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Stainless Steel Pipes | AD 2000-Certified 304/316L Systems

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Quantity 1 - 29 tons 30 - 99 tons >= 100 tons

Thickness 1-50mm

Stainless Steel Pipes | AD 2000-Certified 304/316L Systems

Product Specifications

Engineered for extreme reliability, our stainless steel pipe systems meet AD 2000 standards for pressure equipment, ensuring compliance with global industrial safety regulations.

Property	304	316L	Reference Standards
Outer Diameter (mm)	6–610	6–860	ASTM A312, EN 10216-5
Wall Thickness (mm)	0.5–45	1–60	ASME SA213, DIN 17456
Hardness (HV)	150–220	160–210	ISO 6507, ASTM E384
Tensile Strength (MPa)	515–720	485–620	AD 2000 W0/TRD 100
Yield Strength (MPa)	205–310	170–300	PED 2014/68/EU
Elongation (%)	35–45	40–50	NACE MR0175
Surface Finish	2B, BA, Mirror Polished	Pickled, Bright Annealed	ASTM A480
Certifications	ISO 9001, PED, TÜV	ISO 9001, PED, TÜV	ASME Section VIII

Key Attributes

Material Composition
- 304 (UNS S30400): 18–20% Chromium, 8–10.5% Nickel, ≤0.08% Carbon.
- 316L (UNS S31603): 16–18% Chromium, 10–14% Nickel, 2–3% Molybdenum, ≤0.03% Carbon.
- Enhanced resistance to chloride-induced pitting and crevice corrosion in 316L due to molybdenum.
Applications
- stainless steel pipe fittings: Ideal for chemical processing, marine exhausts, and pharmaceutical pipelines.
- stainless steel pipe clamps: Used in HVAC, oil/gas pipelines, and structural supports for vibration resistance.
- Customizable diameters (6mm–2.5m) for boilers, heat exchangers, and potable water systems.
Manufacturing Process
- Seamless Pipes: Hot extrusion followed by cold drawing for precision tolerances (±0.1mm).
- Welded Pipes: High-frequency induction welding (HFIW) with argon shielding for oxide-free joints.
- Post-weld heat treatment (PWHT) at 1,040–1,120°C to eliminate sensitization risks.

Technical Performance

Tensile & Bend Strength

304: Tensile strength of 515–720 MPa ensures durability in food processing and architectural frameworks.
316L: Yield strength of 170 MPa and elongation up to 50% provide superior ductility for stainless steel pipe clamps in seismic zones.

Weight Calculation Formula

Calculate pipe weight (kg/m) using:
$Weight = \frac{( O D - W T ) \times W T \times 0.02491}{1000}$
Example: A 100mm OD, 5mm WT 316L pipe weighs 11.9 kg/m.

Identification Marking

Pipes are laser-etched with:

Grade (e.g., UNS S31603/S30400)
Heat number and AD 2000 certification code.

Why Does Stainless Steel Rust?

Despite its corrosion resistance, stainless steel may rust under specific conditions:

Chloride Exposure: Coastal environments or de-icing salts accelerate pitting in 304 grades.
Galvanic Corrosion: Contact with carbon steel or copper alloys triggers electrochemical degradation.
High-Temperature Oxidation: Prolonged exposure above 800°C degrades chromium oxide layers in 304.
Welding Defects: Improper PWHT in 316L may cause chromium carbide precipitation.

Prevention Strategies:

Use stainless steel pipe clamps with insulating sleeves to avoid galvanic contact.
Select 316L for chloride-rich or acidic environments.
Regular passivation with nitric acid to restore oxide layers.

Why Choose Our Stainless Steel Pipes?

AD 2000 Compliance: Certified for pressure equipment in EU and ASME markets.
Custom Solutions: Tailored stainless steel pipe fittings and clamps for complex installations.
Global Logistics: Warehouses in Shanghai, Houston, and Rotterdam ensure 7–15-day delivery.
Lifetime Warranty: 25-year guarantee against corrosion and material defects.

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Stainless Steel Pipes | AD 2000-Certified 304/316L Systems