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.

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.

Seamless Stainless Steel Tubes Supplier

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 Stainless Steel Heat Exchanger Tubes Supplier

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 Supplier

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 Supplier

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.

MaterialTypical GradesApplications
Stainless Steel304L, 316L, 321, 347HGeneral Heat Exchangers
Duplex Stainless SteelS31803, S32205Chemical & Seawater Applications
Super DuplexS32750, S32760Severe Corrosion Environments
Nickel Alloy625, 825, C276High Temperature & Chemical Service
TitaniumGrade 2, Grade 7Desalination & Seawater
Copper NickelC70600, C71500Condensers & 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

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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 3.2 Certification for Heat Exchanger Tubing Projects

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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