Stainless Steel U Tube

Stainless steel U tubes signify an exceptional blend of robustness and practicality, extensively used in heat exchanger systems across various industries, such as petrochemicals, power generation, and refineries. Apart from being the namesake, the "U" shape of these tubes is particularly designed to promote efficient heat transfer, making stainless steel U tubes an integral part of any high-efficiency heat exchanger.


The U shape of these tubes serves a critical purpose: it helps effectuate the transfer of heat between two fluids through conduction. By augmenting the surface area exposed to both fluids, without a corresponding increase in length, it allows for a more compact design, without compromising the exchanger's efficiency. Therefore, stainless steel U tubes can be employed in spaces where room is a limited resource.


These tubes come in various grades like 304, 316, 316L, and 317L depending on the specific requirement of the application. Each grade offers a different level of resistance to specific corrosive agents while providing varying degrees of workability and durability.


Adopted for its easy customization property, a U tube’s bend radius can be modified according to the heat transfer requirement, ensuring an adaptable solution to thermal management. The bending process itself is performed with excellent precision, ensuring uniform wall thickness throughout the tube, thereby eliminating any instances of weak spots that could compromise a system's integrity.


Stainless steel U tubes, with their dynamic combination of design and material advantages, serve as a vital component in today’s heat exchanger systems. Through efficient heat transfer, robust durability, corrosion resistance, and ability to be customized, they clearly form a backbone for numerous demanding industrial applications.

Specification

Standards -
Types Welded, Seamless, ERW, Fabricated, CEW, CDW, CDS, DOM
Size range 1/2" OD - 12" OD
Production technique Decoiling, Punching, Bending, Welding,  Cutting, Moulding
Standards ASTM, AISI, JIS, DIN, EN, SUS, GB
Form Round, Hydraulic,  Coiled,  Square,  U Shape,  Rectangular,  Straight,  Honed Tubes,  Pan Cake Coils
Thickness Range SCH 10, SCH 160, SCH XXH, SCH XXS, SCH 5, SCH 40, SCH XS, SCH 80S, SCH 80
Custom Size/Thickness Available
End Treaded, Beveled End, Plain End
Surface Finish 8K,  1D,  No.3,  180G,  BA,  No.4,  500G,  No.1,  Mirror Polished,  320G,  HL,  No.8, 400G,  2B,  600G or 800G Mirror finish Tubing,  2D,  400G Satin/ Hairline or Custom Finish as per customer's specification.
Marking Standard
Name of Manufacturer
Schedule
Pressure Class
Tube Size, etc
Test Certificates
Third Party Inspection Report
Manufacturer Test Certificate
Raw Materials Certificate
100% Radiography Test Report
Laboratory Test Certificate from Govt. Approved Lab
EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)

Available Tubes in Our Warehouse

Thin Wall Tubing

Thin Wall Tubing

Seamless Tube

Seamless Tube

Erw Tube

Erw Tube

Bright Annealed Tube

Bright Annealed Tube

Coil Tubing

Coil Tubing

Condenser Tube

Condenser Tube

Welded Tube

Welded Tube

Heat Exchanger Tube

Heat Exchanger Tube

Small Diameter Tubing

Small Diameter Tubing

Equivalent Grades

StandardUnified Numbering SystemWerkstoff Nr.European StandardsJapanese Industrial StandardsGOSTBritish StandardsAFNOR
304S304001.4301X5CrNi18-10SUS 30408Х18Н10304S31Z7CN18‐09
304LS304031.4306 / 1.4307X2CrNi18-9 / X2CrNi19-11SUS 304L03Х18Н113304S11Z3CN18‐10
304HS304091.4301
310S310001.4841X15CrNi25-20SUS 31020Ch25N20S2310S24
310SS310081.4845X8CrNi25-21SUS 310S20Ch23N18310S16
310HS31009
316S316001.4401 / 1.4436X5CrNiMo17-12-2 / X3CrNiMo17-13-3SUS 316316S31 / 316S33Z7CND17‐11‐02
316LS316031.4404 / 1.4435X2CrNiMo17-12-2 / X2CrNiMo18-14-3SUS 316L03Ch17N14M3 / 03Ch17N14M2316S11 / 316S13Z3CND17‐11‐02 / Z3CND18‐14‐03
316HS316091.4401
316TiS316351.4571X6CrNiMoTi17-12-2SUS 316Ti08Ch17N13M2T320S31Z6CNDT17‐123
317S317001.4449SUS 317
317LS317031.4438X2CrNiMo18-15-4SUS 317L
321S321001.4541X6CrNiTi18-10SUS 321
321HS321091.4878X12CrNiTi18-9SUS 321H
347S347001.4550X6CrNiNb18-10SUS 34708Ch18N12B
347HS347091.4961X6CrNiNb18-12SUS 347H
904LN089041.4539X1NiCrMoCu25-20-5SUS 904LSTS 317J5L904S13Z2 NCDU 25-20

Chemical Composition

GradesCarbonSulfurManganeseSiliconNickelPhosphorusChromiumMolybdenum
TP3040.080.03218.0-11.00.04518.0-20.0
TP304L0.0350.03218.0-13.00.04518.0-20.0
TP3160.080.032111.0-14.00.04516.0-18.02.0-3.0
TP316L0.0350.032110.0-14.00.04516.0-18.02.0-3.0

Mechanical Properties

GradeYield StrengthTemperureHeatTensile StrengthElongation
Ksi (MPa), Min.º F(º C)TreatmentKsi (MPa), Min.
TP30430(205)1900 (1040)Solution75(515)35
TP304L25(170)1900 (1040)Solution70(485)35
TP31630(205)1900(1040)Solution75(515)35
TP316L25(170)1900(1040)Solution70(485)35

U Shaped Tubes Wall Thickness

GaugeTypical Value in InchThickness Range in Inch
170.0580.053 through 0.058
110.120.112 through 0.122
200.0350.031 through 0.035
190.0420.038 through 0.042
90.1480.140 through 0.150
220.0280.025 through 0.029
180.0490.044 through 0.049
100.1340.126 through 0.136
160.0650.060 through 0.065
150.0720.066 through 0.074
130.0950.087 through 0.097
120.1090.101 through 0.111
140.0830.075 through 0.085
80.1650.157 through 0.167
70.180.175 through 0.185

Weight Chart

Wall thickness in mm0.520.80.713.61.20.61.63.22.63
Outer Diameter in mm.Weight in kg/meter
9.520.1120.1740.1540.2130.2490.1340.317
15.870.1920.6940.3010.2660.3720.440.2290.571
100.1190.1840.1630.2250.2640.1410.336
12.70.1530.2380.210.2930.3450.1820.444
44.52.1253.6811.2991.7163.3042.7243.113
60.0690.1040.0930.1250.1440.0810.176
25.40.3111.170.4920.4320.611.9620.7260.3720.9521.7761.4821.68
63.53.0755.3912.4764.8243.9594.538
140.1690.2640.2330.3250.3840.2010.496
190.2310.850.3640.320.450.5340.2760.6961.2641.0661.2
250.3061.150.4840.4250.61.9260.7140.3660.9361.7441.4561.65
31.81.492.5380.9181.2082.2881.8982.16
381.83.0961.1041.4562.7842.3012.625
50.82.444.2481.4881.9683.8083.1333.585
76.13.7056.5252.985.8324.7785.483
101.64.988.8247,87267

Application

Aerospace

Cleaning Factories

Food Processing

Food Processing

Oil and Gas

Oil and Gas

Pharmaceutical

Pharmaceutical

Power Plant

Power Plant

Ship Building

Ship Building

Water Systems

Water Systems

Refinery

Refinery