Stainless Steel U Tubes Manufacturer and Supplier Thailand
Stainless Steel U tube is a curved tube made from high-quality stainless steel, commonly used in heat exchangers, boilers, and other industrial applications. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, is a trusted manufacturer and exporter with years of expertise in producing high-performance stainless steel U tubes. At Thaida, We offer various types, sizes, schedules, and finishes to suit custom industrial applications. Our U tubes are known for their excellent resistance to high temperatures, severe chemicals, and corrosion. Every tube is subjected to stringent quality checks to meet international standards and is fully prepared for export to global markets, ensuring reliable performance and durability.
Product Introduction : Stainless Steel U Tubes
Stainless steel U tubes are essential components in heat transfer equipment, particularly in heat exchangers, offering high performance and reliability. Available in austenitic stainless steel, duplex, and super duplex stainless steel. Stainless steel U-Bend tube range can be customized with varied bending radii to suit specific design needs, ensuring optimal fit and function. These tubes are manufactured to meet strict tolerances and quality standards including compliance with ASTM A213. Tubes undergo in-house heat treatment and stress-relieving after bending to enhance their durability and prevent cracking. These ultra-long stainless steel U tubes are ideal for critical applications requiring efficient heat transfer.
Advantages of Stainless Steel U Tubes
Stainless steel U tubes offer benefits such as high performance, longevity, minimal maintenance etc which make them ideal for heat transfer systems.
Corrosion Resistance
High Precision and Smoothness
Durability and Strength
Wide Range of Applications
Reduced Maintenance
Why Choose Thaida for Your Stainless Steel U Tubes?
Competitive Pricing
Global Exports Expertise
Large Inventory & Fast Dispatch
Custom Sizes & Finishes
Industry Certifications & Compliance
Advanced Production Technology
After-Sales Support, Service- Technical Support
In-House Testing & Full Traceability
Stainless Steel U Tubes Specifications
The detailed stainless steel U tubes specifications outline material, dimensions, length, and standards.
| Specification | Details |
|---|---|
| SS U Tube Size | 6.35 mm OD to 273 mm OD |
| SS U Tubing Outside Diameter | 9.52 mm to 50.80 mm |
| SS U Tubing Thickness | 0.7 mm to 3.68 mm |
| SS U Tube Length | As per customer requirement, maximum up to 22 meters long |
| SS U Tube Standards | ASTM A213, ASME SA213 |
| SS U Tube Grades | TP 304, TP 304L, TP 316, TP 316L, TP 321, TP 321H, TP 347, TP 347H, TP 202, TP 409, TP 409L, TP 410, TP 430Ti, TP 439 |
| SS U Tubing Type | Seamless Tubes, Welded Tubes |
| SS U Tubing Finishing | Mechanical polished with grits 80, 120, 240, 320, 400, 600 and mirror polished |
Types of Stainless Steel U Tubes
Stainless Steel U Tubes types include multiple variants tailored for specific industrial applications. Each type is engineered to meet distinct performance and durability requirements.
Austenitic Stainless Steel U Tubes
Austenitic Stainless Steel U Tubes are the most widely used due to their excellent corrosion resistance, high ductility, and superior mechanical strength.
Heat Exchanger Stainless Steel U Tubes
These U tubes are specifically designed for use in shell and tube heat exchangers. They offer reliable thermal conductivity, pressure resistance, and longevity, making them essential in oil refineries, petrochemical plants, and HVAC systems.
Stainless Steel Condenser U Tubes
Condenser U tubes are used in systems where steam or gas is condensed into liquid. With high resistance to thermal fatigue and corrosion.
Superheater U Tubes Condenser U Tubes
Superheater U Tubes are built to withstand extreme temperatures and pressures in steam-generating units. These tubes enhance thermal efficiency and are crucial in boilers, thermal power plants, and high-pressure heat exchange systems.
