Heat Exchanger Tube Specialist
DLSS supplies high-performance heat exchanger tubes in stainless steel, duplex, nickel alloy, titanium and copper nickel materials for condensers, evaporators, heaters and industrial heat transfer equipment.
- Straight Tubes
- U-Bend Tubes
- Finned Tubes
- Long Length Tubes
Wide Material Range
Stainless Steel, Duplex, Super Duplex, Nickel Alloy, Titanium and Copper Nickel tubes.
Long Length Capability
Custom tube lengths for demanding heat exchanger projects.
U-Bending Capability
Precision U-bend tubes manufactured according to drawings and specifications.
Inspection Support
ET, UT, PMI, Hydro Testing and EN 10204 documentation support.
Our Heat Exchanger Tube Solutions
DLSS provides a complete range of heat exchanger tubes designed for demanding industrial applications. From standard stainless steel tubes to advanced duplex, nickel alloy and titanium solutions, we support heat exchanger manufacturers and industrial projects worldwide.
Stainless Steel Heat Exchanger Tubes
304L, 316L, 321, 347H and 904L stainless steel tubes for general industrial applications requiring reliable corrosion resistance and performance.
Duplex & Super Duplex Heat Exchanger Tubes
S31803, S32205, S32750 and S32760 duplex tubes offering high strength and excellent resistance to chloride corrosion.
Nickel Alloy Heat Exchanger Tubes
Alloy 400, 600, 625, 825, C22 and C276 tubes for high-temperature and highly corrosive environments.
Copper Nickel Condenser Tubes
C70600 and C71500 copper nickel tubes for condensers, seawater cooling and marine heat exchanger systems.
Titanium Heat Exchanger Tubes
Titanium Grade 2 and Grade 7 tubes for seawater, desalination and corrosion-critical heat exchanger applications.
U-Bend & Finned Tubes
Special tube forms including U-bend tubes, low finned tubes and enhanced heat transfer solutions.
Materials for Demanding Heat Exchanger Applications
Selecting the correct tube material is critical for heat exchanger performance, corrosion resistance and service life. DLSS supplies a wide range of materials according to operating temperature, pressure and process conditions.
| Material | Typical Grades | Applications |
|---|---|---|
| Stainless Steel | 304L, 316L, 321, 347H | General Heat Exchangers |
| Duplex Stainless Steel | S31803, S32205 | Chemical & Seawater Applications |
| Super Duplex | S32750, S32760 | Severe Corrosion Environments |
| Nickel Alloy | 625, 825, C276 | High Temperature & Chemical Service |
| Titanium | Grade 2, Grade 7 | Desalination & Seawater |
| Copper Nickel | C70600, C71500 | Condensers & Cooling Systems |
Why Choose DLSS Heat Exchanger Tubes?
Heat exchanger projects require not only reliable materials, but also accurate dimensions, inspection control and responsive technical support. DLSS helps customers manage complex tube requirements from material selection to delivery.
5000+
Tons Stock
40+
Years Experience
40m+
Long Length Capability
EN10204
3.1 / 3.2 Support
Materials
SS / Duplex / Ni / Ti / CuNi
Global
Delivery
Industries We Serve
Heat Exchanger Manufacturers
OEM tube supply for shell and tube heat exchanger production.
Power Generation
Condenser, boiler and cooling system tube applications.
Oil & Gas
Tube solutions for refinery and petrochemical heat transfer equipment.
Chemical Processing
Corrosion-resistant tubes for demanding process conditions.
Desalination & Seawater
Titanium, duplex and copper nickel solutions for seawater environments.
Industrial Cooling
Reliable tube solutions for industrial heat transfer systems.
Tube Forms & Manufacturing Capability
From standard tubes to customized solutions, DLSS supports various heat exchanger tube requirements with reliable processing and inspection capabilities.
Custom Sizes
Special OD / WT / Length
Long Length Tubes
Large exchanger projects
U-Bending
Precision U-tube processing
Finned Tubes
Enhanced heat transfer
Heat Treatment
Solution annealing support
Inspection
HT / ET / UT / DPT / PMI
3.1 / 3.2 Support
Complete documentation
Professional Packing
Global shipment solutions
Strict Quality Control for Every Heat Exchanger Tube
Every stainless steel tube is inspected to ensure reliability, performance and full traceability.
Material & Dimensional Inspection
PMI and spectrometer testing ensure correct material grade and dimensional accuracy.
Ring Gauge Inspection
Ensures dimensional accuracy and proper tube fitting.
Hydrostatic Pressure Testing
Verifies strength and leak-proof performance under pressure.
Penetrant Testing (PT)
Detects surface cracks and defects effectively.
Borescope Inspection
Ensures internal surface quality and detects inner defects.
Visual Inspection
Checks external surface quality and appearance.
All tubes are inspected according to ASTM, ASME, EN standards and customer requirements.
Our Sustainability Efforts for the Next Generation
ISO 14001 Environmental Management
Wastewater Treatment Process
Energy-Efficient Heat Treatment Equipment
Material Recycling and Waste Control
Recent Heat Exchanger Tube Projects
Duplex Heat Exchanger Tube Project
Material:S32205Standard:ASTM A789Application:Chemical Heat Exchanger
Copper Nickel Condenser Project
Material:C70600Standard:ASTM B111Application:Power Plant Condenser
Titanium Tube Project
Material:Titanium Grade 2Standard:ASTM B338Application:Desalination
Heat Exchanger Tube Technical Center
Engineering information, standards and material guides to support tube selection and project decisions.
Material Guides
S32205, S32750, 625, Titanium
Tube Standards
ASTM A179,ASTM A213,ASTM B111,ASTM B338
Engineering Guides
Minimum WT vs Average WT,Tolerance Guides
Inspection Guides
ET,UT,PMI,3.1 / 3.2
Tube Selection Guides
Material Comparison
Downloads
Catalog,Datasheets
Technical Resources and Tube Standards
Galvanized Steel vs
1. Introduction When selecting materials for industrial piping, heat exchangers, condensers, and boiler systems, engineers often compare galvanized steel with stainless steel. Both are corrosion-resistant metals, yet their mechanisms, durability, and long-term performance differ significantly. At DLSS (Zhejiang Daling Special Steel Co., Ltd.), we manufacture and supply seamless and welded stainless steel tubes for demanding […]
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Can Stainless Steel
Stainless steel seamless pipes are widely used in heat exchangers, boilers, condensers, pressure piping, petrochemical plants, power generation, shipbuilding, and other demanding industrial systems. For heat exchanger and condenser projects, buyers often prefer stainless steel seamless heat exchanger tubes because they offer better pressure resistance, dimensional stability, and corrosion performance. A common question from engineers, […]
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5 Reasons Ultrasonic
Ultrasonic testing tube inspection is a critical non-destructive method used in the stainless steel tube industry to ensure product quality, safety, and compliance with international standards. Especially in industries such as heat exchangers, boilers, power plants, and oil & gas, even the smallest internal defect can lead to costly failures or system breakdowns. This article […]
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How to Pass
Introduction For heat exchanger projects in industries like oil & gas, power generation, and refineries, third-party certification is often non-negotiable. One of the highest levels of documentation is the EN 10204 3.2 certificate, which proves that material, testing, and inspection are approved by an independent authority—often required by EPC clients or government contracts. This guide […]
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