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Stainless Steel Pipes | Hydraulic-Tested 316ti/347H Reliability

Stainless Steel Pipes | Hydraulic-Tested 316ti/347H Reliability

$1,360.00 SGD
$1,360.00 SGD
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Stainless Steel Pipes | Hydraulic-Tested 316Ti/347H Reliability

Product Specifications

Engineered for extreme environments, our stainless steel pipes combine hydraulic-tested reliability with precision manufacturing for industrial excellence.

Property 316Ti 347H SS 304 (Reference)
Outer Diameter (mm) 5–1219.2 6–830 6–530
Wall Thickness (mm) 0.5–20 1–20 0.5–45
Hardness (HV) 200–220 81 HRB 150–220
Tensile Strength (MPa) ≥520 ≥515 515–720
Yield Strength (MPa) ≥205 ≥205 205–310
Elongation (%) ≥40 35% 35–45
Surface Finish Annealed, Pickled, Polished Annealed, Pickled, Bright Annealed 2B, BA, Mirror Polished
Standards ASTM A312, A269, ASME SA213 ASTM A312, A789, EN 10216 ASTM A312, A269

Key Attributes

  1. Material Composition

    • 316Ti (UNS S31635): 16–18% Chromium, 10–14% Nickel, 2–3% Molybdenum, Titanium-stabilized.
    • 347H (UNS S34709): 17–19% Chromium, 9–13% Nickel, Niobium-stabilized for enhanced intergranular corrosion resistance.
    • Both grades outperform stainless steel pipe ss 304 in chloride-rich and high-temperature environments.

  2. Applications

    • stainless steel pipe manufacturer applications: Petrochemical reactors, marine exhaust systems, and heat exchangers.
    • 316Ti: Ideal for acidic media (sulfuric, acetic acids) and marine hardware due to titanium stabilization.
    • 347H: Optimized for boiler tubes, power plants, and environments up to 871°C (1600°F) with superior creep resistance.

  3. Manufacturing Process

    • Seamless Pipes: Hot extrusion and cold drawing for precision dimensions.
    • Welded Pipes: High-frequency induction welding (HFIW) with stainless steel pipe tape-reinforced joints.
    • Post-weld heat treatment (PWHT) and pickling to eliminate sensitization risks.

Technical Performance

Tensile & Bend Strength

  • 316Ti: Tensile strength ≥520 MPa and yield strength ≥205 MPa ensure durability in high-stress marine and chemical environments. Its titanium stabilization prevents carbide precipitation during welding, maintaining structural integrity.
  • 347H: With tensile strength ≥515 MPa and elongation of 35%, it resists creep deformation in power plants operating at 600–800°C.

Weight Calculation Formula

Calculate pipe weight (kg/m) using:

Example: A 100mm OD, 5mm WT 316Ti pipe weighs 11.9 kg/m.

Identification Marking

Pipes are laser-etched with:

  • Grade (e.g., UNS S31635/S34709)
  • Standard (ASTM/EN)
  • Heat number and stainless steel pipe manufacturer certification (ISO 9001, PED).

Why Does Stainless Steel Rust?

Despite inherent corrosion resistance, environmental factors can cause localized rust:

  1. Chloride Exposure: Coastal or de-icing salt environments accelerate pitting in non-stabilized grades like 304.
  2. High-Temperature Oxidation: Prolonged exposure above 800°C degrades chromium oxide layers, leading to scale formation.
  3. Galvanic Corrosion: Contact with carbon steel or copper alloys triggers electrochemical degradation.
  4. Welding Defects: Improper post-weld treatment in 347H may cause chromium carbide precipitation.

Prevention Strategies:

  • Use stainless steel pipe tape for insulation in mixed-metal systems.
  • Select stabilized grades (316Ti/347H) for chloride or high-temperature zones.
  • Regular passivation and pH-neutral cleaning.

Why Choose Our Stainless Steel Pipes?

  1. Certified Excellence: ISO 9001, ASTM, and EN compliance with third-party inspections.
  2. Custom Solutions: Tailored stainless steel pipe diameters (5mm–2.5m) and wall thicknesses.
  3. Global Logistics: Warehouses in Shanghai, Rotterdam, and Houston ensure 10–25-day delivery.
  4. Technical Support: 24/7 engineering guidance for stainless steel pipe ss 304 upgrades or 316Ti/347H integration.
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