In order to improve detection precision, the method of detecting T-type fillet weld lack of penetration height was discussed using ramp probe in the wing.

The tensile experimental results of four group L 3R welding test specimen included defect free and with above plate part,defect free and no above plate part,with lack of penetration and above plate part,with lack of penetration and no above plate part were presented in this work.

The lack of penetration (LOP) is a very common type of discontinuities in welds,so that how to simplify it more scientifically and reasonable and therefore to conduct its fracture analysis are a problem continuously interested to engineering and academic circles.

Ultrasonic detecting method of incomplete penetration depth of T-joint weld;

Effects of incomplete penetration on the stress concentration of lattice frame empty spheric joint;

However, the researches into the pipe tees with incomplete penetration defects are inadequate.

?The structure of the ellipse tube with incomplete penetration defects is investigated.

Incomplete penetration defect is one of common defects in industrial pressure piping system, few researches was reported at home and abroad.

Safety Analysis of Stainless Steel Piping Containing Incomplete Welding Defects under Proportional Loads;

Aiming at the conservation and localization for dividing grade of incomplete welding defect in Regular inspect criterion for in-service industrial pipelines,static strength analysis and safety assessment for plastic failure of localized wall-thinning flaw for root incomplete welding defects scored 4 degree with different ratio of flaw length to pipe circumference L/(πD)=1,0.

Aiming at the conservation and limitation for dividing grade of incomplete welding defects in Regular inspect criterion for in-service industrial pipelines.