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JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect.
GB13296-1991 GB14975-2002 GB14976-2002,ect.
Size:
ND5 - DN400
Length:
6m length or cutting any length as request
Applications:
fluid and gas transport, structure , boiler, heat exchanger, super heater
1. Product Overview
TP304LN stainless steel seamless pipe is a low-carbon (≤0.03%) variant of the classic TP304L alloy, with the addition of nitrogen to enhance mechanical strength and corrosion resistance. This seamless pipe eliminates welded joints, ensuring uniform structure, high pressure resistance, and reliability—making it ideal for demanding industrial and commercial applications. All pipes listed here feature a fixed length of 6m, with nominal diameters (DN) of DN80, DN100, DN150, and DN200, meeting global standards for dimensional accuracy and performance.
2. Key Specifications
The following table details the critical dimensional and material specifications of the TP304LN seamless pipes:
Parameter
Specification (DN80)
Specification (DN100)
Specification (DN150)
Specification (DN200)
Nominal Diameter (DN)
DN80
DN100
DN150
DN200
Outside Diameter (OD)
88.9 mm
114.3 mm
168.3 mm
219.1 mm
Standard Wall Thickness
4.05 mm (Sch 40) / 6.35 mm (Sch 80)
4.57 mm (Sch 40) / 7.11 mm (Sch 80)
5.59 mm (Sch 40) / 8.74 mm (Sch 80)
6.35 mm (Sch 40) / 10.31 mm (Sch 80)
Length
6m (fixed, ±5mm tolerance)
6m (fixed, ±5mm tolerance)
6m (fixed, ±5mm tolerance)
6m (fixed, ±5mm tolerance)
Material Grade
TP304LN (AISI 304LN / UNS S30453)
TP304LN (AISI 304LN / UNS S30453)
TP304LN (AISI 304LN / UNS S30453)
TP304LN (AISI 304LN / UNS S30453)
Surface Finish
Annealed & Pickled (AP) / Bright Annealed (BA)
Annealed & Pickled (AP) / Bright Annealed (BA)
Annealed & Pickled (AP) / Bright Annealed (BA)
Annealed & Pickled (AP) / Bright Annealed (BA)
3. Chemical Composition (ASTM A312/A312M Standard)
TP304LN’s corrosion resistance and mechanical properties are determined by its strict chemical composition, as follows (all values are in weight percentage, wt%):
Element
Minimum Content
Maximum Content
Role
Chromium (Cr)
18.00%
20.00%
Enhances oxidation and general corrosion resistance
Nickel (Ni)
8.00%
12.00%
Improves ductility and resistance to chloride-induced stress corrosion
Carbon (C)
—
0.03%
Low carbon content prevents carbide precipitation (critical for weldability)
Nitrogen (N)
0.10%
0.16%
Boosts tensile strength and hardness without sacrificing ductility
Manganese (Mn)
—
2.00%
Aids in steel melting and improves workability
Silicon (Si)
—
1.00%
Enhances high-temperature oxidation resistance
Phosphorus (P)
—
0.045%
Controlled to avoid brittleness
Sulfur (S)
—
0.030%
Minimized to prevent corrosion and brittleness
4. Mechanical Properties
TP304LN seamless pipes exhibit excellent strength, ductility, and toughness, compliant with ASTM A312/A312M and ASME B36.19 standards:
Property
Test Standard
Minimum Value
Tensile Strength (UTS)
ASTM A370
515 MPa (75 ksi)
Yield Strength (0.2% offset)
ASTM A370
205 MPa (30 ksi)
Elongation (in 50mm)
ASTM A370
35%
Hardness (Brinell)
ASTM E10
≤217 HB
Impact Toughness (Charpy V-notch)
ASTM A370
≥27 J at -196°C (-321°F)
5. Core Performance Advantages
Superior Corrosion Resistance: The Cr-Ni-N alloy system resists general corrosion, pitting, and crevice corrosion in harsh environments (e.g., seawater, acidic/alkaline solutions). Low carbon content eliminates "sensitization" (carbide precipitation) during welding, ensuring post-weld corrosion resistance.
High Mechanical Strength: Nitrogen addition increases tensile strength by ~15-20% compared to TP304L, allowing thinner walls for weight/cost savings while maintaining pressure resistance.
Excellent Ductility & Weldability: Low carbon and high nickel content enable easy forming (bending, flanging) and welding via TIG, MIG, or SMAW processes—no post-weld heat treatment required for most applications.
High-Temperature Stability: Withstands continuous service temperatures up to 870°C (1600°F) and intermittent use up to 925°C (1700°F) without significant oxidation or strength loss.
Chemical & Petrochemical: Reactors, process pipelines, and storage tanks (handles acids, alkalis, and organic solvents).
Water Treatment: Desalination plants, wastewater treatment systems, and potable water pipelines (resists chloride pitting).
Food & Beverage: Dairy processing, brewing, and beverage conveyance (hygienic, easy to clean).
Pharmaceuticals: Pharmaceutical manufacturing equipment and sterile fluid transfer (meets FDA/USP standards).
Power Generation: Boiler feedwater lines, heat exchangers, and turbine systems (high-temperature and pressure resistance).
Construction: Architectural handrails, structural supports, and decorative elements (aesthetic and weather-resistant).
8. Export Packaging & Shipping
To ensure product integrity during international transportation, the pipes are packaged as follows:
Inner Protection: Each pipe is wrapped in PE film to prevent scratches, moisture, and contamination. For bright annealed (BA) pipes, additional VCI (Volatile Corrosion Inhibitor) paper is used to avoid rust.
Bundling: Pipes are bundled into compact packs (10-15 pieces per bundle, depending on DN) using galvanized steel straps (width: 32mm, thickness: 1.2mm) to prevent shifting.
Palletization: Bundles are placed on wooden pallets (heat-treated, ISPM 15-certified) to comply with international phytosanitary requirements (avoids pest infestation).
Outer Cover: Each pallet is covered with a heavy-duty PP woven bag or waterproof tarpaulin to protect against rain, dust, and UV radiation.
Labeling: Clear labels are affixed to each bundle/pallet, including: Product Name (TP304LN Seamless Pipe), DN/OD/Wall Thickness/Length, Material Certificate No., Heat No., Quantity, Weight, and Destination Port.
Shipping: Compatible with container shipping (20ft/40ft containers) or bulk cargo. Loading capacity: ~20-25 tons per 40ft container (varies by DN and wall thickness).
9. Quality Assurance
Every batch of TP304LN seamless pipes undergoes strict quality control:
Incoming material inspection (chemical composition testing via / Spectroscopy).
Hot rolling and cold drawing process monitoring (dimensional accuracy checks).
Annealing and pickling process control (microstructure analysis via metallography).
100% UT and hydrostatic testing.
Final inspection (surface finish, straightness, and dimensional verification).
Material Certificate: Each shipment includes a MTC (Material Test Certificate) per EN 10204 3.1/B, providing full traceability of chemical composition, mechanical properties, and NDT results.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
