MSS SP-123-2018涵盖了标称尺寸为1/4至4的铜和铜合金管接头，带有金属对金属阀座，带有焊接接头或螺纹端部连接，并用于符合ASTM B88的铜水管。本标准实施规程包括:a.压力温度比b。端部连接的缩写C。指定配件开口的尺寸和方法d。马克斯。材料F。尺寸和公差g。测验

MSS SP-123-2018 covers copper and copper alloy unions with metal-to-metal seating, in nominal sizes 1/4 through 4, with solder-joint or threaded end connections, and for use with copper water tube that is compliant with ASTM B88. Included in this Standard Practice are:a. Pressure temperature ratingsb. Abbreviations for end connectionsc. Size and method of designating openings of fittingsd. Markingse. Materialsf. Dimensions and tolerancesg. Tests