Stainless Steel U Tubes Mechanical Properties
Stainless Steel U Tubes Mechanical Properties
| Grade | Properties | ||
|---|---|---|---|
| Tensile Stress ≥ MPa | Yield Strength ≥ MPa | Elongation ≥ % | |
| T12 | 415 | 220 | 30 |
| TP304 | 515 | 205 | 35 |
| TP304L | 485 | 170 | 35 |
| TP316 | 515 | 205 | 35 |
| TP316L | 485 | 170 | 35 |
| TP317 | 515 | 205 | 35 |
| TP317L | 515 | 205 | 35 |
| TP321 | 515 | 205 | 35 |
Chemical Composition of Stainless Steel U Tubes
Chemical Composition of Stainless Steel U Tubes
The stainless steel U tubes chemical composition table highlights available ss grades and their percentage of elements such as chromium, nickel, carbon, and manganese levels.
| Elem-Ent | Grade | TP304 | TP304L | TP304LN | TP316 | TP316L | TP316LN | TP XM-29 | TP 304N | TP 316N |
|---|---|---|---|---|---|---|---|---|---|---|
| % | UNS | S30400 | S30403 | S30453 | S31600 | S31603 | S31653 | S24000 | S30451 | S31651 |
| C, Max | 0.08 | 0.035 | 0.035 | 0.08 | 0.035 | 0.035 | 0.060 | 0.08 | 0.08 | |
| Mn, Max | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 11.50-14.50 | 2.00 | 2.00 | |
| Ph, Max | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | 0.060 | 0.040 | 0.040 | |
| S, Max | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | |
| Si, Max | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 1.00 | 0.75 | 0.75 | |
| Ni | 8.00-11.00 | 8.00-13.00 | 8.00-13.00 | 10.00-14.00 | 10.00-15.00 | 10.00-15.00 | 2.25-3.75 | 8.00-1.00 | 10.00-14.00 | |
| Cr | 18.00-20.00 | 18.00-20.00 | 18.00-20.00 | 16.00-18.00 | 16.00-18.00 | 16.00-18.00 | 17.00-19.00 | 18.00-20.00 | 16.00-18.00 | |
| Mo | – | – | – | 2.00-3.00 | 2.00-3.00 | 2.00-3.00 | – | – | 2.00-3.00 | |
| N | – | – | 0.10-0.16 | – | – | 0.10-0.16 | 0.20-0.40 | 0.10-0.16 | 0.10-0.16 |
Heat Treatment of Stainless Steel U Tubes
Heat Treatment of Stainless Steel U Tubes
| Leg Length, Ft (M) | Plus Tolerance, In (Mm) |
|---|---|
| <= 20 (6) | 1/8 (3.2) |
| >20(6), <=30(9) | 5/32 (4.0) |
| >30 (9), <=40 (12.2) | 3/16 (4.8) |
| Tube OD, In, (Mm) | Tolerance, In, (Mm) |
|---|---|
| <=5.8 (15.9) | 0.010 (0.25) |
| >5.8 (15.9), <=1 (25.4) | 0.016 (0.4) |
Dimensional Tolerances of Stainless Steel U Tubes
| Standard | SIZES OD (INCHES) | Tolerances Chart | |||
|---|---|---|---|---|---|
| O.D. | Wall Thickness | ||||
| PLUS (+) | MINUS (−) | PLUS (+) | MINUS (−) | ||
| ASTM-A-213 | Under 1.000 | .004″ | .004″ | 20% | 0% |
| ASME-SA-213 | 1.000 to 1.500 | .006″ | .005″ | 20% | 0% |
| Cold Finished Seamless | 1.501 to 1.999 | .008″ | .008″ | 22% | 0% |
| Heat Exchanger Tubes | 2.000 to 2.499 | .010″ | .010″ | 22% | 0% |
| Minimum Wall | 2.500 to 2.999 | .012″ | .012″ | 22% | 0% |
| 3.000 to 4.000 | .015″ | .015″ | 22% | 0% | |
| 4.001 to 5.000 | .015″ | .025″ | 22% | 0% | |
Stainless Steel U Tubes Manufacturing Process
Following are the 5 steps involved in the stainless steel U tubes manufacturing process to achieve high-quality output.
