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See Chinese contents: GB/T 41317-2022 GB/T 41317-2022: Stainless steel corrugated tubes for the connection of gas appliances
This document specifies the classification, specifications and models, requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of stainless steel corrugated tubes for the connection of gas appliances specified in GB/T 13611. This document applies to stainless steel corrugated tubes for the connection of gas burning appliances or gas equipment, of which the nominal dimension is not greater than DN32 and the maximum working pressure is 0.01 MPa.
