Our 201, 202, 301, 304, 304L, 321, 316, 316L Welded Stainless Steel Pipes offer a range of outstanding features. 201 and 202 pipes are cost - effective with good corrosion resistance, suitable for general applications like food service and automotive parts. 301 pipes, with high strength, are great for springs and architectural uses.
304 pipes ensure excellent all - around corrosion resistance, while 304L, with lower carbon, has improved weldability. 321 pipes, stabilized with titanium, resist high - temperatures well. 316 and 316L pipes, containing molybdenum, offer superior resistance to pitting and crevice corrosion. All are precisely welded, with smooth inner walls for efficient fluid flow, and are available in various sizes to meet diverse industrial demands.
Excellent Corrosion Resistance: One of the core advantages. The chromium (Cr) element in stainless steel forms a dense chromium oxide (Cr₂O₃) passive film on the surface, which can resist corrosion from air, water, and most weak acid - alkali media (such as civil tap water, food - grade fluids, and mild chemical solutions). If elements like nickel (Ni) and molybdenum (Mo) are present (e.g., 316L), the corrosion resistance to chloride ions (such as seawater, brine) and organic acids can be further improved.
Good Mechanical Properties: It has moderate strength (tensile strength is usually ≥ 485MPa) and toughness, can withstand a certain amount of pressure (depending on the wall thickness and material; for example, 304 welded pipes are often used in low - pressure transportation scenarios of 1.0 - 2.0MPa), and at the same time has excellent low - temperature toughness. Most models are not prone to brittle fracture even at - 196℃ (liquid nitrogen temperature).
High - temperature/Low - temperature Stability: It can adapt to a wide temperature range depending on the material. 304/304L can withstand high temperatures below 430℃, while 321 (containing Ti) and 347 (containing Nb) can withstand high temperatures above 600℃ (with intergranular corrosion resistance). It also maintains structural stability in low - temperature scenarios (such as cold chain pipelines) without significant performance degradation.
Easy Cleaning and Hygiene: It has a smooth surface (usually BA - Bright Annealed or AP - Acid Pickled surface), which is not easy to adhere to dirt and bacteria. Additionally, it is resistant to corrosion from cleaning agents, meeting the hygiene standards of the food, pharmaceutical, drinking water, and other fields (e.g., 304L and 316L are often used in food processing pipelines).
High Specification Flexibility: By adjusting the width of the steel plate and the forming die, pipes with different outer diameters (usually from 12.7mm to over 2000mm) and different wall thicknesses (0.5mm - 20mm) can be produced. It is particularly suitable for the mass production of large - diameter (e.g., above DN500) and thin - walled (e.g., below 0.8mm) pipes, making up for the manufacturing difficulties of seamless pipes in the field of large - diameter/thin - walled pipes.
High Production Efficiency: Adopting a continuous forming + welding process, the production line has a high degree of automation (such as high - frequency welding production lines), and the daily output of a single line can reach thousands of meters, which is much higher than that of seamless pipes.
