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Appearance Inspection
Appearance inspection of welded joints is a simple and widely used inspection methods, is an important part of the finished product inspection, mainly to find the defects on the surface of the weld and size deviation. Generally through visual observation, with the help of standard samples, gauges and magnifying glasses and other tools for inspection. If there are defects on the surface of the weld, there is a possibility of defects inside the weld.
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Tightness test
Storage of liquids or gases in the welded container, the weld is not dense defects, such as penetrating cracks, pores, slag, not welded through and loose tissue, etc., can be used to find the tightness test. Tightness test methods include: paraffin test, water test, water flushing test and so on.
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Strength test of pressure vessel
Pressure vessel, in addition to the sealing test, but also for strength test. Commonly, there are two kinds of water pressure test and air pressure test. They can test the tightness of the weld of the container and pipeline working under pressure. The pneumatic test is more sensitive and rapid than the hydraulic test, while the product after the test does not need to be drained, especially for products with drainage difficulties. However, the danger of the test is greater than that of the hydraulic test. When carrying out the test, it is necessary to observe the corresponding safety technical measures to prevent accidents during the test.
