3 tubing if the traditional welding operation, many of the inner wall of the pipe coating done will be destroyed. So specification galvanized pipes, plastic-lined steel pipe, plastic composite pipe and so should not be used for welding and flange connection, or need secondary treatment. His connection with unique flexible characteristics, so that the pipeline has an anti-vibration, anti-shrinkage and expansion capability, and the flange connection with welding stability as compared piping system is increased, is more suitable for changes in temperature, thereby protecting the pipeline valves, piping stress also reduces damage to structural components. 4 wear pump tube made of special steel materials, through the inner arm quenching, carburizing chemical treatment, flange bushing hardness of 58-60 degrees, the life of the pipeline increased 3-5 times, allowing users to save time and money, free went to the trouble of constantly changing tubes, improve production efficiency. Concrete delivery pipe products and specifications hardened tissue Description: The name of the organization Hardness HRC thickness mm pearl base metal is mainly used for concrete delivery pipe wear three ones "," United "," Heino, "" race, "" Elephant " "Shi Wei Yan," "Far East", "Xu workers" and other series of car and trailer pump pump Boom tube and fittings are praised by users and praise. I hit straight wear-resistant packaging, in goods factory, the good spray paint, stickers, ready to mark, waiting paint dry playing packaging, do not worry about the paint on the loading or quit playing packaging tubes get ugly phenomenon, not falling paint