1. Applications of large-diameter straight seam welded steel pipes can be categorized as oil well pipes (casing, tubing, and drill pipe, etc.), pipeline pipes, boiler pipes, mechanical structure pipes, hydraulic support pipes, gas cylinder pipes, geological pipes, chemical pipes (high-pressure fertilizer pipes, petroleum cracking pipes), and marine pipes.
2. For large-diameter straight seam welded steel pipes, thicker walls are more cost-effective and efficient; thinner walls significantly increase processing costs.
3. The manufacturing process of large-diameter straight seam welded steel pipes inherently limits their performance. Compared to seamless steel pipes with low precision, large-diameter straight seam welded steel pipes suffer from uneven wall thickness, low-brightness appearance, high costs associated with fixed lengths, and pitting corrosion, with black spots difficult to remove.
4. Inspection and processing must be done offline. Therefore, large-diameter straight seam welded steel pipes demonstrate their superiority under higher pressure, higher strength, and mechanical structural requirements.
5. The corrosion resistance of large-diameter straight seam welded steel pipes depends on the alloy components. Chromium is a fundamental component of corrosion-resistant stainless steel, comprising approximately 12% of the steel. Chromium reacts with oxygen in the corrosive medium to form a thin oxide film (passivation film) matrix on the steel surface, preventing further corrosion of the steel pipe.
Post time: Dec-12-2025