Q235B LSAW Steel Pipe DN600

1. Material adaptation: Can Q235B stably bear DN600 working conditions?

It can bear stably. Q235B, as a common carbon structural steel, has a yield strength of ≥235MPa, a tensile strength of 370-500MPa, an impact energy of ≥27J at room temperature at 20℃ and a carbon content of ≤0.20%, which can stably withstand the pressure of 12-14MPa and meet the medium and low pressure requirements of DN600. The material has excellent plasticity and toughness, outstanding welding performance, carbon equivalent controlled below 0.3%, and can meet the welding requirements of LSAW without complicated preheating process. The raw materials are easily available and the cost is low, which is more than 20% lower than that of Q355B pipes with the same specification, and it is suitable for multi-media transportation such as water and natural gas.

2. Specification and technology: How to balance large-scale transportation and structural stability?

Compared with DN550, the transportation efficiency of DN600 is improved by 10%, which can meet the large-scale demand of centralized energy supply and industrial main transportation in large areas and avoid the high cost and construction pressure of larger pipe diameter. LSAW longitudinal submerged arc welding technology is adopted, and JCOE precision forming technology is used. The weld strength is close to the base metal, and the stress distribution is uniform. After forming, the residual stress is eliminated by quenching and tempering treatment, and the outer diameter tolerance is controlled within 0.6%, which is suitable for the common wall thickness of 8-14mm, ensuring the long-term structural stability of various laying methods such as underground and open air.

3. Core significance: What support does it have for the scale upgrading of the project?

Its core significance lies in breaking the dilemma of "large diameter will lead to high cost" and providing an economical and feasible solution for the large-scale upgrading of the project. Widely used in urban water supply and drainage trunk pipes, large-scale central heating pipe networks, industrial park main transportation pipelines and large-scale water conservancy irrigation projects, it can be used for a long time with simple anti-corrosion treatment, which greatly reduces the construction cost and maintenance cost, ensures the safety and stability of transportation, and helps medium-sized projects to make a smooth transition to large-scale projects.

4. Competitive advantage: Why did it become the best choice for transitional projects?

Compared with Q355B pipes with the same specification, the cost is lower and it is suitable for the transition scene without high pressure demand. Compared with spiral welded pipe, straight seam structure has more uniform stress and lower leakage risk; Seamless steel pipe, high mass production efficiency and affordable price. Its adaptability and economy perfectly match the engineering demand of medium-sized to large-sized transition, and it becomes the preferred conveying pipe for this kind of engineering, providing strong support for the large-scale development of the industry.