Pressure test items and methods for pressure vessels in Dalian

Test scope: import and export pressure vessel inspection includes the following: pressure vessel design review, operation of pressure vessel quality inspection, pressure vessel installation quality inspection, pressure vessel repair quality inspection, operation of pressure vessel quality inspection. In short, all can affect the safety operation of the pressure vessel project, are the scope of the test.

 During the welding process of stainless steel, the heat affected zone of the weld has a tendency to produce intergranular corrosion, so the welding of stainless steel is required. This plate is easy to ensure that the plate, and when the difference between the two pieces of more, we should pay attention to the thick thin plate.

Ray properties: all electromagnetic waves. The duality of volatility, particle ray characteristics: invisible in a straight line, a diffraction, diffraction can penetrate the material, the material can make the ionization film, also can make the sensitizing material to produce fluorescence, damage to living cells.

By reducing the amount of carbon and increasing the amount of alloying elements to ensure strength, at the same time by improving smelting technology to reduce impurities to ensure that the crack resistance and toughness. At present, the smelting technology in Japan has been able to reduce phosphorus content to 0.01%, sulfur content decreased to below 0.002%. With the continuous development of smelting technology, there have been a good steel plate with high wire energy, and the use of composite steel plate is more and more common.

Overall inspection is the inspection of the pressure vessel stop in Dalian. Full inspection shall be conducted by inspection agencies. The inspection cycle for safety grade 1, grade 2, generally every 6 years, conducted jointly by the use of units and inspection units; safety grade is 3, average once every 3~6 years, conducted jointly by the use of units and safety inspection unit; in grade 4, the test period is determined by the inspection authority.