Steel pipe inspection process three points

　　No matter seamless steel pipe or welded pipeline, we should have check methods for the final products in order to guarantee the quality. Here are three main points for the tube’s inspection process.

　　There is no cracks, lack of fusion, porosity, slag and spatter for the welded joint’s surface. As these drawbacks would finally have big influence for the good quality of a steel tube. Pipeline design temperature is below -29 degrees, fan ruler of hardened stainless steel and alloy steel pipes tend to be larger weld surface, without undercut.

　　Nondestructive test is necessary on the pipe’s surface. Different steel pipe with various functions should take different pressure taking. Thus, magnetic iron pipe should be used in magnetic particle testing; non-ferromagnetic steel should be used in penetration testing.

　　Ray inspection and ultrasonic testing. Ray inspection and ultrasonic testing is the main target of the butt joint pressure pipe and pipe fittings for butt joints.

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