One-stop solution for heat exchanger
Customized for Every Heat Exchanger
U-Tubes for Heat Exchanger
High heat transfer efficiency, compact structure, easy maintenance, thermal expansion accommodation, design flexibility, durability, and cost-effectiveness are the advantages of U-tube heat exchangers produced by DLSS.
Pickling tubes for Heat Exchanger
Enhanced corrosion resistance and cost-effectiveness provide our pickling tubes with greater market competitiveness, making them ideal for heat exchanger production with durability and long service life.
Bright tubes for Heat Exchanger
Smooth surfaces reduce fluid adhesion, minimize cleaning, enhance heat transfer, and extend heat exchanger life, making our bright tubes ideal for heat exchanger production.
Finned tubes for Heat Exchanger
High heat transfer efficiency, durability, and corrosion resistance make our fin tubes ideal for heat exchanger applications.
Tube Sheets for Heat Exchanger
Ensures secure tube placement and optimal heat transfer through precision-engineered tube sheets for heat exchangers.
Flanges for Heat Exchanger
Ensures secure connection and pressure sealing through precision-engineered flanges for heat exchangers.
tube bundle for Heat Exchanger
Engineered for precision and performance — our tube bundles ensure secure tube alignment and maximize heat transfer efficiency in every heat exchanger.
High-Performance Stainless Steel Tubes for Heat Exchanger Applications
Product Cases
ASTM B151 C70600 Weld Neck Flange
ASTM B151 C70600 Weld Neck Flange (WNRF), 4″ SCH80, 150#, ASME B16.5. CuNi 90/10 alloy with excellent seawater corrosion resistance, ideal for marine, desalination, and offshore piping systems.
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ASTM A269/A213 TP316/316L Seamless Tube 4×0.5MW×6000MM
ASTM A269/A213 TP316/316L seamless tube, 4×0.5×6000MM, bright annealed surface, used in shipyards, marine systems, heat exchangers, and condensers.
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ASTM A213 TP304 Bright Annealed Seamless
ASTM A213 TP304 seamless bright annealed tube, ∅19×2.0×12000mm, with 100% HT + 100% ET + 100% UT. High-quality stainless steel tube for oil refinery and heat exchanger applications.
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ASTM A213/ASME SA213 TP321 (1.4541) Seamless
ASTM A213/ASME SA213 TP321 (1.4541) seamless tube, 10×0.5×1325MM, bright annealed surface. Titanium-stabilized stainless steel tube for heat exchangers, boilers, and petrochemical applications.
Read MoreDLSS Partners
Jn S***h
As a heat exchanger manufacturer, we often face urgent orders from our customers. In one particular project, we had an extremely tight deadline and struggled to find stainless steel tubes that met our specifications. DLSS responded quickly, arranged production in record time, and coordinated the best logistics plan to ensure on-time delivery. Their efficiency and professionalism left a lasting impression on us, and we look forward to a long-term partnership with DLSS!
Mk B***r
Our heat exchanger products operate under high pressure and high temperatures, requiring stainless steel tubes with exceptional precision and corrosion resistance. The materials supplied by DLSS not only met our strict technical requirements but even exceeded our expectations. With their rigorous quality control and reliable management, they helped us maintain product stability and gain the trust of our end customers. DLSS is a partner we can truly rely on!
Aa D***s
One of our heat exchanger designs required stainless steel tubes in non-standard dimensions, which were difficult to source in the market. After discussing our technical requirements, DLSS quickly adapted their production process and delivered tubes that precisely met our specifications. Their flexibility and expertise ensured the smooth launch of our product. DLSS stands out as a top-tier supplier in the industry!
Ty W***n
During one of our production runs, we encountered issues with the weldability of a batch of raw materials, which posed a risk to our final product quality. The technical team at DLSS promptly stepped in, analyzed the problem, and provided professional recommendations. By optimizing material selection and processing techniques, they helped us completely resolve the issue. DLSS is more than just a supplier—they are a valuable technical partner we can depend on.
