ISO 9606-3 PDF

Therefore, the welder who is qualified according to these standards shall fulfill the requirements of these standards independently from the place, examiner and the type of product. However, in this review we will discuss about non-conformities in these international standards and their results that could cause differences in the condition of qualification according to examiner decision with refer to unclearness and mismatches in these standards. These non-conformities are about the use of shielding gasses, range of approvals, normative references and evaluation of imperfections etc. Introduction Advertisement Welder qualification standards define the qualification tests for welders. Welding positions In version of this standard we have some pictures that clear the welding positions for qualifying the welders , we have butt welding on pipe in PC position and it is written that the pipe must be fixed , the weld axis is vertical and weld is horizontal Figure 1.

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Therefore, the welder who is qualified according to these standards shall fulfill the requirements of these standards independently from the place, examiner and the type of product. However, in this review we will discuss about non-conformities in these international standards and their results that could cause differences in the condition of qualification according to examiner decision with refer to unclearness and mismatches in these standards. These non-conformities are about the use of shielding gasses, range of approvals, normative references and evaluation of imperfections etc.

Introduction Advertisement Welder qualification standards define the qualification tests for welders. Welding positions In version of this standard we have some pictures that clear the welding positions for qualifying the welders , we have butt welding on pipe in PC position and it is written that the pipe must be fixed , the weld axis is vertical and weld is horizontal Figure 1.

The question is why the pipe must be fixed, and what if it is rotating and the weld axis is vertical and weld is horizontal, is n, t it PC position, if we have a component that is rotating on a welding positioner then what is the welding position and on the other hand, in ISO that is the Welds-Working positions-Definitions of angles of slope and rotations there is not mentioned that in PC position the pipe must be fixed Figure 2.

This non-conformity is repeated in and versions of this standard. Welder approval test certificate Annex A According to ISO and , the table of range of approval is empty to fill according to the standard Figure 3. However, in ISO dashed line are added in the table of range of approval for shielding gasses and auxiliaries Figure 2. There are two deductions from this dash line in this table: The dash lines mean that only the gas used in the welder qualification test is acceptable and the welder is not permitted to weld with any other gases, in result there is no meaning for the grouping system of the welding gases according to the EN standard if a welder test is with one of the gas mixtures it is not acceptable to weld with the other one and etc.

The second deduction could be a very superficial conclusion that the dash lines mean there is no limitation for the welder to use any type, percentage, or mixture of gases while there are deep differences when a welder use for example an Ar gas or He in welding of aluminum. These changes are made from , the dash lines are added to this table, why, what is the main reason, and meaning is a question. J-L welding positions In all these years and different versions of this standard from to we cannot find J-L positions that are inclined position with fixed axis of pipe and welding in downward position we can find H-L inclined position with fixed axis of pipe and welding in upward position in this standard , figure 1, however we have the downward welding position PG and PJ for aluminum but there is no signification of this welding position Figure 5, 6.

As an international standard, we can find it in AWS D1. Figure 6: Table 6 of ISO In this standard , PE and PC welding positions are pictured for butt welded joint and not for fillet welds. When welding engineers are confronted with these mismatches, some of them draw a conclusion that PE and PC welding positions can be used also for fillet welds, but on the other side the reference standard show something else and in result, it is important that on which side you are, contractor or subcontractor?

In addition, who you are dealing with. This could result in a need to a new welder qualification test or an acceptance according to a self-decision, not according to the standard.

Figure Table 6 of ISO Forward of parts In Figure 11, you can see the mistake happen in the definition of the parts in and in the left side of the picture and on right side of picture, the correct one that must be. Figure Page IV of and Repeated non-conformities If we try to exaggerating mismatches , there are a lot of minor mismatches, there are some non conformities in this standard and other versions that are repeated for many years and different revisions which results in self decisions, discussions and ….

Example No. The welder shall be allowed to remove minor imperfections by grinding, except on the surfaces after finishing the weld. The permission of the examiner or examining body shall be obtained. Figure Part 6. Who must decide between two welding engineer that for example an imperfection seems a minor imperfection for one of them and for the other one is not a minor imperfection. Again, it was a cause to discuss always between the contractors and subcontractors, if it is necessary, there is no reason to make any doubt in standard and if not, it should be omitted from the standards as if it happened in Figure Table 7 of , Acceptance criteria In Normative references of figure 14, 15 quality.

Figure Scope of ISO However, the range of qualification of welders are out of this range and what if we want to qualify a welder on thickness ranges for example less than 3mm thicknesses Figure Figure Range of qualification of material thickness. In conclusion, standards must be clear in a way that users do not need to interpret and discuss, furthermore if the standard is a new one so there could be some missing, faults and needs to improve corrections.

So, it can be suggested to improve new ways to decrease repeated mismatches in worldwide mostly used welding standards.

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