This standard specifies the type, size and technical conditions of the ferrule type taper thread tee joint body. This standard is applicable to piping systems for automotive oil, gas and general corrosive media with a pipe outer diameter of 4mm~35mm and a maximum working pressure of 10MPa~25MPa.
QC/T 402-2013 Referenced Document
GB/T 12716 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads
GB/T 196 General purpose metric screw threads--Basic dimensions
GB/T 197 General purpose metric screw threads—Tolerances*, 2018-03-15 Update
GB/T 3 Run-outs, undercuts and chamfers for general purpose metric screw threads
QC/T 402-2013 24°cone connectors.Male branch tee.Body was changed to NS 3420-Q-2014 Specification texts for building, construction and installations - Part Q: Timber works.