Womic Stainless Steel Co., Ltd
Superior Chloride Stress Corrosion Cracking Resistance:
Excellent resistance to chloride-induced SCC, significantly outperforming TP304 and TP316 in chloride-containing environments, especially at elevated temperatures.
High Mechanical Strength:
Minimum yield strength of ≥450 MPa (approximately twice that of TP304/TP316L), allowing for thinner wall sections, weight reduction, and improved heat transfer efficiency.
Excellent Pitting and Crevice Corrosion Resistance:
PRE (Pitting Resistance Equivalent) ≥ 34 for S31803 and ≥ 35 for S32205, providing reliable service in seawater, brackish water, and aggressive chemical media.
Good Heat Transfer Efficiency:
Higher thermal conductivity than austenitic stainless steels, combined with the ability to use thinner walls due to higher strength, results in excellent overall heat transfer coefficients.
Good Weldability and Fabricability:
Maintains balanced ferrite/austenite ratio in the weld zone with proper welding procedures, suitable for tube-to-tubesheet welding and U-bending.
High Resistance to Erosion and Corrosion Fatigue:
Ideal for high-velocity seawater and slurry heat exchanger applications where combined mechanical and corrosive attack occurs.
Low Thermal Expansion:
Lower coefficient of thermal expansion than austenitic grades, reducing thermal stress in tube sheets and improving fatigue life in cyclic service.
Precision Dimensional Accuracy:
Strict tolerances on outside diameter (OD), wall thickness, and concentricity ensure proper fitment in tube sheets and consistent heat transfer performance.
International Certification:
Tubes can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with NORSOK M-630, ISO 17781, and NACE MR0175/ISO 15156 for sour service applications.
The Duplex 2205 Heat Exchanger Tubes produced by Womic Steel conform to multiple international specifications used in heat transfer equipment, pressure vessels, and corrosive service:
|
Standard |
Description |
Equivalent Grade / Material Number |
|
ASTM A789 / ASME SA789 |
Seamless and welded ferritic/austenitic stainless steel tubing for general service |
S31803 / S32205 |
|
ASTM A790 / ASME SA790 |
Seamless and welded ferritic/austenitic stainless steel pipe |
S31803 / S32205 |
|
ASTM A213 / ASME SA213 |
Seamless ferritic and austenitic alloy steel boiler, superheater, and heat exchanger tubes |
S31803 / S32205 (upon agreement) |
|
EN 10216-5 |
Seamless stainless steel tubes for pressure purposes |
1.4462 (X2CrNiMoN22-5-3) |
|
EN 10217-7 |
Welded stainless steel tubes for pressure purposes |
1.4462 (X2CrNiMoN22-5-3) |
|
DIN 17458 |
Austenitic stainless seamless tubes (duplex supplement) |
X2CrNiMoN22-5-3 |
|
JIS G3463 |
Stainless steel boiler and heat exchanger tubes |
SUS329J3L |
|
GB/T 21833 |
Seamless and welded duplex stainless steel pipes for heat exchanger |
022Cr22Ni5Mo3N |
|
ISO 17781 |
Duplex stainless steel tubes for petroleum and natural gas industries |
1.4462 |
|
NACE MR0175 / ISO 15156 |
Sour service compliance |
S31803 / S32205 |
These standards ensure that Duplex 2205 Heat Exchanger Tubes meet global requirements for chemical composition, balanced dual-phase microstructure, mechanical performance, dimensional accuracy, and non-destructive examination.
Different specifications can be customized according to special requirements.
