Issues with longitudinal seam welding when coiling steel plates? !
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Steel plate coils made of material Q235B, with a thickness of 12 mm; the butt welds must meet RTII grade requirements. SMAW welding. May I ask what kind of groove is required? V-shaped or double V-shaped? How about the reel process? Are there any **standard specifications** for this weld?
Waiting for an answer; GB150 should have relevant regulations on this
The types and dimensions of welding joints shall comply with the provisions in HG/T20583-2011, unless otherwise specified in the drawings; the butt welds are of type DU4, while the welds between the nozzles and the shell are of type G2 (full penetration). The leg dimensions of fillet welds shall be determined based on the thickness of the thinner plate; the welding of flanges shall follow the provisions in the relevant standards； The figure shows the welding methods for GB150: Please select accordingly based on process and equipment requirements
Thank you! ! Are there any relevant regulations in GB150 regarding rolled plates? ? Such as spot welding, arc starting, etc.?
Read more about the manufacturing section in GB150.4
When rolling plates, the butt welds need to be spot-welded first. What should be noted when spot welding?
A V-shaped shape is sufficient: cutting the material – creating a groove – pre-bending – spot welding at the groove – further bending to achieve a circular shape – welding – non-destructive testing (NB/T47003)
Are there any requirements for spot welding at the groove? ? Can spot welding affect non-destructive testing?