1. Power Source: Use a vertical external characteristic power source with direct current (DC) and positive polarity (electrode connected to the negative terminal). 2. Material Suitability: Ideal for welding thin plates under 6mm, providing aesthetically pleasing weld seams with minimal deformation. 3. Shielding Gas: Use 99.99% pure argon. Flow rates vary based on current: 8-10 L/min for 50-150A, 12-15 L/min for 150-250A.

Porosity in the weld seam of large-diameter spiral pipes not only affects the weld tightness, leading to potential leaks, but also serves as a corrosion initiation point, significantly reducing the weld strength and toughness. Factors contributing to porosity include moisture in the flux, contaminants, oxidation, iron filings, welding composition, flux coverage, steel plate surface quality, edge preparation, welding technique, and pipe forming technology.

Spiral steel pipe is a strip steel coil as raw materials, regular temperature extrusion, according to the spiral shape of the bending molding, automatic double-wire double-sided submerged arc welding process for the inner seam and outer seam welded spiral seam steel pipe. The raw materials are strip coil, welding wire and flux.

Precision stainless steel welded pipe is a type of straight-seam welded pipe known for its precise surface or dimensions. It is made by extruding steel strips through molds and then welding them automatically or manually. This pipe is simple to size, highly efficient to produce, and comes in various specifications, making it commonly used in machinery, furniture, sanitary ware, appliances, and engineering components. Different applications require varying degrees of precision.

1. Uniform Deformation: During forming, the steel plate deforms evenly with minimal residual stress, reducing the likelihood of surface scratches. 2. Size Flexibility: Spiral steel pipes offer greater flexibility in diameter and wall thickness dimensions. 3. Advanced Welding Process: Utilizes an advanced double-sided submerged arc welding process, allowing for optimal welding positioning. 4. Quality Assurance: Undergoes 100% quality inspection with strict monitoring to ensure product quality.

Straight seam steel pipes can be classified into two main welding techniques: Electric Resistance Welding (ERW) and Submerged Arc Welding (SAW). ERW pipes are further divided into high-frequency (HF), medium-frequency (MF), and low-frequency (LF) welded pipes. SAW pipes, also known as double-sided submerged arc welded pipes or Longitudinally Submerged Arc Welding (LSAW) pipes, use the submerged arc welding process for production.

Generation of Residual Stress After mechanical processing, the surface layer of a workpiece typically contains residual stress. Residual compressive stress can enhance the wear resistance and fatigue strength of the surface under tensile stress, whereas residual tensile stress has the opposite effect. If the tensile stress exceeds the fatigue strength limit of the workpiece material, cracks may develop on the surface, accelerating damage.

Square tubes are made of steel. If they are exposed to rain, they will definitely rust. Therefore, they should not be exposed to rain when stored.

Anti-corrosion steel pipes play important and different roles in people's daily lives. Anti-corrosion steel pipes generally refer to the use of special processes to treat ordinary steel pipes, so that the steel pipes have certain anti-corrosion capabilities.

Since spiral steel pipes are piled outdoors and most of the large-diameter spiral pipes are buried underground when in use, they are prone to corrosion and rust. In order to ensure the smooth flow of the pipeline, the spiral steel pipe must have strong corrosion resistance.