关于锅炉拉撑焊接处的热处理讨论

大荔出奇迹

在I卷2023版本的PW-19 焊接拉撑 章节，有这样的表述：


“PW-19.7  The welding shall be postweld heat treated in accordance with PW-39"

该条明确了焊接处-即拉撑和管板的焊接处需要做焊后热处理的，随即跳引至PW-39.

“ Table PW-39-1 Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments — P-No. 1
...

GENERAL NOTES:
(a) Postweld heat treatment is not mandatory for P-No. 1 Group 1 materials under the following conditions:
(1) when the nominal thickness as defined in PW-39.3 is 1 in. (25 mm) or less.
(2) when the nominal thickness as defined in PW-39.3 exceeds 1 in. (25 mm), postweld heat treatment is not required when the calculated
carbon equivalent, CE, of each base metal in the weld joint is less than or equal to 0.45 using the following formula, and a minimum preheat of 200°F
(95°C) is applied.
(3) electroslag welds shall follow the postweld heat treatment requirements in PW-27.3 and PW-39.7.
(4) for stays welded in accordance with PW-19, the diameter of the stay is not used to determine the preheat requirement."


在表格PW-39-1线面的注解中，说P-No.1的材料在下列条件下的焊后热处理不是强制的...然而在(4)条中，说了一句“...不用于确定预热要求“

和各位大神讨论一下，假设现在有P-No.1材料的直径26mm拉撑焊接在16mm厚度的管板上，该处是否需要做热处理？

我先说下自己的观点：该处需要做热处理。理由：按标准前后逻辑，前面明确了要做热处理，如果有例外应在前面PW-19.7就说了。另外拉撑焊接处的确有应力集中。PW-39-1注释的（4）条，给我整懵了，突然冒出来个预热要求，不理解.

欢迎各位论坛里的大家说说您的理解，新人报道帖，感谢。

卫衣~~~

如果焊接已经按照PW-19进行，则撑杆尺寸不作为是否做焊后热处理的依据；
个人理解，欢迎讨论