, Material Test Reports Supplied, Meets BPE Specifications S2S88 - BPE WELD LONG 88° ELBOW - 20RA ID, 32RA OD - 3/4", Commonly referred to as butt weld fittings, these stainless steel sanitary fittings are welded to connect to tubing or other fittings for a permanent and flush connection..BPE (BioProcessing Equipment) sanitary fittings are highly polished making them suitable for pharmaceutical processing.