LSAW steel pipe and SSAW steel pipe each have their own advantages and disadvantages, as follows:
Advantages and Disadvantages of LSAW Steel Pipe
Advantages:
High production efficiency: The manufacturing process of LSAW pipe is relatively simple, with high production efficiency and low cost, which is suitable for mass production12.
Surface finish: LSAW pipe has a smooth surface, uniform wall thickness, stable and reliable welding quality, and can effectively prevent leakage13.
Widely used: Due to its high production efficiency and relatively low cost, LSAW pipe is widely used in low-pressure transmission systems, building structure support, water supply and drainage systems, etc., especially in urban water supply, heating and other livelihood projects due to its convenient installation and low maintenance cost23. Disadvantages:
Low pressure bearing capacity: Under the same wall thickness, the pressure bearing capacity of the straight seam submerged arc welded pipe is not as good as that of the spiral submerged arc welded pipe, especially in high pressure, high temperature or corrosive environment, the weld quality requirements are extremely high, once defects occur, it will directly affect the safe operation of the pipeline2.
Single pipe length is short: The straight seam submerged arc welded pipe generally does not exceed 6 meters, while the single pipe length of the spiral submerged arc welded pipe can exceed 12 meters1.
Advantages and disadvantages of spiral submerged arc welded steel pipes Advantages
Strong pressure bearing capacity: The weld of the spiral submerged arc welded pipe is spiral, which can more effectively disperse stress and improve the overall bearing capacity. It is particularly suitable for large-diameter and high-pressure transmission systems2.
High welding quality: The weld length of the spiral submerged arc welded pipe is relatively long, and the requirements for welding technology are also higher. It can withstand higher internal pressure, and under the same wall thickness, it can withstand higher internal pressure2.
Widely used: Due to its excellent pressure bearing capacity and corrosion resistance, spiral submerged arc welded pipes are more suitable for long-distance, large-diameter, high-pressure transmission pipelines such as oil and natural gas, and also play an important role in marine engineering, chemical industry, power and other industries2.
Disadvantages:
High cost: The manufacturing cost of spiral submerged arc welded pipes is relatively high. Although the economic benefits brought by its long-term stability and safety are significant, its initial investment is relatively large12.
Rough surface: The surface of spiral submerged arc welded pipes is relatively rough, and the wall thickness is uneven1.
