Views: 0 Author: J-VALVES Publish Time: 2024-04-25 Origin: Site
I. Key Points of Welding Process
(I) Welding Materials
· Valve Body Material: Commonly used carbon steel or low-alloy steel, such as ASTM A105.
· Welding Wire and Flux: The welding wire should match the valve body material, and the flux should have good slag-releasing property to ensure the weld quality.
(II) Welding Parameters
· Current and Voltage: Adjust according to the material thickness and welding wire diameter to avoid overheating.
· Welding Speed: Keep it moderate to ensure fusion and reduce heat input.
(III) Welding Process
· Pre-heating and Inter-pass Temperature: Pre-heat to 75-100°C, and the inter-pass temperature should not exceed 150°C.
· Welding Sequence: Conduct multi-layer and multi-pass welding, starting from the middle to both ends.
