Safety release valve tags provide an effective method for marking and identifying crucial valve systems.

When pipes start becoming over pressurized, they pose an immense hazard to workers and equipment. One ruptured pipe can cause an entire emergency.

Organizations combat this risk by incorporating safety reliefs into their valve systems. These releases offer a quick and efficient way to limit the amount of pressure and reduce the potential for an accident to occur.

Labeling relief valves with metal safety placards helps distinguish them from other systems as well as readies them for inspection and meets safety regulations.


What is a Safety Relief Valve?

A pressure release valve is a type of safety regulator used to limit the amount of pressure in a system.

Also referred to as a pressure relief, these valves are pre-set to release before a system exceeds its pressure limitations.

The release is done automatically using an internal spring. However, there are also manual relief valves.

Fluid or gas (or a combination of both) is directed out of the system using an opened auxiliary passage. The pressurized substance flows through this pathway as it offers the least resistance.

As the fluid is rerouted, it will typically be led into a combustion area to be burned and released into the open air. This effectively eliminates the excess and quickly serves to reduce the pressure in the system.


If your pipe system does not include a safety relief system, pressure can exceed safe limits, and pose a massive safety risk.

Over pressurized pipes can rupture, leading to leaked gas or fluid. This can cause massive damage to equipment, and put workers at severe risk of injury. Leaked gasses and chemicals can even become a public safety hazard if not sufficiently contained.

Bypass Valves

In addition to relief valves, other valves are used for various types of systems. Bypass valves are sometimes used in lieu of a release valve. These safety regulators work very similarly. However, instead of allowing fluid out of a system, they deliver excess fluid to a reservoir.

This not only acts as a relief to the pipe, but prevents the pump from being over pressurized as well. Fire engines are one of the most prevalent uses for bypass valves.

Safety Regulations

Keeping up with all pertinent safety requirements is vital for every industrial organization. Anything less than up to code leaves the potential risk for equipment malfunctions, workers put in danger, and hefty fines.

Having safety relief valves in place is a great step in the right direction. They provide an effective mechanical means to prevent issues. In order for them to be properly used and maintained, they must also be clearly identified with metal identification tags.

Clear identification ensures they are not tampered with or mixed up with a normal valve.

Other Applications


Another key functionality for safety valve tags is providing information for inspections. Safety regulations require periodic inspections of valves and piping to ensure everything is up to code.

Inspectors can only do their job effectively if they are provide with accurate information which is easily accessible.


Safety release valve tags must be durable enough to hold up in industrial environments. Potential exposure to chemicals, water, and other wear means durability is a key factor in these identification markers.

It is important to select a material and process which matches the durability requirements for your application.

For example, a tag on an outdoor safety valve housing chemicals might need a more durable solution.


Anodized Aluminum

One of the most popular materials used for valve identification tags, anodized aluminum is extremely versatile. It is an incredibly durable substrate, used everywhere from aerospace equipment to manufacturing facilities.


Anodized tags are made to hold up to the rigors of industrial use. They are resistant to wear, weathering, and corrosion.

In addition, the anodization process allows for a solid color to be added to the metal plate. This provides the opportunity to color code various valve types, or just create a more stand-out warning sign.

Stainless Steel

Another commonly used metal in this field, stainless steel sets the bar for durability. The material is incredibly study, and resistant to just about anything it may be exposed to in an industrial-type environment.

Coupled with a durable marking process, these release valve markers will last for many years.

Marking Processes

Photo Anodization

Many organizations turn to photo anodization for marking their safety releases. The process embeds information between layers of anodized aluminum, providing an incredibly resilient ID marker.

The valve tags can be adorned with any information, logo, or barcode. This allows for branding, safety info, and tracking codes to be added to an otherwise basic tag.

In addition, durability is not an issue, with these plates typically having an effective usage of 20+ years.

The anodized material may also include a solid background color for color coding or branding purposes.


If you need your nameplate information to feature color, the etching process is a solid choice. After the design is imprinted using a chemical or laser process, the characters are filled with a color of your choosing.

While this provides a stand-out appearance, keep in mind that etching is not the most durable marking process. The color infill will quickly wear if exposed to tough conditions. While the etched metal itself will last longer, it still is susceptible to wear as the impression is not very deep in the material.


Stamping and embossing are two of the most widely used processes for marking tags. Valves of all varieties are marked with these processes.

Both embossing and stamping press a design directly into the metal substrate. Embossing creates raised information while stamping indents recessed characters.

These deep impressions are incredibly durable, lasting for decades even in the harshest environments.


Safety relief valves are an important element to many industrial pipe systems. By providing an escape route for the fluid, the pressure is able to be rapidly dissipated. This ensures safety of pressurized valves.

Clearly identifying and labeling these safety valves is crucial in ensuring their effectiveness. Metal identification plates provide a durable, long-lasting solution for marking pressure release valves.