JIS Z 3104 PDF

You are on page 1of 31 Search inside document UDC UDC Remarks 1. Definitions - The definitions of principal terms used in this Standard shall. When the thickness of the base metal is different on both sides of the joint, as a rule, the smaller value of the thickness shall be taken.

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You are on page 1of 31 Search inside document UDC UDC Remarks 1. Definitions - The definitions of principal terms used in this Standard shall.

When the thickness of the base metal is different on both sides of the joint, as a rule, the smaller value of the thickness shall be taken. Class A can be obtained in the regular radiographic technique, and class B can be obtained by the radiographic technique with greater sensitivity in the detection of flaws, Class P1 is the regular image quelity obtained when one side of the circumferential welded joint in the steel pipe is radiographically examined and class P2 is the regular image quality when both sides of the circumferential welded joint in the steel pipe is radiographically examined, respectively, with respect to the radiographing method where the radiation ponetrates double walls of the pipe of the circumferential welded joint in the steel pipe.

Class F is the regular image quality obtained by the radiographic examination of T welded joint. Radiographic testing apparatus and its accessories 5. When the intensifying screen is used, the lead foil intensifying screen, the fluorescent intensifying screen or the metallic fluorescent intensifying screen shall be used. For making radiograph of the circumferential welded joint, as a rule, the strip- shaped penetrameter of type F or type S shall be used, but general type penetra- meter of type F or type S or those at least.

K shall be used. Technique for making radiograph 6. Table 2. Necessary conditions for radiograph Necessary conditions for the radio- graph having been taken shall be in accordance with Annex shown in Table 3 according to the type of the welded joint, Further, the radiograph shall be free from irregular development, defects in the film or the like which may interfere evaluation of the image quality and classification of the image of the flaw.

Table 3. Table 4. Records The test results shall include the following items to enable to collate the records with the tested part. Scope This Annex specifies the radiographing method and necessary conditions for radiographs when the direct radiographic examination of butt welded joints in steel plates is executed. 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.

If the effective length of the test part is 3 times the width of the penetrameter or less, one penetrameter may be located in the middle. Annex 1 Fig. When the value of the contrast indicator is greater than the value indicated in Annex 1 Table 6, the contrast indicator may be placed on the radiation source side. Radiographing arrangement — The relative position of the radiation source, the penetrameter, the contrast indicator and the film shall be, as a rule, the arrangement as shown in Annex 1 Fig.

The value m shall be determined in accordance with Annex 1 Table 2 according to the kind of the image quality. The value n shall be determined in accordance with Annex 1 Table 3 according to the kind of the image quality. Annex 1 Table 4. Class B 4. The radiographic density of the part except the image of flaws of the test part shall be in the range as shown in Annex 1 Table 5. The value of the difference in density divided by density of the part of the base metal shall be not less than the value as shown in the Annex 1 Table 6.

Scope This Annex specifies the radiographing method and necessary conditions for radiographs when the direct radiographic examination of circumferential welded joints in stee! The wall thickness of the pipe, in this case, shall be the nominal thickness, and when the wall thickness of the pipes is different on both sides of the welded joint of the steel pipe, the smaller value shall be taken. Annex 2, Table 1. Radiographing arrangement 3.

Where, f is the dimension mm of the radia- tion source, and dis the minimum perceptible wire diameter mm of the 2 3 6 6 13 Z penetrameter specified in Annex 2 Table 3. As to the irradiating direction of the radiation, the center line of radiation flux shall be, as a rule, directed to the middle of the test part, and normal to the film surface.

When the strip-shaped penetrameter of type F or type S is used, each one penetrameter of the minimum perceptible wire diameter see Annex 2 Table 3 shall be placed at the positions including both ends of the effective length L; of the test part across the welded joint on the surface on the radiation source side of the test part. 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 Ls of the test part can be sufficiently covered with one strip-shaped penetrameter. When the general type penetrameter of type F or type S is used, two pene- trameteres with the minimum perceptible wire diameter see Annex 2 Table 8 shall be placed on the surface on the radiation source side of the test part across the welded joint as shown in Annex 2 Fig.

