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4.水平固定和垂直固定排管的焊接方法在实际生产中,特别是在电站锅炉的施工中,经常遇到水平固定排管和垂直固定排管的焊接。管与管之间的最小距离只有12mm,无法用正常方法施焊,这就要采取特殊措施。 (1)水平固定排管的焊接方法水平固定排管打底焊道分四段进行焊接,可以有两种焊接方法。一种是从最难焊的部位,也就是时钟位置3和9处始焊,并把内填丝法和外填丝法结合起来使用,其焊接方法和焊接顺序为:左手握焊枪,右手拿焊丝,在时钟位置9处始焊,采用内填丝法焊接,电弧由
4. Horizontal fixed and vertical fixed pipe welding method In the actual production, especially in the construction of power plant boilers, often encountered horizontal fixed row of vertical and vertical pipe welding. The minimum distance between pipe and pipe is only 12mm, which can not be welded by normal method, so special measures should be taken. (1) Horizontal fixed pipe welding method Horizontal fixed pipe backing weld is divided into four sections for welding, there are two kinds of welding methods. One is from the most difficult to weld parts, that is, the clock position 3 and 9 at the beginning of welding, and wire filling method and wire method used in combination, the welding method and welding sequence: left hand gun, the right hand Wire, at the clock location 9 at the beginning of welding, welding method using wire filling, arc from