Introduction
The ASME SA213 TP304 Seamless Tube is one of the most widely used stainless steel tubes for heat exchangers, condensers, and boilers. As a classic 18/8 austenitic stainless steel (18% Cr, 8% Ni), TP304 offers an excellent balance of strength, corrosion resistance, and cost efficiency, making it suitable for diverse industrial applications.
DLSS supplies 25 mm OD × 1.0 mm minimum wall × 6000 mm length tubes, manufactured to ASME SA213. Each tube undergoes 100% Heat Treatment (HT), 100% Eddy Current Testing (ET), and 100% Ultrasonic Testing (UT), ensuring reliability and safety in critical heat exchanger service.
Key Features
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Material: TP304 Stainless Steel (UNS S30400 / 1.4301)
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Standard: ASME SA213
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Type: Seamless Tube (SMLS)
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Size: ∅25 mm OD × 1.0 mm min WT × 6000 mm Length
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Testing: 100% HT + 100% ET + 100% UT
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Corrosion Resistance: Good resistance in oxidizing and mildly corrosive environments
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Application: Heat Exchangers, Boilers, Power Plants, Chemical Processing
Specifications
| Item | Details |
|---|---|
| Standard | ASME SA213 |
| Material | TP304 Stainless Steel (18Cr-8Ni) |
| Type | Seamless Tube |
| Size | 25×1.0(min)×6000 mm |
| Testing | 100% HT + 100% ET + 100% UT |
| Applications | Heat Exchangers, Boilers, Refinery Units, Condensers, Marine Systems |
Advantages of TP304
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Corrosion Resistance – suitable for a wide range of media including water, steam, and mild chemicals.
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Good Weldability & Formability – easy to fabricate and integrate into heat exchanger bundles.
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Reliable Testing – ET + UT ensure detection of both surface and internal defects.
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Heat Treatment Stability – prevents stress cracking and ensures durability.
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Cost-Effective – compared with high-alloy steels, TP304 provides an economical solution.
Applications
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Heat Exchangers & Condensers – widely used in power plants and chemical plants.
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Boilers & Superheaters – reliable performance under temperature cycling.
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Petrochemical Industry – refinery piping and processing units.
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Marine Engineering – general seawater cooling applications (non-aggressive service).
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Food & Beverage Industry – hygienic processing lines due to clean surface finish.
Quality Assurance
DLSS provides strict inspection and testing:
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100% HT – ensures stable mechanical properties.
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100% ET – detects surface cracks and pinholes.
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100% UT – detects internal defects.
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PMI & Dimensional Testing – verify grade and tolerances.
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Third-Party Inspection – SGS, BV, TUV, LR available upon request.
FAQ
Q1: What’s the difference between TP304 and TP304L?
A1: TP304L has lower carbon, improving weldability and resistance to sensitization; TP304 is stronger at higher temperatures.
Q2: Why both ET and UT testing?
A2: ET (Eddy Current) detects surface flaws, while UT (Ultrasonic) detects subsurface/internal defects – providing full integrity assurance.
Q3: Can TP304 be used in seawater?
A3: TP304 is suitable for mild marine service, but for aggressive chloride conditions, duplex or TP316L is recommended.
Why Choose DLSS?
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30+ years of manufacturing expertise in seamless stainless tubes.
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Comprehensive testing (HT, ET, UT) ensures safe use in heat exchangers.
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Global supply references with EPCs, refineries, and power plants.
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Seaworthy packaging with PE caps, plastic wrap, and wooden cases.
