Stainless steel pipe fittings with flat joint require high quality of pipe material, and have higher requirements for the outer diameter ellipticity, wall thickness and physical function of rubber ring of drainage cast iron pipe. Because of the poor precondition of water tightness function of flat mouth, high pressure flange should pay special attention to pipe material besides strictly controlling the quality of pipe material and pipe fittings. Maintenance of pipe end, ellipticity and flatness of butt welding elbow guaranteed pipe end. The installation construction should be strictly carried out in accordance with the operation procedures. Stamping elbow is special in that the riser is fixed on the load-bearing wall of the building with a riser card at the interface of each pipe when the straight pipe is installed; the horizontal pipe should be installed with a hanger at each interface, and in the toilet bathroom where the hygienic appliances are more centralized, if the distance between the two interfaces of the connecting hygienic appliances on the horizontal branch is not more than 600 mm, the riser can be fixed in the center. Set up a hanger.
Seamless stainless steel pipe fittings are long steel strips with hollow sections and no seams around them. The thicker the wall thickness of seamless stainless steel pipe, the more economical and applicable it is. The thinner the wall thickness, the higher the processing cost will be. The pipe fittings have hollow cross section, which is a kind of pipeline to deliver fluid and some solid substances of natural gas, oil, gas and water turbine. Compared with solid steel such as round steel, seamless stainless steel pipe has the same bending and torsional strength, the lighter the weight is, and it is a kind of steel with economic section. It is widely used in manufacturing structural and mechanical parts, such as steel scaffolding, bicycle frame, automobile transmission shaft, oil drill pipe and so on.