How to weld seamless stainless steel elbows quickly and with high quality?
To achieve fast and high-quality welding of seamless stainless steel elbows, it is necessary to focus on gas protection, operational rhythm, and detail optimization.
1. Optimization preparation work
Reserve appropriate gaps: Reserve a 3.5-4mm gap before welding to ensure that the molten pool is fully filled and reduce shrinkage deformation.
Seal both ends of the pipeline: Use food grade sponge or tape to block the pipe opening to prevent internal oxidation (tape for short pipes, air holes for long pipes).
Clean the surface of the welding joint, remove oil stains and impurities, and avoid welding defects.
2. Precise control of gas protection
Sub gas flow regulation: Set the flow rate according to the pipe diameter (5-10 oxygen units for small pipes and 20 units for large pipes). If the flow rate is too small, it is prone to oxidation, and if it is too large, it will form vortices; After welding, the gas should be stopped 2-3 seconds later to ensure sufficient protection of the weld seam.
Test oxygen effect: Spot weld small points to the back to check the chromaticity. Silver white indicates no oxidation (blackening requires increased flow rate).
3. Efficient welding operation
Accurate landing point and angle: The welding rod is kept 90 degrees vertical, and the landing point is decisive and even, with slight swinging towards both sides of the molten pool to control heat distribution.
Arc interruption rhythm control: Observe the landing point when the molten pool is dark red to avoid overheating and deformation caused by continuous arc; For small pipe elbows, spot welding is preferred (two spot welding to reduce heat input).
Use baffles to fix the large pipe welds (such as spot welding in the 12 o’clock and 4 o’clock directions) to prevent shrinkage gaps.
4. Speed up post weld processing
Immediately polish and polish the interface after welding to improve sealing and aesthetics.
Regularly calibrate the equipment (such as setting the current to 55-70A) and test the sealing performance through pressure testing.
Following the above method, combined with practical adjustments, can significantly improve welding efficiency and quality.
How to weld seamless stainless steel elbows quickly and with high quality?
To achieve fast and high-quality welding of seamless stainless steel elbows, it is necessary to focus on gas protection, operational rhythm, and detail optimization.
1. Optimization preparation work
Reserve appropriate gaps: Reserve a 3.5-4mm gap before welding to ensure that the molten pool is fully filled and reduce shrinkage deformation.
Seal both ends of the pipeline: Use food grade sponge or tape to block the pipe opening to prevent internal oxidation (tape for short pipes, air holes for long pipes).
Clean the surface of the welding joint, remove oil stains and impurities, and avoid welding defects.
2. Precise control of gas protection
Sub gas flow regulation: Set the flow rate according to the pipe diameter (5-10 oxygen units for small pipes and 20 units for large pipes). If the flow rate is too small, it is prone to oxidation, and if it is too large, it will form vortices; After welding, the gas should be stopped 2-3 seconds later to ensure sufficient protection of the weld seam.
Test oxygen effect: Spot weld small points to the back to check the chromaticity. Silver white indicates no oxidation (blackening requires increased flow rate).
3. Efficient welding operation
Accurate landing point and angle: The welding rod is kept 90 degrees vertical, and the landing point is decisive and even, with slight swinging towards both sides of the molten pool to control heat distribution.
Arc interruption rhythm control: Observe the landing point when the molten pool is dark red to avoid overheating and deformation caused by continuous arc; For small pipe elbows, spot welding is preferred (two spot welding to reduce heat input).
Use baffles to fix the large pipe welds (such as spot welding in the 12 o’clock and 4 o’clock directions) to prevent shrinkage gaps.
4. Speed up post weld processing
Immediately polish and polish the interface after welding to improve sealing and aesthetics.
Regularly calibrate the equipment (such as setting the current to 55-70A) and test the sealing performance through pressure testing.
Following the above method, combined with practical adjustments, can significantly improve welding efficiency and quality.