|
Execution Standard |
Main Standard |
Standard Grade |
|
ASTM (USA) |
ASTM A213, A269, A249, A789, A790 |
TP304/L, TP316/L, TP321/H, TP347/H, S31803, S32205, S32750, S32760 |
|
ASME (USA) |
SA213, SA249, SA789, SA790 |
TP304/L/H, TP316/L/H, TP321/H, TP347/H, S31803, S32205, S32750, S32760 |
|
EN / DIN (Europe) |
EN 10216-5, EN 10217-7 |
X2CrNi18-9 (1.4307), X2CrNiMo17-12-2 (1.4404), X2CrNiMoN22-5-3 (1.4462), X2CrNiMoN25-7-4 (1.4410) |
|
JIS (Japan) |
JIS G3463 |
SUS304TB, SUS304LTB, SUS316TB, SUS316LTB, SUS321TB, SUS347TB, SUS329J3L, SUS329J4L |
|
GB (China) |
GB/T 13296, GB/T 21833 |
06Cr19Ni10, 022Cr19Ni10, 07Cr17Ni12Mo2, 022Cr17Ni12Mo2, 022Cr22Ni5Mo3N, 022Cr25Ni7Mo4N |
|
ISO (International) |
ISO 9329-4, ISO 17781 |
X2CrNi18-9, X2CrNiMo17-12-2, X2CrNiMoN22-5-3, X2CrNiMoN25-7-4 |
|
Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
N |
|
S31803 |
≤0.030 |
≤2.00 |
≤0.030 |
≤0.020 |
≤1.00 |
21.0–23.0 |
4.5–6.5 |
2.5–3.5 |
0.08–0.20 |
|
S32205 |
≤0.030 |
≤2.00 |
≤0.030 |
≤0.020 |
≤1.00 |
22.0–23.0 |
4.5–6.5 |
3.0–3.5 |
0.14–0.20 |
Note: S32205 is a restricted composition range of S31803, offering tighter control of Cr, Mo, and N to enhance corrosion resistance and ensure optimal phase balance. The addition of nitrogen (N) promotes austenite stability and significantly increases pitting resistance. Compared to TP316L, Duplex 2205 offers:
l Twice the yield strength (450 MPa vs 170 MPa)
l Superior chloride SCC resistance
l Higher thermal conductivity (approximately 30% higher)
l Lower coefficient of thermal expansion
Pitting Resistance
Equivalent (PRE) Calculation:
PRE = %Cr + 3.3 × %Mo + 16 × %N ≥ 34 (S31803) / ≥ 35 (S32205)
|
Property |
TP316L |
Duplex 2205 |
Advantage |
|
Yield Strength (MPa) |
≥170 |
≥450 |
2205 (2.6x stronger) |
|
Thermal Conductivity (W/m·K) |
16.3 |
19.0 |
2205 (17% higher) |
|
CTE (μm/m·K, 20–100°C) |
15.9 |
13.5 |
2205 (lower thermal stress) |
|
Chloride SCC Resistance |
Moderate |
Excellent |
2205 |
|
PRE |
24–26 |
34–35 |
2205 |
|
Wall Thickness Required |
Standard |
Reduced |
2205 (lighter, better heat transfer) |
The Duplex 2205 Heat Exchanger Tube offers balanced strength and ductility, with excellent high-temperature properties for heat transfer applications.
|
Property |
Unit |
S31803 / S32205 |
|
Tensile Strength (min) |
MPa |
≥620 |
|
Yield Strength (0.2% offset, min) |
MPa |
≥450 |
|
Elongation (min) |
% |
≥25 |
|
Hardness (Brinell, max) |
HBW |
≤290 |
|
Hardness (Rockwell C, max) |
HRC |
≤30 |
|
Density |
g/cm³ |
7.80 |
|
Melting Range |
°C |
1350–1400 |
|
Thermal Conductivity (20°C) |
W/m·K |
19.0 |
|
Thermal Conductivity (100°C) |
W/m·K |
19.5 |
|
Coefficient of Thermal Expansion (20–100°C) |
μm/m·K |
13.5 |
|
Specific Heat Capacity (20°C) |
J/kg·K |
480 |
|
Electrical Resistivity (20°C) |
μΩ·m |
0.80 |
Impact Toughness (Charpy V-Notch, typical at -40°C) :
Longitudinal: ≥ 60 J (typical)
Maximum Recommended Service Temperatures:
|
Service Condition |
Maximum Temperature |
|
Continuous Service (Oxidizing/Chloride Environment) |
250°C (482°F) |
|
Intermittent Service |
300°C (572°F) |
|
Sour Service (NACE MR0175) |
232°C (450°F) |
|
Minimum Service Temperature |
-40°C (-40°F) |
Critical Note: Duplex 2205 is not recommended for prolonged service above 300°C due to the risk of embrittling intermetallic phase precipitation. For heat exchanger applications above 300°C, super duplex grades (S32750/S32760) or austenitic grades (TP321/TP347) should be considered.
