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What problems should be paid attention to in flange maintenance?

Source: Baolu Heavy    Hits:

  Stainless steel flange expansion joints all play a role of expansion and expansion compensation for the operation of the pipeline. Because they have this commonality in the pipeline connection, they have a complementary role in the pipeline connection and the expansion joint interchangeability. Under the circumstances, a certain model series of pipe fittings are selected for use. And whether this connection is in the sliding pipeline, the corner of the pipeline and the water pump valve, whether there are fixed buttresses, buttresses and directional limit buttresses in the pipeline, which type of pipe joint should be selected reasonably. What problems should be paid attention to in the maintenance of stainless steel flange expansion joints?

  The performance of stainless steel flanges, flanges are also called flanges or flange plates. It refers to the parts used when connecting pipes with pipes and valves. There is a gap between the flanges, so bolts are needed to connect the two flanges tightly, and the flanges are sealed with a sealing ring while connecting, so as to ensure that no leakage occurs. Stainless steel has good corrosion resistance and can maintain the integrity of the design.

  stainless steel flange expansion joints are mainly used to provide great convenience for the installation, maintenance and replacement of valves, pumps, water meters and filters on various water supply and drainage pipelines. The expansion and contraction of the water supply distance pipeline due to the temperature difference plays a regulatory role. It is characterized by large expansion and contraction, simple and convenient installation, and convenient maintenance during work. Because of its excellent material, it also has high pressure and high temperature resistance. It is suitable for transporting hot water, steam, gas, various oils, and the temperature is the same as that of the pipeline.

  Many people also pay attention to the maintenance of flange expansion joints. How to use stainless steel flange expansion joints in actual use to extend its life? Let’s briefly introduce the maintenance methods:

  Method 1: The stainless steel flange expansion joint is coated with epoxy resin paint to prevent corrosion, and the paint is evenly and densely coated on the surface of the derusted metal pipe to isolate it from various corrosive media. This is the basic method for pipeline corrosion protection. one. Since the 1970s, the laying of pipelines in harsh environments such as the land and ocean, and the increase in temperature of the pipeline due to the heating and transportation of oil, have put forward more requirements on coating performance. Therefore, pipeline anticorrosion coatings are increasingly using composite materials or composite structures. These materials and structures must have good dielectric properties, physical properties, stable chemical properties and a wide temperature range.

  Method 2: Anti-corrosion coating on the wall of the expansion joint of stainless steel flange: Anti-corrosion coating: a film applied to the inner wall of the pipe in order to prevent corrosion in the pipe, reduce frictional resistance, and increase the throughput. Commonly used coatings are amine cured epoxy resin and polyamide epoxy resin, and the coating thickness is 0.038 to 0.2 mm. In order to ensure that the coating is firmly bonded to the pipe wall, the inner wall of the pipe needs to be surface treated. It can also be fixed by pipe clamp supports in the entire pipeline, and an insulation layer is added to perform the anti-corrosion effect of the entire pipeline together with the stainless steel flange expansion joint pipe layer and pipe wall.