scavenging air pipe-welding process

Butt welding of plates of different thickness

 In the welding inspection process of sweeping pipe, butt welding of plates of different thickness is often required at various positions.  In order to facilitate welding, the factory workshop of the first production changes the form, size and Angle of groove at will, and does not meet the requirements of welding process evaluation.  If found, it should be stopped immediately and required for rectification.   And at the beginning of the inspection work in the future, remind the relevant personnel of the factory to construct according to the requirements of the drawings, so as to avoid the instability of welding quality.   Before welding, thin plate is machined into K groove and thick plate must be joint ready.   In this case, it is in accordance with article 8.1.4.2, Chapter 8, Chapter 3, Material and Welding Specification of CCS.  When the thickness difference between two components of different thickness is greater than or equal to 4 mm, the edge of the thick plate should be cut to make a uniform transition

 The general design drawings do not clearly indicate the need to whiten the thick plate edge.  The workshop staff may ignore this problem in accordance with the drawings.  Therefore, the CCS specification provisions should be clearly mastered by the production factory and implemented as a whole.