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Welding king combination nipple from the quality can be divided into several grades?

Source： Notetime： 2014-03-20 15:45:55 click： 2758

　　In king combination nipple welding process, the welding parameters setting unreasonable or improper structure design, can cause quality problems, and even the emergence of waste.For king combination nipple welding quality, joint should have a certain strength, this mainly depends on the nugget size (nugget diameter and penetration rate); metal structure zone and defect affecting nugget and the surrounding heat. Welding king combination nipple quality detection has an important position in the welding process, the welding and the use of different materials, quality inspection standards are also different. In foreign countries and our military and civilian products, according to the welding pieces of bearing capacity and stress state, the importance of welding materials in the system performance and welding, the welding joint is divided into one or two and three grade:

　　A: under static load, dynamic load or alternating load, the joint failure would endanger the life safety of personnel.

　　Level two: under static load, dynamic load or alternating load, the joint failure would cause the system to fail, but not to endanger the life safety of personnel.

　　Level three: general joint subjected to smaller static load or dynamic load.

　　The king combination nipple in actual production process some process is commonly used and some common welding king combination nipple quality problems and structural problems, we give the analysis and explanation, hope can give you some help. We summarize the defects of common point, seam welding joint should pay attention to the problem and the main quality problems and spot welding structure parts.

　

from：http://www.bauercoupling.com/newsd-nid-174.html