Stainless steel flange expansion joints are used to compensate the displacement of the pipeline. Because they have this common feature in the pipeline connection, they can complement each other and the expansion joints can be interchanged in the pipeline connection. Only under certain circumstances can a certain type of pipe fitting joints be selected for use. And whether the joint is between the sliding pipe, the pipe corner and the pump valve, whether there are fixed buttresses, infinite buttresses and directional limit buttresses in the pipe, and which series of pipe joints above should be selected reasonably. What should be paid attention to in the maintenance of stainless steel flange expansion joint?
Stainless steel flange expansion joint stainless steel flange has excellent performance, flange is also known as flange or flange plate. It refers to the parts used to connect pipes to pipes and valves. There is a gap between the flanges, so bolts are needed to connect the two flanges tightly, and at the same time, sealing ring is also needed to seal the flange, so as to ensure no leakage. Stainless steel has good corrosion resistance and can maintain the integrity of the design.
The stainless steel flange expansion joint is mainly for the installation, maintenance and replacement of valves, water pumps, water meters and filters on various water supply and drainage pipelines. The distance between feed water and pipeline is adjusted due to temperature difference. It is characterized by large expansion, simple installation and convenient maintenance. Because of its good material, it also has the performance of high pressure resistance and high temperature resistance. It is suitable for conveying hot water, steam, gas, various kinds of oil, and the temperature is the same as the pipeline.
Many people will also pay attention to the maintenance of flange expansion joint. How to use stainless steel flange expansion joint to prolong its service life in actual use? Let's briefly introduce the maintenance method:
Method 1: the stainless steel flange expansion joint is coated with epoxy resin paint for anti-corrosion, and the coating is evenly and compactly applied on the surface of the derusted metal pipeline to isolate it from various corrosive media, which is one of the basic methods of pipeline anti-corrosion. Since the 1970s, more and more requirements have been put forward for the coating performance due to the high temperature rise caused by the laying of pipelines in the harsh environment such as remote and marine, and the heating and transportation of oil products. Therefore, more and more composite materials or composite structures are used in pipeline anti-corrosion coating. These materials and structures should have good dielectric properties, physical properties, stable chemical properties and wide temperature range.
Method 2: stainless steel flange expansion joint wall anti-corrosion coating: anti-corrosion coating: in order to prevent corrosion in the pipe, reduce the friction resistance, improve the throughput and coating on the inner wall of the pipe. The commonly used coatings are amine cured epoxy resin and polyamide epoxy resin. The coating thickness is 0.038-0.2mm. In order to ensure that the coating is firmly bonded to the pipe wall, surface treatment should be carried out on the inner wall of the pipe. It can also be fixed with clamp support in the whole pipeline, and then added with insulation layer to achieve the anti-corrosion effect of the whole pipeline together with the stainless steel flange expansion joint pipe layer and pipe wall.