Seamless Stainless Steel U-tube is a specific type of heat exchanger tube that is bent into a"U"shape after the manufacturing process. It is crafted from a single, solid billet of stainless steel and, like other seamless tubes, has no weld joint. This seamless construction is crucial for maintaining structural integrity and reliability, especially in high-stress and corrosive environments. The unique U-shape allows for thermal expansion and contraction, making it ideal for shell and tube heat exchangers. It enables a single-pass fluid flow on the shell side and a multi-pass flow on the tube side, maximizing heat exchange efficiency and reducing the overall footprint of the heat exchanger.① STANDARD: ASTM A213② OD RANGE : 6-50.8MM③ THICKNESS RANGE: 0.5-9MM④ U-BEND & STRAIGHT
Seamless Stainless Steel U-tube is a specific type of heat exchanger tube that is bent into a"U"shape after the manufacturing process. It is crafted from a single, solid billet of stainless steel and, like other seamless tubes, has no weld joint. This seamless construction is crucial for maintaining structural integrity and reliability, especially in high-stress and corrosive environments. The unique U-shape allows for thermal expansion and contraction, making it ideal for shell and tube heat exchangers. It enables a single-pass fluid flow on the shell side and a multi-pass flow on the tube side, maximizing heat exchange efficiency and reducing the overall footprint of the heat exchanger.
Seamless Stainless Steel U-tubes offer a unique combination of benefits that make them invaluable in demanding heat transfer applications:
Superior Heat Transfer Efficiency: The U-shape design allows for multiple passes within the same shell, significantly increasing the effective surface area for heat exchange and improving thermal efficiency.
High Pressure and Temperature Tolerance: The seamless construction and robust material allow the tube to safely handle high internal pressures and extreme temperatures without the risk of rupture, ensuring operational safety.
Exceptional Corrosion Resistance: Stainless steel's inherent properties provide outstanding resistance to oxidation, pitting, and crevice corrosion, ensuring a long service life even in harsh chemical environments.
Enhanced Durability: The absence of a weld seam eliminates a potential weak point, making the tube more durable and reliable under mechanical stress and vibration.
Reduced Footprint: The compact U-tube design allows for a more efficient and space-saving heat exchanger configuration compared to straight-tube designs with similar heat exchange capacity.
Heat exchanger is a device used to transfer heat between a solid object and a fluid, or between two or more fluids at different temperatures, transfer heating from higher temperature fluid to lower temperature object to make fluid temperature to specified requirement, for stainless steel grades, there are shell and tube heat exchanger, plate heat exchangers, plate and shell heat exchanger and other heat exchanger, tube heat exchanger consists of a number of tubes inside bundle and sheet, widely used in many industries.
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American Standard |
Austenitic Steel: |
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TP304, TP304L, TP304H, TP304N, TP310S, TP316, TP316L, TP316Ti, TP316H, TP317, TP317L, TP321, TP321H, TP347, TP347H,904L… |
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Duplex Steel: |
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S32101, S32205, S31803, S32304, S32750, S32760 |
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Others:TP405,TP409, TP410, TP430, TP439,... |
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European Standard |
1.4301, 1.4307, 1.4948, 1.4541,1.4878, 1.4550, 1.4401, 1.4404, 1.4571, 1.4438, 1.4841, 1.4845, 1.4539, 1.4162, 1.4462, 1.4362, 1.4410, 1.4501 |
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Size Tolerance |
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Tube Kinds |
SA213 OD(D) |
SA213 Thickness(S) |
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OD(mm) |
OD Tolerance(mm) |
OD(mm) |
Thickness Tolerance(mm) |
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Hot Rolled |
=101.6 |
+0.4~-0.8 |
76~168.3 |
+28%~0 |
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>101.6~168.3 |
+0.4~-1.2 |
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Cold Drawn |
<25.4 |
0.1 |
=38.1 |
+20%~0 |
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25.4~38.1 |
0.15 |
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>38.1~<50.8 |
0.2 |
>38.1 |
+22%~0 |
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50.8~<63.5 |
0.25 |
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63.5~<76.2 |
0.3 |
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76.2~101.6 |
0.38 |
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Production |
Outside Diameter |
Wall Thickness |
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Heat Exchanger Tube |
6.00mm -203.2mm |
0.5mm - 21mm |
Solution Annealed & Pickled/Bright Annealed.
With a strong focus on precision and industry-leading standards, we ensure each TP314 Seamless Stainless Steel Pipe meets the highest performance. We utilize advanced manufacturing processes, including strict quality checks and annealing techniques, to guarantee durability and reliability. We have the largest inventory of providing quick access to a range of sizes and specifications for diverse industrial applications. With a commitment to excellence, our tubes are manufactured in accordance with international certifications, ensuring compliance with global standards. These seamless tubes are commonly used in heat exchangers, high-temperature furnaces, and other critical applications where corrosion resistance and high strength are essential. Our UNS S31400 tubes are also equivalent to global standards, ensuring compatibility across various markets.① STANDARD: ASTM A312/EN10216-5/ASTM A249/ ASTM A269/ GOST 9940 /GOST 9941...② OD RANGE : 6-1016 MM③ THICKNESS RANGE: 1-65 MM
TP321 Seamless Stainless Steel Tube is a titanium-stabilized austenitic tube known for their excellent resistance to intergranular corrosion and superior high-temperature strength. These tubes are ideal for applications requiring stability at elevated temperatures, such as in heat exchangers, aerospace systems, and petrochemical industries. ① STANDARD: ASTM A213/ EN10216-5/ASTM A249/ ASTM A269/ GOST 9940 /GOST 9941...② OD RANGE : 6-257MM③ THICKNESS RANGE: 1-35 MM
TP316LN/S31653/1.4429 Seamless Stainless Steel Pipe is a high-performance tubing product known for its excellent corrosion resistance, superior strength, and durability under extreme conditions. ① STANDARD: EN10216-5/ ASTM A312/ ASTM A249/ ASTM A269/ GOST 9940 /GOST 9941...② OD RANGE : 6-1016 MM③ THICKNESS RANGE: 1-65 MM
253MA Seamless Stainless Steel Pipe is a tube which features seamless construction, excellent heat and corrosion resistance, and long-lasting durability. ① STANDARD: EN10216-5/ ASTM A312/ ASTM A249/ ASTM A269/EN10216-5/ GOST 9940 /GOST 9941...② OD RANGE : 6-706MM③ THICKNESS RANGE: 1-65 MM
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