Impact test test Requirements

[Uma sankar Sankar]

Good morning experts

      

          In WPS ,from where we need to get Impact test qualified thickness ranges (min - max). what are dimensions of Test coupon,and how can we decide the impact test temperature?why Heat input should be calculated,when ever impact test required in wps,is hardness required for ever joint ? please give ur best in the point of Saudi Aramco projects.

[stephen raj]

for impact test requirements at what temperature? - material-wise reference as we should follow B31.3 table A-1,
Figure 323.2.2A Minimum Temperatures Without Impact Testing for Carbon Steel Materials(refer Table A-1 to find out the impact test requirements as per materials and which graph want to refer)
Table 323.3.5 Minimum Required Charpy V-Notch Impact Values
Table 323.3.4 Charpy Impact Test Temperature Reduction
Table K323.3.1 Impact Testing Requirements
Table A-1 Basic Allowable Stresses in Tension for Metals

The highest heat input reduction in yield strength and low toughness (grain growth) is closely related to hardness, thus heat input calculation is required.