JB/T 3878.5-1985 插入焊接式变径管接头

中华人民共和国机械工业部部标准JB38785-85插入焊接式变径管接头本标准规定了插入焊接式变径管接头,适用于油、气为介质的管路系统其余标记示例:管子外径D为28mm,变径D1为50mm的插入焊接式变径管接头管接头28/50JB38785-85mars公称压力钢管外径DDbalD0,5重.量0.4±0.5g2816230.0793218100.1182435221001484026110.2201826342281112024冒503413290.4096345180.7767656200985160906522422.037321890.l0824352201384026100.211262042023720,513503412290.397634517350.76476561939097390|621422.024机械工业部1985-02-06发布1985-07-01实施4443785-8续表公称压力钢管外径D重量05b盘r+0士0.5kg3522240.13140269o204242280.2302222550341142939I6345350756765620390965906522422.01540260.18226422802850341k290.8672525.55451635073176561939093390652142198842288260185503410290.34460281628563451416350.70576180.9J1901942195650341003706345135034932183255617Q873906520421.920634513350.631223557656390.83190520421.875765617S907604026906519804242284259061817675050,56517206249042634564l6221280技术条件按JB38788-85的规定。45