Sharing China-Made with Global Customers
Sharing China-Made with Global Customers
High-frequency straight seam welded pipe technology relies on precise control of various process parameters to achieve optimal product quality, production efficiency, and unit capacity.
The welding power dictates the crucial heat input during the welding process. Insufficient heat input leads to cold welding, where the heated strip's edge fails to reach the necessary welding temperature, resulting in fusion defects. Conversely, excessive heat input can cause overheating, leading to weld cracking under stress. Factors such as strip edge quality further influence heat input, with burrs exacerbating ignition issues and compromising welding power. The ramifications of inadequate or excessive heat input manifest in various defects, from failed tests to pipe leakage during hydraulic testing.
Welding pressure plays a pivotal role in the welding process, facilitating the formation of the weld seam by combining metal atoms at the strip edge. Optimal pressure ensures proper fusion and expulsion of metal oxides, enhancing weld strength and toughness. Inadequate pressure results in unfused edges and weakened welds prone to cracking, while excessive pressure leads to extrusion defects such as burrs and lap welding. Monitoring pressure through diameter changes and burr inspection is crucial for maintaining weld quality. Controlling pressure ensures symmetrical weld streamlines and optimal burr size, contributing to defect-free welds.
Welding speed directly influences heating, deformation, and crystallization rates during the welding process. Higher speeds correlate with improved welding quality, as shorter heating times narrow the heat-affected zone and reduce oxide formation. Conversely, slower speeds widen the heating zone and exacerbate burr formation, complicating weld quality. Selecting the appropriate welding speed balances input heat, edge quality, and external factors like magnetic resistance and opening angle, crucial for defect prevention. Maximizing welding speed within equipment and capacity constraints optimizes production efficiency and product quality.
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