Containment Liner: Envirolock systems are principally comprised of two layers of polyurea. Polyurea is a VOC-free elastomeric polymer that is highly abrasion resistant, has exceptional tensile (elongation) strength, is resistant to chemical attack, remains flexible even at extreme temperatures, will expand up to 400% the original size before it fails, and has exceptional (maintenance-free) longevity. The inner polyurea layer is specified to meet the chemical resistance requirements for the service and to provide the required thermal expansion properties. The outer layer of polyurea is required to provide abrasion resistance, impact resistance and hardness required for the service. For higher pressure applications, a third layer (carbon fibre) is required. For severe chemical environments, a thin layer of a ceramic polymer can be added to the inside of the inner layer of the polyurea liner, specified to resist the chemicals that could come into contact with the containment liner in the event of a pipeline leak.

Annulus: Between the protected pipeline and the outer liner is an annulus space containing “Enviromesh” material (which can be manufactured from a specific recycled, single use plastic). Enviromesh is a porous (40 – 60% air) mat like material that is made of multiple, randomly oriented strands of PVC (or similar) material. Each layer is approximately 9 mm (3/8”) thick and is applied by winding the Enviromesh mat around the pipe. Multiple layers of Enviromesh can be installed to accommodate higher maximum operating pressures. There are two primary purposes for the Enviromesh layer: 1) to dissipate the pressure and force (upwards of 5000 psi or more) emanating from a small leak in the pipe – this ensures that the outer containment liner is not compromised, and 2) to capture and contain any product that leaks from the pipe within the annulus. The Enviromesh layer also provides a pristine environment to house a leak detection system of the customer's choice so that they are able to detect a problem instantaneously while safeguarding the system from degradation due to corrosive ground water, soils, etc.

End caps/Bulkheads: The end caps and bulkheads prevent any product that is leaked into the containment system from migrating past the bulkhead into the adjacent containment sections, thereby limiting the flow of the leaked product to a smaller space/volume, or for the end caps, to prevent leaked products from escaping the containment system and adversely impacting the environment.