What is preferred over brass for LLDPE tubing applications?

Using plastic crimp rings is preferred over brass for LLDPE (Linear Low-Density Polyethylene) tubing applications primarily due to compatibility and stress reduction. LLDPE is a flexible plastic material that benefits from components that can accommodate its properties. Plastic crimp rings minimize the risk of leaks and stress points that could lead to failure in the system when working with flexible piping materials.

Brass connections, while durable, can create rigid junctions that may not properly align with the motion and expansion of LLDPE tubing. In contrast, plastic crimp rings provide a tighter seal that can flex with the tubing, leading to overall better integrity of the installation. This is particularly important in applications where the tubing may experience movement or pressure changes.

The other materials, such as steel fittings, copper connectors, and PVC joints, may not offer the same degree of flexibility or compatibility with LLDPE tubing, leading to potential issues in installation and long-term performance.