AliGrailly
Mechanical
- Dec 8, 2020
- 72
Hi
Less than 80%
be conducted at a temperature lower than the design minimum temperature by an amount equal to the difference (referring to Table 323.3.4) between the temperature reduction corresponding to the actual material thickness and the temperature reduction corresponding to the Charpy specimen width actually tested.
Base Metal = 8 mm
Obtainable Specimen = 3 mm
80% of 8mm = 4mm
So 3mm less than of 80%
If code required impact temp -50C
the obtainable specinen should be tested at -77.2C? Or i did not understand what this para stated.
Ref to table 323.3.4 3mm ... 22.2c temp reduction
Less than 80%
be conducted at a temperature lower than the design minimum temperature by an amount equal to the difference (referring to Table 323.3.4) between the temperature reduction corresponding to the actual material thickness and the temperature reduction corresponding to the Charpy specimen width actually tested.
Base Metal = 8 mm
Obtainable Specimen = 3 mm
80% of 8mm = 4mm
So 3mm less than of 80%
If code required impact temp -50C
the obtainable specinen should be tested at -77.2C? Or i did not understand what this para stated.
Ref to table 323.3.4 3mm ... 22.2c temp reduction