Nylon Tubing (Polyamide Tubing / PA Tubing) Selection Guide

Nylon tubing, also referred to as polyamide (PA) tubing, is a commonly used engineering plastic tubing material in pneumatic and fluid systems.
Based on differences in polyamide molecular structure, nylon materials are available in multiple types. Among them, PA 6 and PA 12 are the two most widely used materials in industrial pneumatic systems. The differences between PA 6 and PA 12 are primarily reflected in material behavior under actual application conditions, rather than differences in performance level or material quality.

Material Behavior Differences Between PA 6 and PA 12

In pneumatic piping applications, PA 6 and PA 12 exhibit different material behaviors when subjected to variations in humidity, temperature, and long-term operating conditions.

• PA 6 (Nylon 6): Due to its relatively higher moisture absorption, the material behavior of PA 6 tubing may vary when exposed to environments with humidity fluctuations.
• PA 12 (Nylon 12): With low moisture absorption, PA 12 tubing is suitable for applications involving humidity variation, outdoor installation, or long-term continuous operation.

The table below compares PA 6 and PA 12 based on material behavior under different operating conditions. This comparison is intended for application selection reference and does not represent performance ratings or material grading.