In the building construction and design sector, safety is a top priority. In order to guarantee high quality standards and maximum reliability, the most accredited manufacturers rely on certifications issued by independent third-party bodies, which, through rigorous testing and regular inspections, ensure that products placed on the market meet well-defined requirements and are constantly monitored over time. Among the most prestigious and rigorous certifications is the FM (Factory Mutual) certification. In this article, we will take an in-depth look at what it means to use FM-certified polyethylene flanges and fittings, how this certification is obtained and why it is essential in the prevention sector, with a focus on fire protection systems.

What is FM Certification and what does FM Approved mean?

FM certification is issued by FM Approvals, a division of Factory Mutual Global. This body is part of one of the largest American insurance companies, specialising in the protection of commercial and industrial property globally. FM Approvals stands out for its dedication to safety, conducting extensive testing and advanced research with the aim of validating products and systems that meet the highest standards. Their main focus is on risk prevention and, in particular, the fire protection of buildings.

Obtaining FM certification is not a simple bureaucratic process, but rather an articulated process, divided into several stages of evaluation and verification. Products that pass all the required tests obtain official FM Approved recognition, a quality mark recognisable by the “FM” symbol, clearly visible on the product itself or on its packaging. This mark is not only symbolic: it represents a guarantee for builders, designers, architects and insurance companies, who recognise in FM a reference body for safety. So much so that FM-certified products are often requested in tender specifications and major construction projects, not only in the United States, but also in Europe and Italy.

Why Use FM Certified Polyethylene Fittings and Flanges for Fire Fighting Systems?

Fire protection systems are an indispensable element in the design of industrial and commercial buildings, ensuring safety and protection of people and structures. The proper functioning of the system, especially in emergency situations, depends to a large extent on the properties of the material used for the pipework and fittings.

FM-certified polyethylene fittings and flanges are designed to ensure that the water supply is uninterrupted, providing water quickly and safely to the fire-fighting system. In particular, underground pipes and fittings must meet very stringent requirements, as their task is to transport water from the supply source to points of end use, such as sprinklers and hydrants, with maximum reliability.

For this reason, the materials used must guarantee:

• Resistance to high internal pressures, to cope with the high hydraulic stresses that occur during firefighting system activation.
• High mechanical and structural strength, capable of withstanding external loads, ground movements and other environmental stresses without compromising the integrity of the system.
• Resistance to high temperatures, since in the event of fire, exposure to intense heat must not affect the functionality of the pipes.
• Corrosion and chemical resistance, to ensure a long service life, minimising maintenance and reducing running costs.
• Stability and durability, maintaining physical and performance characteristics even after years of operation.