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 effec- tive length Ly 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 Ls of the test part.

In this case, the symbols F shall be placed on each part of the penetrameter so as to identify that the penetra- meter is placed on the film side. 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 Annex 2 Table 5.

However, even though 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 radio- graphing arrangement.

Annex 2 Fig. In this case, the contrast indicator shall be used in accordance with 3. However, this does not apply if the penetrameter specified in Annex 2 Table 3 is identificable.

In this case, two strip-shaped penetrameters shall be placed so as to avoid overlapping. Necessary conditions for radiograph 1 4. The radiographic density of the part except the image of flaws of the test part shall be in the range as shown in Annex 2 Table 4.

The value of the difference in the density divided by the density of the part of the base metal shall be not less than the value as shown in the Annex 2 Table 5. 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 range of the limit specified in Annex 2 Table 6.

Scope This Annex specifies the radiographing method and necessary conditions for radiographs when the direct radiographic examination of T-welded joints in steel plates is executed. 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 the penetrameter and the film shall be at least 10 times the minimum perceptible wire diameter. However, in the case of Annex 3 Fig. Further, in the case of Annex 3 Fig. The value m shall be 6 or 24, whichever is the greater.

Where, fis the dimension mm of the radiation source, and d is the value of the minimum perceptible wire diameter mm specified in Annex 3 Table 1. Annex 9 Fig. Radiation Radiation second time rat time Rediation Annex 3 Fig. Eilon Ponotrameter Compensating wedge Dy om Penetramotar Symbol indicating the effective length of teat part.

The radiographic density of the part except the image of flaws of the test part shall be 1. When the thickness is different on both sides of the butt welded joint in steel plate, the thinner value shall be taken as the thickness of the base metal. In the case of the circumferential welded joint in steel pipes, the thinner wall thickness shall be taken as the thickness of the base metal.

In the case of the T-welded joint, the thickness of the Tl member as shown in Annex 3 Fig. Type of flaw The flaws shall be classified into 4 types in accordance with Annex 4 Table I.

Where itis difficult to classify the flaws into type 1 or type 2, classify respective flaws into type 1 or type 2, and then the larger type and clase number shall be adopted. Score offlaw The score of flaw of type 1 and type 4 shall be obtained as follows: - 1 The score of flaw shall be measured by setting the test field of vision as given 2 3 4 6 6 in Annex 4 Table 2.

The test field of vision shall be applied to the region where the score of flaw becomes maximum in the effective length of the test part. Where the major diameter of the flaw does not exceed the value in Annex 4 Table 4, the flaw shall not be regarded in calculating the score of flaw. Where the flaw of type 1 is coexistent with the flaw of type 4 in one test field of vision, the grand total of both scores shall be the score of flaw. Length of flaw The length of flaw shall be determined by measuring the length of the flaw of type 2.

However, where the flaws are present in a row, and the distance between mutual flaws does not exceed the length of the larger flaw, the dimension being measured including the space between flaws shall be defined as the length of flaw of the relevant flaw batch. Subclassification of flaw 6. The figures in the table show the allowable limit of the score of flaw.

Even when the major diameter of the flaw does not exceed the value in Annex 4 Table 4, there shall not be 10 or more flaws within the test field of vision for class 1. Z The figures in the table show the allowable limit of the length of flaw. Even when the flaw is subclassified as class 1, it shall be categorized as class 2 where the incomplete penetration or the incomplete fusion is found.

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Sitco h 101(j) Rev2 - Jis z 3104(Rt)

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. Local corrosion occurred jia opposite side can be located and the remained wall thickness can be read by continuous searching. Easy to apply in field testing when used portable set. Easy for detecting a plain type discontinuity.

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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.

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