Heat Treatment
Condition:
Duplex 2205 Heat Exchanger Tubes are solution annealed at 1040–1120°C followed by rapid cooling (water quenching) .
This heat treatment:
l Restores the balanced 40–60% ferrite / 40–60% austenite microstructure.
l Dissolves unwanted intermetallic phases (sigma, chi) that can reduce corrosion resistance and toughness.
l Relieves internal stresses from cold drawing or cold pilgering.
l Ensures optimal mechanical properties and maximum corrosion resistance.
l Critical Note: Unlike austenitic grades (TP304/TP316), Duplex 2205 requires water quenching after solution annealing. Air cooling is insufficient and will result in intermetallic phase precipitation, severely reducing corrosion resistance and toughness.
Delivery Condition:
Tubes are normally supplied in solution annealed and pickled condition, providing a
clean, smooth surface and excellent corrosion resistance. Bright annealing is
not recommended for duplex grades due to the water quenching requirement.
Womic Steel adopts advanced production technology to ensure each Duplex 2205 Heat Exchanger Tube meets exact specifications with balanced microstructure and flawless surface quality.
· Raw Material Selection: High-quality S31803/S32205 duplex stainless steel billets from certified mills (Outokumpu, Sandvik, POSCO, Baosteel) with certified chemical composition and ferrite/austenite balance.
· Heating and Piercing: Billets heated to controlled temperature (lower than austenitic grades to prevent ferrite coarsening) and pierced using a rotary piercing mill.
· Hot Rolling: Shells elongated and rolled to desired intermediate size with strict temperature control.
· Cold Drawing / Cold Pilgering: Tubes refined to precise dimensions with improved surface finish and enhanced mechanical properties.
· Solution Annealing: Critical heat treatment at 1040–1120°C followed by water quenching to restore balanced duplex structure.
· Pickling & Passivation: Removal of oxides and creation of passive film; special pickling acids optimized for duplex grades.
· Straightening and Dimensional Calibration: Ensures consistent roundness, straightness, and wall uniformity. Special attention to OD tolerance for tube sheet fitment.
· Cutting and End Finishing: Tubes cut to precise lengths with square ends, deburred, and prepared for tube sheet insertion.
· Ferrite Content Measurement: Verification of phase balance – typically 35–65% ferrite.
· Final Inspection & Marking: Each tube tested, marked with grade, heat number, standard, and tube dimensions before packing.
This process guarantees a balanced dual-phase microstructure, smooth internal bore, high structural integrity, precise dimensional accuracy, and exceptional corrosion resistance across all batches of Womic Steel’s Duplex 2205 Heat Exchanger Tubes.
Womic Steel utilizes state-of-the-art manufacturing technology to ensure every Welded Duplex 2205 Heat Exchanger Tube meets precise specifications with weld zone phase balance and excellent surface quality.
1. Raw Material Selection: High-quality S31803/S32205 duplex stainless steel strips/coils from certified suppliers with full traceability.
2. Slitting & Uncoiling: Precision slitting to required width; edge preparation to ensure clean, burr-free edges for welding.
3. Forming & Welding: The strip is progressively formed into a cylindrical shape. The edges are welded using advanced TIG or Plasma welding with:
l Strict heat input control (typically 0.5–1.5 kJ/mm)
l Shielding gas: Ar + N₂ (2–5% nitrogen) to prevent nitrogen loss
l Matching filler metal (ER2209) for optimal weld properties
4. Weld Seam Treatment: External weld bead removal to achieve smooth surface flush with base metal. Internal bead may be controlled or removed.
5. Solution Annealing: Full heat treatment of the entire welded tube at 1040–1120°C followed by water quenching – essential for restoring corrosion resistance and balanced microstructure in the weld and HAZ.
6. Sizing & Calibration: The tube is passed through a sizing mill to achieve final precise OD and roundness.
7. Straightening: The tube is straightened to ensure optimal linearity for tube sheet insertion.
8. Non-Destructive Testing (NDT) : Weld seam inspected using Eddy Current Testing (ECT) or Ultrasonic Testing (UT). 100% of tube length tested.
