PN-EN 682 Standard

The PN-EN 682 is a European standard that defines the requirements for sealing materials used in supply pipes, fittings, auxiliary devices, and valves. These components are designed to operate in working temperatures from -5°C to 50°C (in specific cases from -15°C to 50°C) and are intended for the transport of gaseous and hydrocarbon fluids.

Seals in Supply Lines and Components for Gases and Liquid Hydrocarbons

Sealing systems used in the gas industry are expected to offer long service life and strong resistance to chemical attacks caused by gases of varying compositions.

The EN 682 European standard plays a crucial role in the gas industry. As mentioned above, it outlines the requirements for materials used to seal supply lines and associated components operating within a temperature range of -5°C (or -15°C in specific cases) to 50°C.

Types of Materials According to PN-EN 682

The PN-EN 682 standard classifies sealing materials into two main types:

Type G – General Applications

This type is intended for materials used in gas fuels and liquid hydrocarbons containing up to 30% by volume of aromatic hydrocarbons or liquefied natural gas (LNG) in its liquid phase.

Type H – Special Applications

This type is suitable for materials used to transport gas fuels containing gas condensates and synthetic liquid hydrocarbons with an unlimited content of aromatics.

PN-EN 682 – Testing Requirements

The PN-EN 682 standard specifies both the material properties and qualification tests required for mechanical seals and systems used for transporting gas and liquid hydrocarbons, including those used in refineries and petrochemical plants.

According to EN 682, tested materials must undergo assessments for:

• Hardness

• Tensile strength and elongation at break

• Compression set at high and low temperatures

• Resistance to ageing in air

• Relaxation under force and compression

• Volume change after exposure to Fuel B

• Volume change after exposure to IRM 903 oil

• Ozone resistance

EN 682 – Applications

The EN 682 standard applies to materials designed for the transport of fuel gases containing gas condensates and liquid hydrocarbons with unrestricted aromatic content. It covers seals for all types of pipe joint materials, including iron, steel, copper, and plastics.

PN-EN 682 – Additional Notes

The PN-EN 682 standard does not apply to gaskets made from cellular materials that contain enclosed voids due to their design. It also excludes materials that must meet resistance requirements for radiation and thermal stress, or those containing joints of pre-vulcanised profiles.

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