1. Raw Material Selection
High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.
2. Tubes Formation
The selected raw material is formed into pipes using seamless extrusion methods, depending on the application.
3. Heat Treatment
Tubes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.
4. Cold Working and Finishing
After heat treatment, pipes are cold-worked for better surface finish, dimensional accuracy and improved strength.
5. Quality Control and Testing
Every pipe is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.
Applications of Stainless Steel U Tubes
Stainless steel U tubes are widely used in heat exchangers across power plants, refineries, and chemical industries. In power generation, they play a key role in steam condensers and boiler systems. Refineries use them in tubular heat exchangers for fluid heating and cooling. Their U-shape allows compact design, while withstanding high pressure and temperature. These tubes are preferred for their durability and performance in thermal systems.
Aerospace & Defense
Water and Wastewater Treatment
Chemical and Petrochemical Industry
Construction and Architecture
Food and Beverage Industry
Marine & Shipbuilding
Oil and Gas Industry
Pharmaceutical & Biotechnology
Power Generation & Heat Exchange
FAQ's
Can Stainless Steel U Tubes handle high-temperature applications?
Can Stainless Steel U Tubes handle high-temperature applications?
Yes, stainless steel U-tubes are suitable for high-temperature applications due to their excellent heat resistance and strength. The choice of grade depends on the operating temperature and environment, grades like 310 and 310S perform well above 1000°C (1832°F), while 316 is effective up to 870°C (1600°F). These tubes are widely used in power generation and petrochemical industries, where they must withstand both high pressure and corrosion.
What industries benefit most from Stainless Steel U Tubes?
What industries benefit most from Stainless Steel U Tubes?
Stainless steel U-tubes are widely used across industries such as oil and gas, chemical and petrochemical, and power generation for their ability to handle high pressure, temperature, and corrosion. It is also used in the food, beverage, and pharmaceutical sectors for hygienic and sanitary processing. Additionally, water treatment, construction, and aerospace industries benefit from their durability, strength, and resistance to harsh environments.
What are the main advantages of using Stainless Steel U Tubes in heat exchangers?
What are the main advantages of using Stainless Steel U Tubes in heat exchangers?
Stainless steel U-tubes offer excellent durability, corrosion resistance, and high thermal efficiency, making them ideal for heat exchangers. Their U-shaped design saves space and enhances heat transfer, while the material’s strength allows them to withstand high pressures and temperatures. They also provide hygienic, low-maintenance performance, suitable for industries like food processing, pharmaceuticals, and power generation.
Can Thaida supply customized Stainless Steel U Tubes?
Can Thaida supply customized Stainless Steel U Tubes?
Yes, Thaida can supply customized stainless steel U-tubes tailored to specific project requirements. We offer various grades, sizes, bend radii, and lengths to meet different industrial needs. Each tube is manufactured with precision to ensure high performance, durability, and compatibility with heat exchangers and other applications.
What is the lifespan of a stainless steel seamless u tubes?
What is the lifespan of a stainless steel seamless u tubes?
The lifespan of stainless steel seamless U-tubes typically ranges from 20 to over 100 years, depending on the grade, application, and environment. In highly corrosive industrial settings, they last around 20–50 years, while in less aggressive conditions such as water supply systems, their service life can extend to 50–100 years or more with proper maintenance.
When to use stainless steel seamless u tubes?
When to use stainless steel seamless u tubes?
Stainless steel seamless U-tubes are used in applications that demand high-pressure resistance, heat stability, and efficient fluid or heat transfer. It is widely employed in heat exchangers, boilers, and superheaters across power generation, oil and gas, and chemical industries. Their seamless design ensures strength, durability, and corrosion resistance, making it ideal for critical and high-performance systems.