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标题: 胶片等级问题 [打印本页]

作者: 谢东冬01    时间: 2017-8-9 16:41
标题: 胶片等级问题
本帖最后由 谢东冬01 于 2017-8-9 16:44 编辑

请问,接触过欧标的朋友G2类胶片是个什么等级?相当于国标的C?急!
原文是这样描述的(仅此):
Practical experience showed that the best possible test result will be achieved by angular radiation (exposure arrangement see figure 1). Testing shall be in accordance with DIN EN 1435, testing category B, i.e. as a rule by X-rays. The use of gamma rays (lr 192) shall be allowed in special cases only.

Vacuum-packed radiographic films of category G2 shall be used with screen combinations adjusted to the respective maximum energy. (A standard concerning the classification of X-ray films is in the course of preparation. Pending its publication, an assignment of film types to film categories authorized by the working group NMP 822 of the Normenausschuss Materialprüfung NMP (Standardization committee material testing) is applicable, published in the DIN-Mitteilungen. Reprints can be obtained from the NMP office).


The radiographic films (length 48 cm) shall be positioned so as to include the butt welds (transverse welds).




作者: yanghaiquan    时间: 2017-8-14 15:17
欧标的胶片分类也是C几,是打错了吧
作者: 谢东冬01    时间: 2017-8-16 16:33
yanghaiquan 发表于 2017-8-14 15:17
欧标的胶片分类也是C几,是打错了吧

甲方给的文件,估计是错了吧,,,我也找不到这个类别

作者: 大师兄断水流    时间: 2017-8-18 22:41
我是新人,在这里向大家请教个问题,如图的小径管底片,中心一圈白色,可能产生的原因是什么
作者: songgc    时间: 2017-12-14 20:56
很规则的一根丝,是不是像质计
作者: ZMJ    时间: 2017-12-25 15:11
大师兄断水流 发表于 2017-8-18 22:41
我是新人,在这里向大家请教个问题,如图的小径管底片,中心一圈白色,可能产生的原因是什么 ...

焊工水平不错哦,单面焊双面成型,内部余高均匀




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