What ductile pipe A pipe B is?

What ductile pipe A pipe B is? A pipe is ductile plate bearing short tube, a flange, a pipe with a socket A tube! B ductile pipe is inserted a short tube plate is a band flange with a socket pipe fittings B! Shandong ductile iron pipe plant (Liaocheng Hongfu Industry Co., Ltd) is a high-quality ductile iron pipe factory, specialized in GB ductile iron pipe, flexible cast iron pipes, W-type T-type B-piece, three, four cast iron pipe fittings, ductile pipes understand Shandong latest wholesale price, please contact Shandong ductile pipe wholesalers, Liaocheng Hongfu Industry! We will provide quality service, high quality products, low prices to new and old customers demand satisfaction!