ASTM A209 T1 seamless steel tube magnetic particle inspection or penetration inspection, can effectively find surface cracks, folds, double skin, hair lines, pinholes and other surface defects. For ferromagnetic materials, magnetic particle detection method should be preferred, because of its high detection sensitivity; For non-ferromagnetic materials, such as stainless steel seamless steel tubes, the penetrant testing method is used.
ASTM A209 T1 seamless steel tube when the two ends of the reserved excised margin is small, due to the structure of the detection device, the two ends sometimes can not be effectively detected, and the end is likely to have cracks or other defects.
If there is a potential crack tendency at the end, the effect of welding heat during installation may also cause the potential crack to propagate. Therefore, attention should also be paid to the detection of a certain area of ASTM A209 T1 seamless steel tube after welding to timely detect the expansion of defects at the end of the steel tube.