Introduction
The ASTM A213/ASME SA213 TP321 (1.4541) Seamless Tube is a titanium-stabilized austenitic stainless steel tube widely applied in heat exchangers, boilers, and high-temperature piping systems. The addition of titanium (Ti) improves resistance to intergranular corrosion after welding and enhances creep strength at elevated service conditions.
DLSS supplies 10×0.5MW×1325MM seamless tubes, manufactured with a Bright Annealed (BA) surface for a smooth, oxide-free finish that improves cleanliness, corrosion resistance, and thermal efficiency in heat transfer systems.
Key Features
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Material: Stainless Steel TP321 (1.4541, UNS S32100)
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Standard: ASTM A213 / ASME SA213
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Type: Seamless Tube (SMLS)
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Size: 10 mm OD × 0.5 mm WT × 1325 mm Length
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Manufacturing: Minimum Wall (MW) precision
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Surface Finish: Bright Annealed (BA)
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Application: Heat exchangers, boilers, petrochemical plants, power generation
Specifications
| Item | Details |
|---|---|
| Standards | ASTM A213 / ASME SA213 |
| Material | TP321 Stainless Steel (1.4541, UNS S32100) |
| Type | Seamless Tube |
| Size | 10×0.5 MW × 1325MM |
| Surface Finish | Bright Annealed |
| Applications | Heat Exchangers, Boilers, Chemical Processing, Power Generation, Refineries |
Advantages of TP321 (1.4541)
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Titanium Stabilization – prevents carbide precipitation and intergranular corrosion.
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High Temperature Strength – stable up to 870°C (1600°F) in continuous service.
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Oxidation Resistance – performs well in cyclic heating conditions.
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Bright Annealed Finish – ensures smooth surface, reduces fouling, and improves fluid flow.
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Durability – long service life in heat exchanger and boiler environments.
Applications
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Heat Exchangers – effective for high-temperature fluids and gases.
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Boilers & Superheaters – resistant to oxidation and stress rupture.
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Petrochemical Industry – refinery piping and catalytic equipment.
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Power Plants – condenser tubes and high-temperature piping systems.
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Industrial Furnaces – piping exposed to elevated heat cycles.
Quality Assurance
DLSS ensures compliance with international standards through:
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Bright Annealed Processing for oxide-free finish.
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Dimensional Accuracy – tight tolerance control for precision assembly.
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PMI Testing – verifies chemical composition.
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NDT (ET/UT) – available for defect detection.
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Third-Party Inspection – SGS, BV, TUV, LR certifications available.
FAQ
Q1: Why use TP321 instead of TP304/316?
A1: TP321 includes titanium stabilization, which enhances weldability and prevents intergranular corrosion in high-temperature services.
Q2: What is the benefit of Bright Annealed finish?
A2: It provides a smooth, reflective, oxide-free surface that improves corrosion resistance and cleanliness, critical for heat exchanger use.
Q3: What does MW mean?
A3: MW (Minimum Wall) means the tube wall thickness is guaranteed to meet or exceed 0.5 mm at all points, ensuring safety in high-pressure and high-temperature applications.
Why Choose DLSS?
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30+ years’ experience in manufacturing stainless steel seamless tubes.
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Global references in shipyards, refineries, power plants, and EPC projects.
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Strict QC with PMI, HT, NDT, and hydro tests for guaranteed performance.
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Seaworthy packaging with PE caps, plastic wrap, and wooden cases.
