others (Sheets, tube sheets, round bars...)
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What Makes Our Stainless steel productsStand Out for you?
Every production step is carefully monitored, from raw material sourcing to final inspection, with complete traceability for each batch.
With more than three decades of expertise in stainless steel seamless pipes, DLSS has earned the trust of customers worldwide through consistent quality and reliable service.
Our products are trusted by customers across Europe, Southeast Asia, the Middle East, South America, and beyond, supporting well-known international brands.
DLSS is committed to helping customers succeed. We believe in sincere cooperation, mutual benefit, and long-term partnerships that grow together.
Product Cases
ASTM A213/ASME SA213 TP321 (1.4541) Seamless
ASTM A213/ASME SA213 TP321 (1.4541) seamless tube, 18×1.0×1375MM, bright annealed surface. Titanium-stabilized stainless steel tube for heat exchangers, boilers, and petrochemical plants.
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ASTM A403 WP316L Stub End SMLS
ASTM A403 WP316L seamless stub end, DN150/DN100, SCH80S, Lap Joint Type A. Stainless steel with excellent corrosion resistance for oil, gas, marine, and chemical applications.
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ASTM A789 S32750 Super Duplex Seamless
ASTM A789 S32750 super duplex seamless tube, 19×2.4mm, bright annealed finish – high strength, superior corrosion resistance.
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ASME SA815 WPS32750 Equal Tee SMLS
ASME SA815 WPS32750 Equal Tee, seamless DN150 SCH10S, manufactured to ASME B16.9. Super duplex stainless steel with high strength and excellent corrosion resistance for offshore, oil & gas, and chemical plants.
Read MoreDifferentiated Services: Precisely Meeting Your Business Needs
for Stockists
for End Users
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Fast Delivery
Efficient production and on-time delivery for your orders
Multiple Product Options
A wide range of seamless tubes to meet various project needs
Small Batch Logo Customization
Custom logos for small batch orders, enhancing your brand identity
Regional Pricing & Protection
Exclusive regional rights and strategic pricing to strengthen your market position
Cost-Effective Products
High-quality products at competitive prices to boost your margins
Flexible MOQ
Adaptable minimum order quantities to fit your business requirements
One-Stop Marketing Solutions
Boost your online image with a complete suite of product marketing visuals and videos
Fastest 7-Day Production Process
Delivery can be made within a minimum of 7 days based on your order size
Continuously upgraded packaging
We offer continuously upgraded packaging to ensure maximum protection and efficiency.
DLSS’s Core Principle: Never Leaving Problems For Clients
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Company News
ASTM A213 vs A269: What’s the
Introduction Two of the most frequently specified standards for stainless steel tubing are ASTM A213 and ASTM A269. Both cover austenitic stainless steel tubes like TP304L, TP316L, and TP321. However, their scope, tolerances, and test requirements differ significantly—especially for heat exchanger and pressure service applications. This article provides a clear, side-by-side comparison to help you […]
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Corrosion-Resistant Heat Exchanger Tubes: When to
In highly corrosive environments—such as seawater cooling, chemical processing, and offshore oil and gas—traditional stainless steel may not offer sufficient durability. Selecting the right material for heat exchanger tubes in these conditions is crucial for ensuring long service life, process safety, and reduced maintenance costs. This article explores two high-performance materials: Titanium and Nickel Alloy […]
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How to Select Heat Exchanger Tubes:
Introduction Heat exchanger tubes are the most critical components in shell and tube heat exchangers. They directly determine the heat transfer efficiency, corrosion resistance, and operational reliability of the entire system. Selecting the wrong tube material can result in serious issues such as: For engineers and procurement specialists, understanding how to properly select heat exchanger […]
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5 Key Factors to Choose the
Introduction Choosing the right stainless steel heat exchanger tube is critical to ensuring long-term performance, safety, and efficiency—especially in industries like petrochemical, power generation, and marine engineering. At DLSS, we’ve supported projects in over 35 countries and understand what matters most when it comes to tube selection. In this article, we’ll share 5 key factors every engineer, […]
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