9. Hydrostatic Testing: Each tube pressure tested to verify leak-tight integrity.
10.Ferrite Content Measurement: Verification of weld and base metal phase balance (35–65% ferrite).
11.Final Inspection & Marking: Complete dimensional check, visual inspection, and traceable marking.
This controlled process guarantees a sound weld seam, excellent dimensional accuracy, balanced duplex microstructure, and superior corrosion resistance for every batch of Womic Steel’s Welded Duplex 2205 Heat Exchanger Tubes.
1. Outside Diameter (OD) : 6.0mm – 114.3mm (1/4″ – 4″)
l Common sizes: 12.70mm (1/2″), 15.88mm (5/8″), 19.05mm (3/4″), 25.40mm (1″), 31.80mm (1-1/4″), 38.10mm (1-1/2″), 44.50mm (1-3/4″), 50.80mm (2″)
2. Wall Thickness (WT) : 0.5mm – 5.0mm (BWG 10 – BWG 22)
l Due to higher strength, thinner walls can be used compared to austenitic grades
l Common BWG gauges: 10, 11, 12, 13, 14, 15, 16, 18
3. Length: Up to 30m (straight lengths); U-bent tubes available per customer drawing
4. OD Tolerances:
l Standard: ±0.10mm
l Precision: ±0.05mm (upon request)
5. Wall Thickness Tolerances:
l Standard: ±10% of nominal
l Precision: ±8% of nominal (upon request)
6. Straightness: 0.5mm per 1000mm length typical, tighter upon request
7. Surface Roughness (Internal) :
l Standard: Ra ≤ 0.8μm
l Polished: Ra ≤ 0.4μm (upon request)
|
ANSI B 36.19/ANSI B36.10 DIMENSIONS OF SEAMLESS &WELDED STAINLESS STEEL PIPE |
|||||||||||||||||||
|
Nominalsize |
mm |
ANSIB36.19 |
ANSIB36.10ANSIB36.10 |
||||||||||||||||
|
DN |
NPS |
mm |
5S |
10S |
40S |
80S |
10 |
20 |
30 |
STD |
40 |
60 |
XS |
80 |
100 |
120 |
140 |
160XXS |
|
|
6 |
1/8" |
10.29 |
|
1.24 |
1.73 |
2.41 |
|
|
|
1.73 |
1.73 |
|
2.41 |
2.41 |
|
|
|
|
|
|
8 |
1/4" |
13.72 |
|
1.65 |
2.24 |
3.02 |
|
|
|
2.24 |
2.24 |
|
3.02 |
3.02 |
|
|
|
|
|
|
10 |
3/8" |
17.15 |
|
1.65 |
2.31 |
3.20 |
|
|
|
2.31 |
2.31 |
|
3.20 |
3.20 |
|
|
|
|
|
|
15 |
1/2" |
21.34 |
1.65 |
2.11 |
2.77 |
3.73 |
|
|
|
2.77 |
2.77 |
|
3.73 |
3.73 |
|
|
|
4.78 |
7.47 |
|
20 |
3/4" |
26.67 |
1.65 |
2.11 |
2.87 |
3.91 |
|
|
|
2.87 |
2.87 |
|
3.91 |
3.91 |
|
|
|
5.56 |
7.82 |
|
25 |
1" |
33.4 |
1.65 |
2.77 |
3.38 |
4.55 |
|
|
|
3.38 |
3.38 |
|
4.55 |
4.55 |
|
|
|
6.35 |
9.09 |
|
32 |
1 1/4" |
42.16 |
1.65 |
2.77 |
3.56 |
4.85 |
|
|
|
3.56 |
3.56 |
|
4.85 |
4.85 |
|
|
|
6.35 |
9.70 |
|
40 |
1 1/2" |
48.26 |
1.65 |
2.77 |
3.68 |
5.08 |
|
|
|
3.68 |
3.68 |
|
5.08 |
5.08 |
|
|
|
7.14 |
10.16 |
|
50 |
2" |
60.33 |
1.65 |
2.77 |
3.91 |
