请教此接头型式要做几个工艺评定来覆盖母材厚度？ASME标准

louis

现在产品有个如图所示的焊接接头，从母材覆盖的角度来看，最少需做几个工艺评定才能覆盖焊件？材料：316L

1.有一种说法是要覆盖人孔的壁厚，也就是说我至少要做一个38mm厚的试件进行工艺评定？

2.还有就是此接头算是对接+角接组合型式的焊接接头？

minminsaid

1.按第九卷第二章中焊接变素中QW403.8款按不等厚QW202.4(b)只要做10mm的就可以了
2.是对接+角接组合型式的焊接接头

lyklzy

QW-202.4 Dissimilar Base Metal Thicknesses. WPS qualified on groove welds shall be applicable for production welds between dissimilar base metal thicknesses provided:
(a) the thickness of the thinner member shall be within the range permitted by QW-451
(b) the thickness of the thicker member shall be as follows:
(1) For P-No. 8,------,there shall be no limitation on the maximum thickness of the thicker production member in joints of similar P-Number materials provided qualification was made on base metal having a thickness of 1⁄4 in. (6 mm) or greater.
你产品的材料是 316L , P-No.8, 符合上述条件,因此焊接工艺评定的母材厚度至少是 10 mm。

QW-202.2 Groove and Fillet Welds
(c) Qualification for Fillet Welds. WPS qualification for fillet welds may be made on groove-weld test coupons using test specimens specified in QW-202.2(a) or (b). Fillet-weld procedures so qualified may be used for welding all thicknesses of base metal for all sizes of fillet welds,------。
所以不需要单独再做角焊缝的焊接工艺评定了。

louis

minminsaid 发表于 2012-12-28 18:38
1.按第九卷第二章中焊接变素中QW403.8款按不等厚QW202.4(b)只要做10mm的就可以了
2.是对接+角接组合型式的 ...

谢谢你的回答，算是弄明白了

louis

lyklzy 发表于 2012-12-29 00:28
QW-202.4 Dissimilar Base Metal Thicknesses. WPS qualified on groove welds shall be applicable for pr ...

恩，已经弄明白了，谢谢你的回答

loveevol

学习了，站里的高手还真不少啊。谢谢

zero_xing

学习了，10mm正好