Specifies the structural type and size, technical requirements, test methods, inspection rules, marking, protection, packaging, storage and transportation of positive baffle flange-connected T-type filters. It is suitable for positive baffle flange-connected T-type filters with nominal pressures of PN10, PN16, and Class150 and nominal sizes of DN50 to DN400 (NPS2 to NPS16) used in lubricating oil stations.