ISO 9969 Thermoplastic Pipes - Determination of Ring Hardness

EUROLAB, with its state-of-the-art accredited laboratories and expert team, offers precise and rapid testing services within the scope of ISO 9969 testing. ISO 9969 specifies a test method for determining the ring hardness of circular cross-section thermoplastic tubes.

The stiffness of the ring is determined by measuring the force and deflection when deflecting the pipe at a constant deflection rate. A cut length of a horizontally supported pipe is clamped vertically between two parallel flat plates moved at a constant speed depending on the diameter of the pipe.

A force versus deflection graph is created. The stiffness of the ring is calculated as a function of the force required to create a 3% diameter deflection of the pipe.

Determining ring stiffness is crucial in evaluating the structural performance of thermoplastic pipes, especially in applications where the pipes are subjected to external loads or pressures. Ring stiffness is a measure of a pipe's ability to resist deformation under external forces.

The ring hardness of a material generally refers to a certain amount of deformation under a certain force. This provides information about the durability and mechanical performance of the material. In material selection, especially in applications such as piping systems, ring hardness values ​​are important to understand how the material behaves under various conditions.

EUROLAB assists manufacturers with ISO 9969 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.