerable damage and loss of efficiency. The clamps ensure that the hose connections remain firm and tight even with vibrations or sudden pressure fluctuations.
Operational Safety
A loose hose connection under pressure can be dangerous and lead to injuries and property damage. The additional securing of the hose connections with the clamps increases the general operational safety of mobile heating systems.
Protection Against Tampering
In some cases, the clamps can make unauthorized tampering with the hose connections more difficult, especially if they have special locking mechanisms.
The clamps are therefore a critical component for ensuring the reliability and safety of mobile heating solutions and enabling smooth operation under changing conditions.
What Are the Different Types and Sizes of Safety Clamps?
The variety of clamps is large and reflects the wide range of their applications. They differ in material, design, size, and the specific locking mechanism. Here are some common types and examples of sizes:
Safety Clamps for Gas Installations
These are often made of stainless steel or galvanized steel and are specifically designed for securing gas meter screw connections and similar fittings. The sizes are based on the nominal widths of the gas lines and the dimensions of the fittings to be secured. An example of sizes that may occur with gas meter screw connections is shown in the following table:
Size | Inner Dimensions A (mm) | Inner Dimensions B (mm) | Pipe Openings C (mm) | Pipe Openings D (mm) |
|---|---|---|---|---|
| G4 | 52 | 22 | 30 | 34 |
| G4-6 | 57 | 22 | 38 | 44 |
| G6-10 | 67 | 23 | 48 | 55 |
| G10-16 | 75 | 25 | 54 | 61 |
| G25 | 92 | 26 | 69 | 76 |
Safety Clamps for Storz Couplings
Designed specifically for fire hoses and other applications with Storz couplings, these clamps prevent the couplings from twisting and unintentionally loosening. They are available for common Storz sizes such as C (DN 52), B (DN 75), and A (DN 110).
Safety Clamps for Construction Fences
These serve to stably connect individual construction fence panels and are often designed so that they can only be opened with special tools to prevent theft. The sizes are adapted to the standard dimensions of construction fence posts.
Hose Clamps with Safety Features
In addition to classic hose clamps, there are also variants with additional safety features that prevent unintentional loosening, for example, through special locking mechanisms or the necessity of special tools for assembly and disassembly. These are available in a wide range of diameters for various hose sizes.
The selection of the correct clamp depends significantly on the specific application, the expected loads, the material requirements (e.g., corrosion resistance), and the safety regulations. It is important to always choose the appropriate clamp for the respective application to ensure safety and functionality.
References:
Viega.de. (seen on 09/22/2025). Sicherheitsschelle.
Loro.de. (seen on 09/22/2025). Sicherungsschellen.
Vigot-schlauch.de (seen on 09/22/2025). Sicherheitsschelle Bronze.