jb4730与asme比较（jb4730与asme比较）.docVIP

jb4730与asme比较（jb4730与asme比较） Standard The JB4730 standard and ASME standard Comparison of radiographic testingrequirements Ma Xiao (Nanjing Chemical Company chemical machinery factory, Nanjing 210048) Abstract: the discussion on JB 4730 and ASME - 1994 Standard Specification in X-ray detection in some different points, including. Measuring scale, geometric unsharpness, radiographic thickness, density, sensitivity and film evaluation. Keywords: X-ray inspection; SPECIFICATION; standard; boiler; pressure vessel CLC number: TG115.28 document code: B article number: 1000-6656 (2002) 11-0497-02 COMPARISON OF RADIOGRAPHIC TESTING REQUIREMENTS BETWEEN STANDARD JB4730AND ASME CODE MA Xiao (Chemical Industrial Machinery Works Nanjing Chemical Industrial, Co., Ltd, Nanjing 210048, China) Abstract: Some differences are discussed about standard JB and ASME code 4730 - 1994 in terms of radiographic testing, in- Cluding testing ratio, geometric unsharpness, radiographic thickness, density sensitivity, and film evaluation. Keywords:Radiographic testing; Code; Standard; Boiler; Pressure vessel Boiler and pressure vessel manufacturing and inspection, involving a variety of rules Norm and standard. At present, foreign pressure vessel standard is the most used The ASME specification. The specification related standards in China have a lot The same point. The 1998 edition, 2001 edition of the 2000 supplement and ASME Standard fifth and eighth volumes of first volume [1] and pressure vessel in China. The [2] GB 150[3], technical regulations and standards such as 4730[4] JB Comparison of some aspects of the request to close the X-ray detection. The detection ratio of 1 Boiler and pressure vessel safety technology and GB 150 According to the relevant provisions of the proportion of different weld detection, in product nameplate We should make the detection ratio of the markers, such as 100% and 20%. ASME eighth volume first volume UG116 provides four different kinds of standard Remember,