John D.*
We have been working with DLSS for years, starting with small-volume purchases and gradually expanding to large-scale collaborations. Every time, we experience their professionalism and dedication. Whether it's order adjustments, quality control, or urgent deliveries, DLSS consistently provides the best solutions, helping our business grow steadily. A supplier like DLSS is not just reliable but truly indispensable for long-term success!
From Every Part of The tube...
We care about the quality of stainless steel tubes. That’s why we focus on every detail of every component to ensure durability, precision, and superior performance.
Ensures material accuracy and dimensional precision through chemical composition testing (verified by PMI and spectrometer) and size measurement (including OD, WT, length, and pipe end).
Ensures dimensional accuracy and proper fit through ring gauge testing.
Ensures strength and leak-proof performance under specified pressure conditions through hydrostatic testing.
Ensures detection of surface cracks and defects through Penetrant Testing (PT).
Ensures internal surface quality and detects internal defects through borescope (endoscope) inspection.
Ensures surface quality and detects external defects through external surface inspection.
Dedicated Support for Seamless Integration
Accurate ordering
Accurately and clearly, we input all order details, including the customer's special requirements, into our internal system to prevent any errors after production is scheduled.
Production Control
Each order is assigned a unique tracking number to ensure meticulous management, with every stage strictly recorded and signed for full traceability. Comprehensive inspections, including HT, ET, UT, RT, and PT, are conducted to guarantee superior performance and quality.
After-sales service
Responsive After-Sales Service, Offering Free Exchange or Replenishment of Your Stainless Steel Tubes to Ensure High-Quality Heat Exchanger Installation and Timely Order Fulfillment.
Technical Support
Technical support is provided promptly via phone, email, and online chat to efficiently address your technical issues and inquiries.
In-Depth FAQs: Solving Your Heat Exchanger Tube Problems
What's your Min Order Quantity (MOQ)?
1PC. (Except for the special material and size)
What's your delivery?
5~60 Days. (Depends on products and quantity)
How do you ensure good quality?
Each order production finished we arrange double Inspection and submit all photos and videos for client’s approval. Besides, we accept Third Party Inspection before shipment.
How about your payment term?
T/T or LC at sight. (Deposit is required)
Can you provide FREE sample?
Yes. (If special material or size, let’s discuss in detail)
How long is the warranty period?
Normally three years. (Negotiable)
Company News
Copper Nickel ASTM B111 C70600(O61) Seamless
Product Overview – ASTM B111 C70600 (O61) Copper-Nickel Low Finned Tube The ASTM B111 C70600 (90/10 Cu-Ni) seamless low-finned tube, in O61 annealed temper, is designed for oil cooler systems, marine heat exchangers, and condenser units. With integrally formed spiral fins, it increases thermal transfer area—critical for high-performance systems in ship cooling, industrial chillers, and power generation plants. Technical Specifications Chemical & Mechanical Properties […]
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Choosing Between 304L, 316L, and 317L
Introduction When selecting stainless steel tubes for industrial use, choosing the right grade can significantly affect corrosion resistance, mechanical performance, and cost efficiency. Among the most widely used austenitic stainless steels are 304L, 316L, and 317L. Though they may appear similar, their chemical makeup and performance differ greatly in environments like chemical processing, marine applications, […]
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Nickel Alloys vs Stainless Steel Tubes
Introduction In critical industries like oil & gas, chemical processing, power generation, and aerospace, choosing between stainless steel tubes and nickel alloy tubes can be the deciding factor in system reliability and longevity. This article explains the differences in composition, corrosion resistance, heat resistance, and cost between these two families of materials, helping you make […]
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Why High-Performance Grades Like 904L, 2205,
As industrial applications become more extreme—whether due to high chloride content, elevated temperatures, or corrosive media—the demand for high-alloy stainless steel seamless tubes is rising sharply. Materials such as 904L, 2205 duplex, and 2507 super duplex are seeing significant adoption across oil & gas, chemical processing, desalination, and offshore energy sectors. According to recent reports, […]
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