Analysis of structural discipline welding disables in Saudi Aramco project using statistical process control in PT. Mcdermott Indonesia

Abstract

It is known that some welding results were defect in the Saudi Aramco project, particularly at the TKY joint and splice joint, thus there is a reparation needed with the specific type of defect which is lack of fusion. The method used is the Pareto diagram, control diagram and fish bone diagram -to find out the graphs and the causes of the resulting structural welding results. The results shown by the pareto diagram state that for an event, about 80% of the effect is caused by 20% of the cause, the type of damage that often occurs in the welding results caused by a lack of fusion is 50%, consisting 23 joints of the 46 joints produced. Meanwhile, from the control chart, all data of the structural welding have been placed at the control limit. Based on the fish bone diagram, some of the causes the lack of fusion defect are because several factors such as human, machine and method, material and environmental factors.

Tensile Strength Characterization of Quenched and Self-Tempered (QT/TMT) Reinforcing Coupled and Welded Steel Bars

“…Welding of steel bars, on the other hand, is claimed to have weakened [12] as the section or portion subjected to welding is considered a Heat Affected Zone (HAZ) [13]. Since the NSCP provision is strictly followed by the Association of Structural Engineers of the Philippines, Inc. (ASEP), members of the PISI continue to seek clarification, or appeal, on the implementation of such provisions since they will have significant economic effect in both industries and stakeholders.…”