Tube is a low-pressure pump tubing, it also divided into high and low-pressure pump tubing tube flange with different diameter (eg 148mm, 157mm, etc.) have different product categories. With the advent of concrete pump while the emergence of a new type of construction works accessories, it appears to greatly improve the efficiency of the construction and mode of operation of the previously required manual or crane with buckets or a doo changed the Fast pouring concrete transported to local needs, so that the construction efficiency is improved in recent times. Low pressure pump pipe processing by ordinary 20 # carbon steel, the fluid pipe or straight seam pipe, processing. Is the use of sets of bending the elbow bending mold, no matter what kind of machinery and equipment, most of them use the elbow, mainly for the oil, gas, fluids, etc., in the aircraft and its engines more plays an important position. Since the length of each of the tubing is limited, but the construction site is very long, and therefore requires a lot of root tubing, which is related to the problem of the connection of the pump tube. First: If the tubing is used in conventional welding operation, many of the inner wall of pipeline coatings are done will suffer damage. So the system requires galvanized pipes, plastic-lined steel pipe, so instead of using plastic composite pipe flange welding and other devices to connect, otherwise you will need for secondary treatment. This method is less demanding for the pressure. Second: the tubing through a tube connected to this card is the most common way to connect, as long as the two pump tube by tube snap up two to complete the task, and very convenient. Pipe card is selected according to the size of the main pressures. Pump pipe insulation measures could be considered, concrete construction concrete in winter so from a plastic state becomes hard as stone solid, mainly produces gel, the gel from the water fresh concrete after the cement hydration can be divided into two parts: water adsorbed at the surface of the particles and the composition of the material in the capillary, from the hydration of cement particles become 'hydration water' which allows part of the water; another portion of water present in the composition of voids between material particles and become 'free water'. Only when concrete pouring and play ease of play.