Heat Exchanger U Tube Stainless Steel Seamless Pipe For Boiler And Heat Exchanger

ASTM A213 U-tube seamless stainless steel pipes are precision-manufactured for high-temperature boiler and heat-exchanger applications. Available in a variety of grades (TP304, TP304L, TP316, TP316L, TP321), they combine excellent corrosion resistance, high strength, and thermal stability. Typical sizes range from ⅛" to 5" OD (3.2 mm–127 mm) with wall thicknesses from 0.4 mm to 12.7 mm. Five comparable grades are summarized below with both their chemical compositions and mechanical properties. Conforming to major international standards (ASTM A213/ASME SA213, EN 10216-5, GOST 9940/9941-81, JIS G3459, GB/T 24791), these tubes find broad use in petrochemical, power generation, food processing, HVAC, and other industries.

Material

These tubes are produced from austenitic stainless steel alloys, offering a face-centered cubic (FCC) crystal structure that imparts:

• Non-magnetic behavior

• Outstanding formability and weldability

• High resistance to oxidation and most corrosive environments

Specifications

• Standard: ASTM A213 / ASME SA213 for seamless ferritic and austenitic boiler, superheater, and heat-exchanger tubes

• Size Range:

  • Outside diameter: ⅛" to 5" (3.2 mm–127 mm)

  • Wall thickness: 0.015"–0.500" (0.4 mm–12.7 mm)

• Forming: Hot-rolled, cold-drawn, surface-finished (bright annealed, pickled)

• Delivery Conditions: Annealed, stress-relieved, solution-annealed

Chemical Composition

Mechanical Performance

Main Characteristics

• Corrosion Resistance: Excellent against oxidizing and reducing acids, chloride environments

• High-Temperature Performance: Maintains strength and creep resistance up to ~800 °C

• Formability: Ready for bending into U-tubes with minimal cold work

• Weldability: No post-weld annealing required for thin sections (≤ 6 mm for TP304L)

• H-Grades: Variants such as TP304H, TP316H offer enhanced creep-rupture strength for severe duty

Execution Standards

• ASTM A213 / ASME SA213: Seamless ferritic & austenitic boiler, superheater, heat-exchanger tubes

• EN 10216-5: Seamless steel tubes for pressure purposes (austenitic stainless)

• GOST 9940-81 / 9941-81: Russian standard for seamless hot/cold deformed corrosion-resistant tubes

• JIS G3459: Japanese Industrial Standard for heat-resistant stainless steel tubes

• GB/T 24791: Chinese national standard for seamless stainless steel heat-exchanger tubes

Application Fields

These U-tube seamless pipes are widely used in:

• Power & Energy: Boiler tubes, superheater, reheater, steam generator U-tubes

• Petrochemical & Refining: Shell-and-tube heat exchangers, condensers, reboilers

• Chemical Processing: Reactor coils, transfer lines for corrosive fluids

• Food & Beverage: Pasteurizers, evaporators, CIP systems (TP304L)

• HVAC & Refrigeration: Chillers, evaporators, condensers

• Marine & Offshore: Heat-exchanger bundles in seawater-cooled systems

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Who We are ?

-------A professional steel pipes materials inventor, manufacturer and solution provider
Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of TORICH INTERNATIONAL LIMITED. The factories’ technicians are of great engineering experience in steel pipe industry for more than 20 years, which are in great command of production technology for Cold Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.

What products we do?

------- Invent and produce various Precision Steel Pipes

Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes

Bearing Steel Tubes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes

Honed Tubes

Hydraulic Cylinder Steel Tubes

Hydraulic Telescopic Cylinder Tubes
Seamless Structural Steel Pipes
Seamless Mechanical Steel Pipes
Seamless Alloy Steel Tubes & Pipes
Seamless Stainless Steel tubes
Welded Stainless Steel Tubes
Seamless Stainless Steel Tubes & Pipes
Welded Stainless Steel Tubes & Pipes
Seamless Carbon Steel Tubes & Pipes
Nickel Alloy Steel Tubes & Pipes

What TORICH do:
1. Producing Steel Tubes
2. Selling both on Domestic and International Market
3. Precisely Targeting Customers’ Requirement- Sourcing the right factory for right products for Customers

Products Application:
Oil Cylinders
Air Cylinder, 
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries

Size range is: 
O.D. 4-350mm, 
W.T. 0.5-30mm, 
Length: according to customer’s requirement and agreement
 

Steel Grade:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;

Carbon steel tube: SA178, A179, A192, A210, SA213, SA214, etc.
Alloy Steel Grade:
T2, T5, T9, T11, T12, T17, T21, T22, T91,T92, 15Mo3,16Mo3, 13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn;
Carbon steel tube: A179,A192,A210,DIN17175,etc.

Bearing Steel Grades:
GCr15 52100 suj2 suj3 100Cr6 SKF3S SKF3S 20CrNiMo 8620H 4118H;

Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219, N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925, N08926, N010276, N06022, etc.

Austenitic/Super Austenitic Stainless Steel Grade:
304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31254, XM-19, etc. 

Ferrite/Martensite Stainless Steel Grade:
TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439, TP446, etc. 

Duplex/Super Duplex Stainless Steel Grade:
S31803, S32304, S31500, S32550, S32750, S32760, etc. 
Corporate Culture:
We focus on Quality First, Quality Traceability, and Quality Stability!
We focus on Customer First, People First, and Quality-Oriented!
Success:
First factory started in 1997, in the name of Torich , now covers 50000 square meters of factory building, with more than 100employees, and over 45 million RBM assets.
In 2008, we started the company of Torich International Limited for international business and marketing.
Welcome partners from all over the world for long term cooperation!