High-strength steel plate steel pipe pile butt joint circumferential weld welding method
A high-strength steel plate and welding method technology, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of not giving groove size, welding preheating welding sequence, welding material weld seam hammering, weld seam heat treatment technology Measures, can not effectively prevent cold cracks and other problems, to achieve the effect of improving the pass rate of flaw detection, avoiding welding cold cracks, and ensuring the quality of welds
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[0034] Embodiments of the present invention provide a method for butt girth weld welding of high-strength steel pipe piles. The method may include:
[0035] Before welding, grind the groove surface and 20-30 mm on both sides of the weld to reveal the metallic luster. An X-shaped groove is set on the opposite end face of the butt girth weld of the 500MPa grade extra-thick steel pipe pile 1; the depth L1 of the inner groove 11 located on the inner side of the steel pipe pile is greater than the outer groove located on the outside of the steel pipe pile. 12 Depth L2, so that the X-shaped groove forms an asymmetric form in the inner and outer directions of the steel pipe pile; the groove angle θ of the X-shaped groove is 35-40°, and the root gap a is 0-3 mm; further, the ratio of the inner groove depth L1 to the outer groove depth L2 is 11:7.
[0036] The steel pipe pile is preheated before welding, and the temperature of the preheating is 150-200°C; The prehea...
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