STAINLESS STEEL WELDED TUBE
FROM RAW MATERIAL TO FINISHED TUBE PRODUCTS
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Stainless Steel Welded Tube Specification:
ASTM A249, ASTM A269, ASTM A554, ASTM B673, ASTM B674
Request a QuoteGrade: 304, 304L, 316L, 309/309S, 310/310S, 904L
Duplex 2205, Duplex2507
Outer Diameter: 6.0mm to 88.9mm
Wall thickness: 0.3mm to 2.0mm
Length: Standard 6000mm, but we can adjust based on customer’s requirement.
Heat Treatment: Inline bright annealing.
NDT: Hydrostatic, Pneumatic, E.T. U.T based on standard or customers’ requirements.
Stainless Steel Welded Tube Manufacturing Processes and Surface Treatments
Welded Tube Production: Roll Forming and Welding
Stainless steel welded tubes are manufactured by shaping flat sheets or strips of stainless steel into a tubular form and welding the edges together. The two most common methods for welding are TIG (Tungsten Inert Gas) welding and laser welding, depending on the application requirements.
Production Process:
1, Roll Forming: Stainless steel sheets are continuously rolled into a tube shape.
2, Welding: The edges are joined using high-precision welding techniques to ensure a strong seam.
3, Post-Welding Treatment: The weld seam is processed to match the rest of the tube's surface.
Key Features:
●Cost-effective compared to seamless tubes, especially for larger diameters.
●Excellent dimensional accuracy and uniform wall thickness.
●Suitable for a wide range of industries, including construction, food and beverage, and petrochemical applications.
Surface Treatment Methods:
AP (Annealing and Pickling):
After welding, the tubes undergo annealing to relieve stresses and improve ductility. The pickling process removes weld oxides, ensuring a uniform, corrosion-resistant surface.
BA (Bright Annealed Finish):
Bright annealing is conducted in a controlled atmosphere (usually hydrogen) to prevent oxidation during heat treatment. This results in a smooth, reflective finish ideal for aesthetic applications or environments requiring superior cleanliness.
EP (Electropolishing):
Used to achieve ultra-clean, smooth surfaces, electropolishing removes surface imperfections, enhances corrosion resistance, and creates a mirror-like finish. This is essential for applications in pharmaceuticals, semiconductors, and food processing.
APPLICATIONS OF STAINLESS STEEL WELDED TUBE
● Fluid and Gas Transport: Widely used in water supply, oil, and gas piping systems.
Request a Quote● Food and Beverage Industry: Ensures hygiene and corrosion resistance for food-grade tubing systems.
● Structural Applications: Offers strength and aesthetic appeal for architectural and construction uses.
● Heat Exchangers: Facilitates efficient heat transfer in HVAC systems.
● Chemical and Petrochemical: Suitable for corrosive environments requiring high-performance materials.
● Stainless steel welded tubes combine cost-effectiveness, versatility, and durability, making them an essential choice for diverse industries. Their ability to achieve high-quality finishes and consistent properties further broadens their range of applications.
FEATURES OF STAINLESS
304: 304 stainless steel is resistant to corrosion and high temperature, and has good processing performance, so it is widely used in industry, furniture decoration industry and food and medical industry.
316L: Compared with conventional chromium-nickel austenitic stainless steel such as 304 stainless steel, 316L has better resistance to general corrosion, pitting corrosion and crevice corrosion. 316L has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance.
309/309S: 309/309S stainless steel can withstand repeated heating below 980 °C, it has high high-temperature strength, oxidation resistance, and carburization resistance.
310/310S: 310/310S stainless steel is an austenitic chromium-nickel stainless steel, which has good oxidation resistance, corrosion resistance, high temperature resistance, and because of the higher percentage of chromium and nickel, it has much better creep strength and can continue to work at high temperatures,
310/310S: 310/310S stainless steel is an austenitic chromium-nickel stainless steel, which has good oxidation resistance, corrosion resistance, high temperature resistance, and because of the higher percentage of chromium and nickel, it has much better creep strength and can continue to work at high temperatures,
it also has good high temperature resistance. Due to the high content of Ni and Cr, it has good oxidation resistance, corrosion resistance, acid and alkali resistance, and high temperature resistance. The high temperature resistant steel pipe is specially used in the manufacture of electric furnace tubes and other occasions.
Duplex 2205: The yield strength of Duplex 2205 stainless steel is more than double that of ordinary austenitic stainless steel. This feature allows designers to reduce weight when designing products, making this alloy more price-competitive than 316, 317L. This alloy is especially suitable for use in the -50°F/+600°F temperature range.
Duplex 2507: Duplex 2507 is a ferritic-austenitic (duplex) stainless steel, which combines the most beneficial properties of many ferritic steels and austenitic steels. Due to the high content of chromium and molybdenum in this steel, it has extremely Good resistance to pitting corrosion, crevice corrosion and uniform corrosion. The dual-phase microstructure ensures that the steel has a high resistance to stress corrosion cracking, and its mechanical strength is also high.
Duplex 2205: The yield strength of Duplex 2205 stainless steel is more than double that of ordinary austenitic stainless steel. This feature allows designers to reduce weight when designing products, making this alloy more price-competitive than 316, 317L. This alloy is especially suitable for use in the -50°F/+600°F temperature range.
Duplex 2507: Duplex 2507 is a ferritic-austenitic (duplex) stainless steel, which combines the most beneficial properties of many ferritic steels and austenitic steels. Due to the high content of chromium and molybdenum in this steel, it has extremely Good resistance to pitting corrosion, crevice corrosion and uniform corrosion. The dual-phase microstructure ensures that the steel has a high resistance to stress corrosion cracking, and its mechanical strength is also high.
Standards:
Tube & tubing: ASTM A249, ASTM A269, ASTM 1554
Stainless Density:
0.286 lb/in3 (7.93g/cm3), 0.29 lb/in3 (7.98g/cm3)