The installation of non-metallic compensators requires high standards for the preceding process. The key issues for the two connecting flanges include the following:

(1) Non-metallic compensator flanges must be flat, with a flatness deviation of ±1mm. The two flange faces should be parallel and evenly spaced, with a spacing deviation of ±10mm.

(2) The center hole deviation of the two flanges is ±3mm, and the flange tilt deviation is 0.2‰ of the length.

(3) Non-metallic compensator flanges must be continuously welded. The joint welds require smoothing to be flat with no burrs, sharp edges, or unevenness. The flanges should be free of sharp corners, and the corner radii should be R≥5±2mm.

(4) Ensure all burrs around the flange are thoroughly removed to prevent scratching the non-metallic compensator fiber felt.