5.54 |
|
|
|
3.91 |
3.91 |
|
5.54 |
5.54 |
|
|
|
8.74 |
11.07 |
|
65 |
2 1/2" |
73.03 |
2.11 |
3.05 |
5.16 |
7.01 |
|
|
|
5.16 |
5.16 |
|
7.01 |
7.01 |
|
|
|
9.52 |
14.02 |
|
80 |
3" |
88.9 |
2.11 |
3.05 |
5.49 |
7.62 |
|
|
|
5.49 |
5.49 |
|
7.62 |
7.62 |
|
|
|
11.13 |
15.24 |
|
90 |
3 1/2" |
101.6 |
2.11 |
3.05 |
5.74 |
8.08 |
|
|
|
5.74 |
5.74 |
|
8.08 |
8.08 |
|
|
|
|
|
|
100 |
4" |
114.3 |
2.11 |
3.05 |
6.02 |
8.56 |
|
|
|
6.02 |
6.02 |
|
8.56 |
8.56 |
|
11.13 |
|
13.50 |
17.12 |
|
125 |
5” |
141.3 |
2.77 |
3.40 |
6.55 |
9.52 |
|
|
|
6.55 |
6.55 |
|
9.52 |
9.52 |
|
12.70 |
|
15.90 |
19.05 |
|
150 |
6" |
168.28 |
2.77 |
3.40 |
7.11 |
10.97 |
|
|
|
7.11 |
7.11 |
|
10.97 |
10.97 |
|
14.30 |
|
18.20 |
21.95 |
|
200 |
8" |
219.08 |
2.77 |
3.76 |
8.18 |
12.70 |
|
6.35 |
7.04 |
8.18 |
8.18 |
10.30 |
12.70 |
12.70 |
15.10 |
18.20 |
20.60 |
23.00 |
22.22 |
|
250 |
10" |
273.05 |
3.40 |
4.19 |
9.27 |
12.70 |
|
6.35 |
7.80 |
9.27 |
9.27 |
12.70 |
12.70 |
15.09 |
18.26 |
21.44 |
25.40 |
28.58 |
|
|
300 |
12" |
323.85 |
3.96 |
4.57 |
9.52 |
12.70 |
|
6.35 |
8.38 |
9.52 |
10.31 |
14.27 |
12.70 |
17.48 |
21.44 |
25.40 |
28.58 |
33.32 |
|
|
350 |
14" |
355.6 |
3.98 |
4.78 |
|
|
6.35 |
7.92 |
9.52 |
9.52 |
11.13 |
15.09 |
12.70 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
|
|
400 |
16" |
406.4 |
4.19 |
4.78 |
|
|
6.35 |
7.92 |
9.52 |
9.52 |
12.70 |
16.66 |
12.70 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
|
|
450 |
18" |
459.2 |
4.19 |
4.78 |
|
|
6.35 |
7.92 |
11.13 |
9.52 |
14.27 |
19.05 |
12.70 |
23.83 |
29.36 |
34.92 |
39.67 |
45.24 |
|
|
500 |
20" |
508 |
4.77 |
5.53 |
|
|
6.35 |
9.52 |
12.70 |
9.52 |
15.09 |
20.62 |
12.70 |
26.19 |
32.54 |
38.10 |
44.45 |
50.01 |
|
|
550 |
22" |
558.8 |
4.77 |
5.53 |
|
|
6.35 |
9.52 |
12.70 |
9.52 |
15.87 |
22.22 |
12.70 |
28.57 |
34.92 |
41.27 |
47.62 |
53.97 |
|
|
600 |
24" |
609.6 |
5.54 |
6.35 |
|
|
6.35 |
9.52 |
14.70 |
9.52 |
17.48 |
24.61 |
12.70 |
30.96 |
38.89 |
46.02 |
52.37 |
59.94 |
|
|
650 |
26" |
660.4 |
|
|
|
|
7.92 |
12.70 |
|
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
700 |
28" |
711.2 |
|
|
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
750 |
30" |
762 |
6.35 |
7.92 |
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
800 |
32" |
812.8 |
|
|
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
Womic Steel offers a range of surface finishes for Duplex 2205 heat exchanger tubes, each suited to specific industrial and marine applications.
