ISO 15848-1 Explained: How PFA Lined Plug Valves Help Reduce Industrial Emissions

Gas facilities are committed to putting safety and environmental stewardship first in their operations. Due to the inherent risks associated with natural gas and other gases that can result from leaks, it is imperative for gas facilities to minimize fugitive emissions (i.e., gas that escapes through valves, pipe, or other equipment).

Even small leaks can yield major incidents. Using best practices for controlling fugitive emissions is essential to ensuring the safety of the operation.

Gas operations implement standards and regulatory guidelines to manage leaks. The most significant of these standards is ISO 15848 – 1. This standard establishes the guidelines and methodology for testing valves and ensuring that a valve will not leak.

If a valve has been tested in accordance with ISO 15848 – 1 Class B, this indicates that the valve produces very low levels of leakage; therefore, it can be utilized safely for many different applications within the industrial sector.

What Are Fugitive Emissions?

Fugitive emissions are small leaks of gas that escape from industrial equipment. These leaks are not easy to see. They can happen in places like valves, flanges, seals, and fittings. Even though they are small, fugitive emissions can cause serious problems.

In a gas facility, fugitive emissions can:

• Pollute the air and harm the environment
• Harm workers’ health by exposing them to toxic gases
• Increase the risk of fire or explosion
• Cause equipment damage over time

Fugitive emissions are dangerous because they can keep happening without being noticed. A tiny leak may not be noticed for weeks or months. Over time, the leak can grow bigger. That is why companies must use strong valves and follow strict testing standards. A valve that is not properly sealed can let gas escape slowly. Over time, this can create a serious safety issue.

Gas facilities use many valves to control the flow of gas. Each valve is a possible point of leakage. That is why they must choose the right valve type and make sure it meets strict standards. ISO 15848 is one of the standards that helps ensure valves do not leak.

Why ISO 15848-1 Is Important

ISO 15848-1 is an international standard used in gas facilities, oil refineries, and chemical plants. This standard tells companies how to test valves to make sure they do not leak. It sets rules for how valves should be built, tested, and classified.

The standard defines different classes of leakage. These classes show how much gas is allowed to leak from a valve. Class B is one of the common classes. It means the valve has a very low leakage rate and is suitable for many industrial uses.

The reason ISO 15848-1 is important is that it helps gas facilities stay safe and meet regulations. If a gas facility has a valve that leaks, it may face fines, shutdowns, or even accidents. A gas leak can cause a fire or explosion, which can lead to major damage. The standard helps ensure valves are reliable and safe.

How Valve Leakage Is Tested

To make sure a valve meets ISO 15848, engineers perform different tests. These tests check how much gas leaks from the valve under certain conditions. The goal is to ensure the valve meets the required leakage class.

1. Pressure Testing

The valve is filled with gas at a certain pressure. Engineers watch for any signs of leakage. This test helps find leaks that may happen when the valve is under normal working pressure.

2. Helium Testing

Helium testing uses a small amount of helium gas due to its extremely low molecular weight, which allows it to penetrate microscopic sealing defects. Detection of helium outside the valve confirms leakage. This highly sensitive method is capable of identifying even trace-level leaks, making it an effective technique for evaluating valve tightness and emission performance.

3. Leak Rate Measurement

Leak rate measurement evaluates the amount of gas released over a defined period. To comply with ISO 15848-1 Class B, a valve must demonstrate extremely low leakage rates within specified limits. Valves meeting these requirements are commonly classified as low-emission valves.

The testing process follows standardized procedures under controlled conditions to verify sealing integrity. This ensures the valve minimizes fugitive emissions and prevents harmful gas release, which is critical in gas facilities where operational safety and environmental protection are top priorities.

Why PFA-Lined Plug Valves Are Used for Emission Control

A PFA Lined Plug Valve is a type of valve that features a PFA (perfluoroalkoxy) lining. This advanced fluoropolymer provides excellent resistance to aggressive chemicals and gases while also reducing internal friction, making operation smoother and more reliable.

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1. Strong Chemical Resistance

The PFA lining is highly resistant to corrosive gases commonly found in gas facilities. Standard metal valves may degrade over time when exposed to harsh media, but PFA-lined valves maintain their integrity, helping ensure long-term performance in demanding environments.

2. Tight Sealing for Zero-Leakage

The lining enables a tight sealing interface, which is essential for meeting ISO 15848-1 Class B requirements. Effective sealing minimizes fugitive emissions, improving safety and supporting cleaner operations. A well-sealed valve plays a critical role in maintaining facility compliance.

3. Long-Lasting Performance

These lined plug valves are designed for durability in harsh service conditions, reducing maintenance frequency and replacement costs. In gas facilities where downtime is expensive, reliable valve performance helps keep operations running continuously.

4. Smooth Operation

The low-friction surface of the PFA lining allows smooth plug movement. This reduces mechanical wear and contributes to consistent sealing performance over time, further lowering the risk of leakage.

Because of these advantages, the PFA Lined Plug Valve is widely selected for emission control applications in gas facilities. It supports zero-leakage goals, enhances safety, and minimizes environmental impact.

Conclusion

Controlling fugitive emissions is essential in gas facilities, as even small leaks can lead to serious safety and environmental concerns. This is why standards such as ISO 15848-1 are used to evaluate valve leakage performance.

When a valve meets ISO 15848-1 Class B, it demonstrates low emission levels suitable for many industrial applications. The PFA Lined Plug Valve helps achieve this through its chemical-resistant lining and reliable sealing design.

By selecting this type of valve, gas facilities can meet zero-leakage requirements, reduce fugitive emissions, and better protect both workers and the environment. Proper valve selection and testing are not merely technical steps—they are fundamental to safer and cleaner industrial operations.