What Are The Causes Of The Stainless Steel Flange Accident

What are the causes of the stainless steel flange accident? Stainless steel flange more and more accidents in recent years, caused a great harm to personal, natural gas transportation problems has been a problem of engineering personnel, domestic also have a lot of such accidents, because of natural gas leakage cause frequent accidents, and gas leakage is mainly due to stainless steel flange connection leakage, how to solve this problem is directly related to the important content of the production safety. There are many leakage factors in stainless steel flange connection, such as electrochemical corrosion of buried steel pipe perforation and leakage, pipe welding cracking and leakage, however, most of the leakage points in the carbon steel flange connection, such as shougang gas leakage accident, the urban gas transmission and distribution system equipment, pipe connection, especially in the storage and distribution station, voltage regulating facilities, valve well, metering, use numerous flange interfaces. Pipeline corrosion is the cause of pipeline and stainless steel flange accidents.in recent years, Due to the electrical method protection, Advances in technologies such as anticorrosive coatings and yellow jackets, The damage of the stainless steel flange has been greatly reduced due to corrosion, According to the OPSO statistics, At 79 percent, Internal corrosion is 21%, Only 5% of construction defects occur on operating lines and stainless steel flanges, These defects are mainly after the completion of ring-joint testing and pressure testing, Under the pipeline trench, In the process of backfilling, Broken by the pipeline, So that to leave hidden dangers in the process of operation, It should also be particularly noted that, For operating lines and stainless steel flanges, The longer the service life of the pipeline is used, The higher the accident rate is.Flange connection is connecting two pipes, fittings or equipment. Now each is fixed to a flange, then padded between the two flanges, and finally a removable joint is tightened with bolts to bind it closely. So the sealing ability must be good.