This document specifies the general requirements, technical requirements, test methods, inspection rules, signs, packaging and storage of Y-type cast iron filters for pipelines (hereinafter referred to as "Y-type filters"). This document is applicable to Y-type filters with nominal size DN50~DN600, nominal pressure PN6~PN40, or Class s75~Cl as s300, medium temperature not greater than 80 ℃ water or other liquids whose physical and chemical properties are similar to water.
GB/T 41681-2022 Referenced Document
GB 5135 Automatic water-spouting fire extinguishing system--Performance requirements and test methods for sprinklers
GB/T 10612-2003 Industrial plate screens--Thickness below 3mm-Round and square holes