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Stainless Steel Pipes | TP 310S/347H Furnace Exhaust Solutions

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Quantity 1 - 49 tons 50 - 999 tons >= 1000 tons

Thickness 1-50mm

Stainless Steel Pipes | TP 310S/347H Furnace Exhaust Solutions

Product Specifications

Engineered for extreme heat and corrosion resistance, our stainless steel exhaust pipe systems are AD 2000-certified and optimized for industrial furnace, boiler, and high-temperature exhaust applications.

Property	TP 310S	TP 347H	Reference Standards
Outer Diameter (mm)	38–600	10–762	ASTM A312, EN 10216-5
Wall Thickness (mm)	1.5–40	1–100	ASME SA213, DIN 17456
Hardness (HV)	150–217 HBW	≤289 HBW	ISO 6507, ASTM E384
Tensile Strength (MPa)	515–720	≥530	AD 2000 W0/TRD 100
Yield Strength (MPa)	205–274	≥205	NACE MR0175
Elongation (%)	40–61	≥40	PED 2014/68/EU
Surface Finish	Pickled, Annealed, Polished	Bright Annealed, Pickled	ASTM A480
Certifications	ISO 9001, TÜV, PED	ISO 9001, ASME, TÜV	ASME Section VIII

Key Attributes

Material Composition
- TP 310S (UNS S31008): 24–26% Chromium, 19–22% Nickel, ≤0.08% Carbon.
- TP 347H (UNS S34709): 17–19% Chromium, 9–13% Nickel, Niobium-stabilized.
- Both grades outperform conventional 2 stainless steel pipe in oxidation resistance above 800°C.
Applications
- stainless steel exhaust pipe: Ideal for industrial furnaces, annealing lines, and burner systems (service up to 1,150°C).
- stainless steel pipes and fittings: Customized for petrochemical reactors, power plants, and marine exhausts requiring creep resistance.
- Seamless solutions for 2 stainless steel pipe diameters (38–600mm) in HVAC and structural supports.
Manufacturing Process
- Seamless Pipes: Hot extrusion and cold drawing for precision tolerances (±0.1mm).
- Welded Pipes: High-frequency induction welding (HFIW) with argon shielding.
- Post-weld heat treatment (PWHT) at 1,040–1,120°C to eliminate sensitization risks.

Technical Performance

Tensile & Bend Strength

TP 310S: Tensile strength of 515–720 MPa ensures structural stability in cyclic thermal loads. Its elongation (40–61%) prevents cracking during bending radii of 1.5× pipe diameter.
TP 347H: Niobium stabilization enhances creep-rupture strength at 871°C (1,600°F), with yield strength ≥205 MPa for high-pressure steam pipelines.

Weight Calculation Formula

Calculate pipe weight (kg/m) using:
$Weight = \frac{( O D - W T ) \times W T \times 0.02491}{1000}$
Example: A 150mm OD, 6mm WT TP 347H pipe weighs 21.6 kg/m.

Identification Marking

Pipes are laser-etched with:

Grade (e.g., UNS S31008/S34709)
Heat number and AD 2000 certification code.

Why Does Stainless Steel Rust?

Despite high corrosion resistance, localized rust may occur due to:

Chloride Exposure: Coastal environments or de-icing salts accelerate pitting in non-stabilized grades like 304.
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 TP 310S.
Welding Defects: Improper PWHT in TP 347H may cause chromium carbide precipitation.

Prevention Strategies:

Use insulating stainless steel pipes and fittings to avoid galvanic contact.
Select TP 347H for chloride-rich or acidic environments.
Regular passivation with nitric acid to restore oxide layers.

Why Choose Our Stainless Steel Pipes?

Certified Excellence: AD 2000, ASME, and PED compliance with third-party inspections.
Custom Solutions: Tailored 2 stainless steel pipe diameters (10–2,500mm) and SCH 5S–XXS thicknesses.
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 | TP 310S/347H Furnace Exhaust Solutions