|
Surface Type |
Description |
Typical Applications |
|
Annealed & Pickled (AP Finish) |
Standard industrial finish – matte, oxide-free after acid treatment. |
Most heat exchanger applications, seawater coolers, chemical service. |
|
Passivated Finish |
Surface chemically treated to enhance the protective passive film. |
Critical marine and offshore applications. |
|
Polished Finish (180#, 240#, 320#) |
Smooth mechanical finish, reduced surface roughness. |
Reduced fouling applications, food processing. |
|
Grit Blasted / Bead Blasted |
Matte, uniform surface texture. |
Specialized applications requiring specific surface profile. |
Note: Bright annealing is not recommended for Duplex 2205 due to the water quenching requirement. Polished finishes are available upon request but are less common for duplex grades.
Each Duplex 2205 Heat Exchanger Tube surface is inspected for uniform appearance, absence of pits, scratches, and consistent finish quality. Internal surface roughness (Ra) can be certified upon request.
Every Duplex 2205 Heat Exchanger Tube undergoes comprehensive inspection in accordance with ASTM, EN, and NORSOK standards, including duplex-specific critical tests:
|
Test / Inspection |
Description |
Applicability |
|
Visual & Dimensional Inspection |
Surface finish, OD, WT, length, roundness, straightness checked. |
100% |
|
Hydrostatic Pressure Test |
100% tested for leakage and pressure resistance. |
100% |
|
Eddy Current Test (ECT) |
Detects surface and sub-surface imperfections. |
100% |
|
Ultrasonic Test (UT) |
Ensures internal integrity of tube wall. |
Upon request |
|
Positive Material Identification (PMI) |
Confirms correct chemical grade (Cr, Ni, Mo, N verification). |
100% (per heat) |
|
Ferrite Content Measurement |
Magnetic induction method – requirement: 35–65% ferrite. |
100% |
|
Microstructure Examination |
Verification of balanced dual-phase structure, absence of intermetallic phases. |
Per heat / batch |
|
Tensile Testing |
Confirms ≥620 MPa UTS and ≥450 MPa yield strength. |
Per heat / batch |
|
Hardness Testing |
Brinell or Rockwell – max ≤290 HBW / ≤30 HRC. |
Per heat / batch |
|
Charpy Impact Testing |
Verifies low-temperature toughness at -40°C. |
Per heat (offshore) |
|
Intergranular Corrosion Test (IGC) |
ASTM A262 Practice E – validates resistance to sensitization. |
Per heat / batch |
|
Pitting Corrosion Test |
ASTM G48 Method A – 24 hours in 6% FeCl₃ at 40°C. |
Per heat (NORSOK) |
|
Flattening Test |
Evaluates ductility and deformation capability. |
Per heat / batch |
|
Flaring Test |
Evaluates ability to expand without cracking. |
Per heat / batch |
|
Surface Roughness Check (Ra) |
Profilometer measurement for polished tubes. |
Upon request |
|
Third-Party Inspection |
SGS / BV / DNV / TUV / LR – witnessed testing. |
Upon customer request |
These extensive tests ensure that every Duplex 2205 Heat Exchanger Tube from Womic Steel meets the highest international standards for reliability, corrosion resistance, and longevity in demanding heat transfer applications.
