Womic Stainless Steel Co., Ltd
• ASTM A179/ ASME SA179
• ASTM A269
• EN 10216-5
• GB/T 13296
• ASTM A213/ ASME SA 213, T11, T22, T22, T5
• ASTM A213/ ASME SA213, TP304/304L, TP316/316L, S31803, S32205, S32750, S32760, TP410;•ASTM B111, C44300, C68700, C70600, C71500
• ASTM B338, GR.1, GR.2
• Monel Alloys
• Nickel Alloys
ASTM A789 / ASTM A790
EN 10216-5
Grades
UNS S31803 / S32205 (Duplex 2205)
UNS S32750 / S32760 (Super Duplex 2507)
ASTM A213
Grades
UNS N08904 (904L)
(Nickel alloys, titanium and other special materials are available upon request.)
|
Grade |
C |
Cr |
Ni |
Mo |
N |
|
304 |
≤0.08 |
18–20 |
8–10.5 |
— |
— |
|
316L |
≤0.03 |
16–18 |
10–14 |
2–3 |
— |
|
321 |
≤0.08 |
17–19 |
9–12 |
— |
Ti |
|
2205 |
≤0.03 |
21–23 |
4.5–6.5 |
2.5–3.5 |
0.14–0.20 |
|
2507 |
≤0.03 |
24–26 |
6–8 |
3–5 |
0.24–0.32 |
|
904L |
≤0.02 |
19–23 |
23–28 |
4–5 |
— |
Yield Strength:
Austenitic:≥205 MPa
Duplex 2205:≥450 MPa
Tensile Strength:
Austenitic:≥515 MPa
Duplex 2205:≥620 MPa
Elongation:≥30%
Excellent resistance to thermal fatigue and stress corrosion cracking
Good thermal conductivity and pressure resistance
|
Material |
Chemical Composition(%) |
||||
|
C |
Si |
Mn |
P |
S |
|
|
STM A179/ASME SA179 |
0.06-0.18 |
≤0.25 |
0.27-0.63 |
≤0.035 |
≤0.035 |
|
Grade |
ASTM A179 |
|
Tensile Strength(MPa) |
≥325 |
|
Yield Strength(MPa) |
≥180 |
|
Elongation,% |
≥35 |
|
Hardness,HRB |
≤72 |
• OD 6.35mm–38.1mm（1/4” –1 1/2”)
• WT up to 6.35mm
• Bending radii 1.25 x OD up to 1700mm
• Bends can be supplied in accordance with TEMA R / ASTM SA/A556
• Leg length up to 15000mm
• Heat treatment where required by electric furnance or direct resistance
• Hydrotesting up to 10,000 psi
• Straight Length Before Bending: Up to 30 meters
• Bending Radius: As per TEMA / customer drawing
• Surface Finish: Bright Annealed (BA) , Annealed & Pickled (AP)
• Inner Surface Roughness: Ra 0.25–0.80μm
Eddy Current Test (ECT)
Ultrasonic Testing (UT–100%)
Hydrostatic Test
Flattening / Flaring Test
Bending Radius & Ovality Inspection
PMI (Positive Material Identification)
Dimensional & Surface Inspection
EN 10204 3.1 Mill Test Certificate
Womic Stainless Steel is fully equipped to perform heat treatment on U-bent tubes, including the bend area and a minimum of 150 mm of straight leg length on each side, ensuring uniform metallurgical properties after bending.
Computer-controlled heat treatment furnaces with real-time data recording and traceability
Argon protective atmosphere applied inside stainless steel and special alloy tubes to prevent oxidation and contamination
Capability to perform:
Solution Annealing
Stress Relieving
Other customized annealing processes according to material grade and application requirements
All heat treatment processes comply with applicable ASTM, ASME, EN, and customer-specified standards.
U-bent tubes are manufactured, controlled, and measured in strict accordance with relevant international standards
All tubes are cut to the specified leg lengths with high precision
Tube ends are fully deburred to ensure safe handling and proper installation
Internal bores are thoroughly cleaned using dried, oil-free compressed air, ensuring cleanliness suitable for heat exchanger service
These processes guarantee dimensional accuracy, surface integrity, and cleanliness, meeting the demanding requirements of shell and tube heat exchanger applications.
U-bent tubular exchanger tubes are widely used in:
Shell & Tube Heat Exchangers
Condensers & Evaporators
Boilers & Power Plants
Petrochemical & Refinery Units
Chemical Processing Plants
Seawater Coolers & Desalination Systems
Oil & Gas Processing Equipment
HVAC & District Heating Systems
Precision U-bending with minimal ovality
Uniform wall thickness after bending
Excellent thermal expansion resistance
Wide material and standard coverage
Suitable for high temperature & pressure service
Long service life and reduced maintenance cost
Competitive pricing and stable delivery
One-stop solution from straight tube to finished U-bent tube
Seamless tube production (cold drawn / cold rolled)
Solution annealing or bright annealing
Eddy current / ultrasonic testing
Precision U-bending with controlled radius
Stress relieving heat treatment (if required)
Dimensional & surface inspection
Final marking, packing and shipment
Plastic caps on tube ends
Individual protective wrapping
Wooden cases or steel frame packing
Seaworthy export packing
Customized packing available
Delivery terms: EXW / FOB / CFR / CIF
Container or bulk cargo shipment
Worldwide delivery to Europe, Middle East, Asia, Africa & Americas
Short lead time for standard sizes
Womic Stainless Steel–Professional U-Bent Heat Exchanger Tube Supplier
Email: info@womicstainless.com
Website: www.womicstainless.com
Contact us today for technical support, material selection, drawings review or fast quotation. Our engineering team is ready to support your heat exchanger projects.
