Abrasion Resistant Pipeline Fittings Our abrasion-resistant pipeline fittings are designed to prevent both of these problems. The diamond-shaped pipe elbow interior finish was developed for durability. It resists abrasion and dramatically reduces the occurrence of fines and streamers. And because we know that process plants come in all shapes and sizes, the fittings are available in a range of configurations to meet your pipeline layout needs. Cast aluminium pipe fittings designed to withstand the wear and tear of abrasive polymer materials in pneumatic conveying applications