JIS Z 3104 PDF

Table 4. With this respect the thinnest wire shall be placed outside. The penetrameter may be placed on the film side if the distance between the penetrameter and the film is apart by at least 10 times the minimum perceptible wire diameter. In this case, the symbol F is placed on each part of the penetrameter so as to identify on the radiograph that the penetrameter is placed on the film side. Where, f is the dimension mm of radiation source, and d is the minimum perceptible wire diameter mm of the penetrameter specified in Table 9.

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Table 4. With this respect the thinnest wire shall be placed outside. The penetrameter may be placed on the film side if the distance between the penetrameter and the film is apart by at least 10 times the minimum perceptible wire diameter. In this case, the symbol F is placed on each part of the penetrameter so as to identify on the radiograph that the penetrameter is placed on the film side.

Where, f is the dimension mm of radiation source, and d is the minimum perceptible wire diameter mm of the penetrameter specified in Table 9.

However, in the case of the simultaneous radiography of the full circumference specified in Fig. In this case, care should be taken not to overlap two strip-shaped penetrameters each other or the strip-shaped penetrameter with the contrast indicator. However, one strip-shaped penetrameter may be acceptable when the effective length L3 of the part can be sufficiently covered with one strip-shaped penetrameter. In this case, the penetrameter shall be placed so that the wire diameter to be perceived of each penetrameter is on or outside the boundary line of the respective effective length L3 and also the thin line is outside thereof.

One strip-shaped penetrameter shall be used when it is infeasible to place two penetrameters within the range of the effective length L3 of the test part. In this case, the contrast indicator shall be placed on the film side of the base metal part not so far from the middle of the test part.

However, the contrast indicator may be placed on the radiation source side when the value of the contrast indicator is not less than the value as shown in Table However, even through in the case where the distance between the radiation source and the film is smaller than the radius of the pipe, the symbol may be placed outside the pipe if the relative position is clarified previously where the symbol is placed inside and outside the pipe according to the geometric relationship of the radiographing arrangement.

When the detection of the transverse cracks in the test part is especially required, the effective length shall meet the requirements of the minimum perceptible wire diameter of the penetrameter, the density range of the radiograph and the value of the contrast indicator, and also shall be in the limit specified in Table 6.

In this case, the contrast indicator shall be used in accordance with 8. However, this dose not apply if the penetrameter specified in Table 10 is identificable. One strip-shaped penetrameter may be acceptable when the effective length L3 can be sufficiently covered with one strip-shaped penetrameter.

If the effective length L3 can not be sufficiently covered with one strip-shaped penetrameter, however, each one strip-shaped penetrameter shall be placed on the positions including both ends of the effective length L3 of the test part. In this case, two strip-shaped penetrameters shall be placed so as to avoid overlapping. In this case, the thinnest wire shall be placed outside, and the penetrameter shall be placed on the surface on the radiation source side of T2 member or on the film side.

When the penetrameter is placed on the film side, the distance between penetrameter and the film shall be at least 10 times the minimum perceptible wire diameter. However, in the case of Fig. Where, f is the dimension mm of the radiation source, and d is the value of the minimum perceptible wire diameter mm specified in Table Those image qualities shall be applied as shown in Table 7 according to the type of welded joint.

Table 7. Classification of application of image quality of radiograph Type of welded joint Butt welded joint in steel plates and other welded joints deemed as equivalent thereto in geometric conditions in the radiographic examination. Table 8.

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JIS Z 3104.pdf

Jutaxe Weak Point Non-relevant signal and noise are disturbed evaluation. Easy for detecting a superficial discontinuity. UT Advantage Easy for detecting a plain type discontinuity. Comparatively, cost for testing is higher than others.

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JIS Z 3104 PDF

Tektilar Methods of Radiographic examination for welded joints in stee.. INIS Non-relevant signal and noise are disturbed evaluation. Publication Year Publication Year. Thinner coating covered a surface discontinuity is not disturbed for detecting by this method. Coupling medium must be applied on surface of subjects for testing Generally, not evaluate the kind of discontinuity. The main points of the revision in the standard proper and the appendices for the cases of steel plate welded joints, the circumferential joints of steel pipes, the T-shaped joints of steel plates and the method of classifying flaw images by radiographs are described.

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