Weifang Juntong Machinery Auxiliaries Co., Ltd ——A professional manufacture in ductile iron grooved pipe fittings with FM UL certificates. We could supply grooved rigid coupling, flexible coupling, elbow, tee, flange , reducer ,cap end ,etc.1.we are professional manufacturer with UL FM CUL,we have 14years experice in producing grooved couplings and pipe fittings.2.we have 15 furnaces,7 auto casting lines,5 paiting lines,50CNC machines3.we have been approved by CE ISO UL CUL FM.4.our products are heavy weight and good quality,we have testing pressure videos5.we have three factories,we are professional