Wire IQI

حکم اعدام ظریف در دادگاه صحرایی چه معنایی دارد؟ - فرارو

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۱۳ بهمن ۱۴۰۳  ... ظریف برکنار و محاکمه شود. اما در تجمع مشهد، مشخص شد ظریف در یک دادگاه صحرایی محاکمه و به اعدام، حبس و محرومیت از حقوق اجتماعی محکوم شده است.

According to my calculation, as per asme sec v table t-276,

Film side Wire iqi for 10mm job thick - wire no is 6.

Wire no 6 is 0.25 thk , hence, sensitivity = 0.25 X 100 /(10+3 Reinforcment ) , so sensitivity is 1.9% arrived.

Sensitivity should be less the 2% : 

1.8 minimum for single film viewing for radiographs made with an X-ray source

2.0 minimum for radiographs ( فیلم ها )  made with a gamma ray source

Article 2

T-234 Facilities for Viewing of Radiographs

Viewing facilities shall provide subdued background lighting of an intensity that will not cause troublesome reflections, shadows, or glare on the radiograph. Equip- ment used to view radiographs for interpretation shall provide a variable light source sufficient for the essential IQI hole or designated wire to be visible for the specified density range. The viewing conditions shall be such that light from around the outer edge of the radiograph or coming through low-density portions of the radiograph does not interfere with interpretation.

T-276.2 Size.

The designated hole IQI or essential wire shall be as specified in Table T-276. A thinner or thicker hole-type IQI may be substituted for any section thickness listed in Table T-276, provided an equivalent IQI sensitivity is maintained. See T-283.2.

(a) Welds With Reinforcements. The thickness on which the IQI is based is the nominal single-wall thickness plus the estimated weld reinforcement not to exceed the maximum permitted by the referencing Code Section. Backing rings or strips shall not be considered as part of the thickness in IQI selection. The actual measurement of the weld reinforcement is not required.

(b) Welds Without Reinforcements. The thickness on which the IQI is based is the nominal single-wall thickness. Backing rings or strips shall not be considered as part of the weld thickness in IQI selection.

When the density limits of T-282.2 cannot be met with one IQI, and the exceptional density area(s) is at the interface of the weld metal and the base metal, the material selection for the additional IQIs shall be based on the base material and be in accordance with T-276.1.

T-282 Radiographic Density

T-282.1 Density Limitations. The transmitted film density through the radiographic image of the body of the appropriate hole IQI or adjacent to the designated wire of a wire IQI and the area of interest shall be 1.8 minimum for single film viewing for radiographs made with an X-ray source and 2.0 minimum for radiographs made with a gamma ray source. For composite viewing of multiple film exposures, each film of the composite set shall have a minimum density of 1.3. The maximum density shall be 4.0 for either single or composite viewing. A tolerance of 0.05 in density is allowed for variations between densitometer readings.

T-282.2 Density Variation

(a) General. If the density of the radiograph anywhere through the area of interest varies by more than minus 15% or plus 30% from the density through the body of the hole IQI or adjacent to the designated wire of a wire IQI, within the minimum/maximum allowable density ranges specified in T-282.1, then an additional IQI shall be used for each exceptional area or areas and the radiograph retaken. When calculating the allowable variation in density, the calculation may be rounded to the nearest 0.1 within the range specified in T- 282.1.

(b) With Shims. When shims are used the plus 30% density restriction of (a) above may be exceeded, provided the required IQI sensitivity is displayed and the density limitations of T-282.1 are not exceeded