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Sampling Inspection Instructions For Equipment Containers

Nov 03, 2017

The fracture steel strip material is 16Mn and is treated by normalizing. The steel belt is wrapped around the φ500cm container simplified, with a $number. 2kPa pretension. In the process of use of water leakage, ammonia plant air humidity. The plant in the overhaul of the equipment found that the outer layer of 8 steel strip total fracture 7.Equipment Containers 

The fracture of 7 steel belts has the same macroscopic morphology and brittle fracture, which has been oxidized and corroded, which is a kind of steel strip. The steel strip surface is dark brown, has the corrosion pit and the corrosion product cover, in the steel belt surface Local area also may observe the crack.Equipment Containers

The samples were used for metallographic examination, the surface of steel strip had corrosion products, the cracks were dendritic and the typical stress corrosion cracks along the grain cracks. The factory site environment atmosphere contains a high sulphur content, mainly from the factory coal emissions. The pressure vessel is mainly used in the chemical industry, the pressure is more than 10 MPa. Ammonia and high-pressure polyethylene and other high-pressure production process, the pressure vessel to withstand pressure to increase to more than 100 MPa.Equipment Containers

With the development of chemical industry and petrochemical industry, the working temperature range of pressure vessel is also more and more wide. The continuous appearance of the new working medium also requires the pressure vessel to be capable of dielectric corrosion. The size of many process devices is increasing, and the capacity of the pressure vessel is increasing.Equipment Containers

The pressure vessel built in the factory weighs up to thousand tons, and the spherical pressure vessel and prestressed concrete pressure vessel manufactured in the field can reach dozens of meters in diameter. Since the 1960s, the development of nuclear power plants has put forward higher safety and technical requirements for reactor pressure vessels, further promoting the development of pressure vessels.Equipment Containers 

Many production processes need to be under pressure and many gases and liquefied gas are stored under pressure, so pressure vessels are increasingly used in various industrial sectors. The development of many new technologies has put forward higher requirements for pressure vessels. such as: the development of coal conversion industry requires a single weight of thousands of tons of high-temperature pressure vessels; The application of fast breeder reactors requires the solution of pressure vessels with high temperature resistance to liquid sodium corrosion; the development of marine engineering requires an external pressure vessel capable of working hundreds of to thousands of M underwater.Equipment Containers