Duplex 2205 Heat Exchanger Tubes are ideal for a wide variety of industries where chloride corrosion resistance and high strength are required:
|
Industry |
Typical Applications |
|
Marine & Offshore |
Seawater coolers, platform heat exchangers, ballast water heaters, hydraulic oil coolers, engine cooling systems (ship classification certifications available from ABS, BV, DNV, LR, GL, RINA, CCS, KR, NK). |
|
Chemical Processing |
Shell-and-tube heat exchangers for chloride-containing process streams, acid coolers, evaporators, condensers, reboilers. |
|
Desalination Plants |
Brine heaters, brine preheaters, multi-stage flash (MSF) evaporators, reverse osmosis preheaters, energy recovery heat exchangers. |
|
Oil & Gas |
Sour service heat exchangers (NACE MR0175), topside coolers, gas coolers, crude oil heaters, produced water coolers. |
|
Pulp & Paper Industry |
Black liquor evaporators, bleach plant heat exchangers, digester heat recovery systems. |
|
Refining |
Crude oil heat exchangers, fractionator condensers, hydrotreater feed/effluent heat exchangers. |
|
Fertilizer Production |
Phosphoric acid heat exchangers, ammonia plant coolers. |
|
HVAC & Refrigeration |
Chiller condensers and evaporators for coastal installations, seawater-cooled systems. |
|
Power Generation |
Coastal power plant condensers, cooling water heat exchangers, auxiliary coolers. |
|
Food & Beverage |
Brine cooling systems, pasteurizers for coastal facilities. |
Each Duplex 2205 Heat Exchanger Tube is securely packed and clearly labeled to ensure safe and efficient transport worldwide. Special care is taken to protect tube ends, internal surfaces, and prevent bending during transit.
|
Packaging Type |
Description |
Suitable For |
|
Bundle Packing (Hexagonal) |
Hexagonal bundle with woven fabric wrapping, iron strip bundle, plastic cap on both ends. |
Local truck transport. |
|
Bundle Packing (Square) |
Square bundle with steel straps, plastic end caps, moisture barrier paper. |
Export sea-worthy transport. |
|
Wooden Crate Packing |
Wooden crates with foam padding, individual tube separation, plastic end caps. |
High-value tubes, polished finish, long-length tubes. |
|
Steel Crate Packing |
Reinforced steel crates with internal padding. |
Heavy-wall tubes, multiple-bundle consolidation. |
|
U-Bend Tube Packing |
Custom wooden crates with support saddles to maintain bend radius. |
U-bent heat exchanger tubes. |
· End Protection: Plastic caps on both ends for all tubes
· Moisture Protection: VCI paper or moisture barrier wrapping for sea freight
· Labeling: Grade, heat number, standard, dimensions, PO number
· Documentation: Packing list, material test reports (MTR), inspection certificates
Direct cooperation with global shipowners ensures the most competitive freight rates.
Professional loading and securing teams – special care for tube bundles to prevent bending, scratching, and end damage.
Efficient document preparation – EN 10204 3.1/3.2 certificates, MTR, PMI reports, ferrite measurement reports – minimizing customs delays.
Rapid delivery time – standard sizes kept in ready stock.
Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.
Custom length cutting available upon request – up to 30m straight lengths.
U-bend tube fabrication – custom bending per customer drawing with full heat treatment after bending.
Womic Steel is a trusted manufacturer and exporter specializing in duplex stainless steel heat exchanger tubes, committed to delivering premium quality and professional service for demanding heat transfer applications.
1. Strict quality control under ISO 9001, PED 2014/68/EU, and NORSOK M-630 compliance.
2. Duplex expertise – specialized knowledge in phase balance control, heat treatment (water quenching), and duplex welding procedures.
3. Modern production lines – cold pilger mills, TIG welded tube mills with nitrogen shielding.
4. Complete in-house testing – including ferrite measurement, PMI, mechanical testing, and optional corrosion testing.
5. NACE MR0175 compliance – full documentation for sour service applications.
6. Superior strength – twice the yield strength of TP316L allows thinner walls and better heat transfer.
7. Flexible customization – special OD, WT, length, surface finish, U-bends.
8. Fast production cycle – seamless and welded tube manufacturing with competitive lead times.
9. Reliable global shipping – to all major ports (Houston, Rotterdam, Singapore, Shanghai, Dubai, etc.).
10.Direct mill pricing – no middlemen, ensuring competitive costs.
11.Wide material range – from TP304/304L and TP316/316L to Duplex 2205, Super Duplex 2507, and nickel alloys.
For inquiries, technical support, or to request a quotation for your specific clad pipe requirements, please contact us:
Website: www.womicstainless.com
E‑mail: info@womicstainless.com
Tel / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Womic Steel – Your reliable partner for high‑quality stainless steel seamless pipes, metallurgically bonded clad tubes, and custom solutions for corrosion‑resistant applications.
