Seamless Tp347h Stainless Steel Pipe Bends For High-pressure Boiler And Petrochemical Applications
Astm a213 tp347h pipe bending solutions, crafted from stabilized stainless steel, designed for superior corrosion resistance and high-temperature performance in boilers, petrochemical, and chemical processing systems.
Seamless Tp347h Stainless Steel Pipe Bends For High-pressure Boiler And Petrochemical Applications
Astm a213 tp347h pipe bending solutions, crafted from stabilized stainless steel, designed for superior corrosion resistance and high-temperature performance in boilers, petrochemical, and chemical processing systems.
ASTM A213 TP347H Pipe Bending involves forming seamless stainless steel tubes into bends (e.g., 3D, 5D, 7D, or 180° U-bends) for high-pressure, high-temperature applications. ASTM A213 TP347H, an austenitic stainless steel (UNS S34709), contains 17–19% chromium, 9–13% nickel, and columbium (niobium) for stabilization, offering excellent high-temperature strength (up to 870°C) and superior corrosion resistance. Compliant with ASTM A213/ASME SA213 standards, these bends are ideal for boiler pipeline protection in power generation, petrochemical, and chemical processing industries.
Manufactured through hot induction bending or cold drawing with solution annealing (1040–1100°C, water quenched), TP347H pipe bends are available in sizes from 1/8" (3.18mm) to 5" (127mm) outer diameter, with wall thicknesses from 0.4mm to 12.7mm, and bend radii of 3D, 5D, 7D, or custom. They exhibit tensile strength (≥515 MPa), yield strength (≥205 MPa), elongation (≥35%), and hardness (≤192 HB), ensuring durability in harsh environments.
TP347H pipe bends offer excellent weldability without sensitization due to niobium stabilization, which prevents intergranular corrosion in high-temperature settings. Rigorous testing, including chemical analysis, tensile testing, flattening tests, and nondestructive methods (radiographic, ultrasonic, PMI), ensures quality. The high chromium and nickel content forms a passive oxide layer, enhancing corrosion resistance, while coatings like passivation or FBE further protect against chemical exposure.
With a density of approximately 7.96 g/cm³ and thermal conductivity of ~16 W/(m·K) at 20°C, TP347H pipe bends are ideal for high-pressure boilers (pressure ≥9.8 MPa, temperature up to 870°C), superheaters, reheaters, and heat exchangers. Their smooth interior surfaces reduce flow resistance, making them suitable for boiler pipeline protection, refinery piping, cooling coils, and structural applications like handrails and frames.
For engineers seeking robust high-temperature piping solutions, ASTM A213 TP347H pipe bends provide exceptional erosion resistance, corrosion resistance, and longevity, addressing challenges like pipeline corrosion and thermal stress in demanding industrial environments.
| Specification | Details |
|---|---|
| Standards | ASTM A213, ASME SA213, EN 10216-5 |
| Material | TP347H (UNS S34709, Austenitic Stainless Steel) |
| Sizes | 1/8" (3.18mm) to 5" (127mm) Outer Diameter |
| Wall Thickness | 0.4mm to 12.7mm |
| Bend Radius | 3D, 5D, 7D, or Custom |
| Angles | 90°, 45°, 30°, 180° (U-Bends), or Custom |
| Manufacturing | Hot Induction Bending, Cold Drawing, Solution Annealing |
| Heat Treatment | Solution Annealed (1040–1100°C, Water Quenched) |
| Coatings | Passivation, FBE |
| Testing | Chemical Analysis, Tensile (≥515 MPa), Flattening, Radiographic, Ultrasonic, PMI |
| Mechanical Properties | Tensile: ≥515 MPa, Yield: ≥205 MPa, Elongation: ≥35%, Hardness: ≤192 HB |
| Operating Conditions | Pressure: ≥9.8 MPa, Temperature: Up to 870°C |
Chromium-nickel passivation and FBE coatings protect against chemical corrosion.
Smooth bends minimize turbulence and wear in high-flow systems.
Reliable at up to 870°C for boiler and petrochemical applications.
Niobium stabilization prevents intergranular corrosion during welding.
Stabilized alloy ensures long-term durability in high-temperature environments.
Larger radii reduce pressure loss in high-flow systems.
| Feature | ASTM A213 TP347H | ASTM A210 Grade C | 12Cr1MoVG Alloy Steel | ASTM A213 T91 |
|---|---|---|---|---|
| Temperature Range | Up to 870°C | Up to 425°C | 450°C–580°C | 450°C–600°C |
| Tensile Strength | ≥515 MPa | ≥485 MPa | ≥470 MPa | ≥585 MPa |
| Corrosion Resistance | Excellent (Cr-Ni passivation) | Moderate (with coatings) | High (Cr, V oxide layer) | High (Cr oxide film) |
| Creep Resistance | Moderate (Niobium stabilized) | Poor | Good (V content) | Excellent (V, Nb) |
| Applications | Boilers, petrochemical, chemical | Boilers, heat exchangers | Boilers, petrochemical | USC boilers, petrochemical |
| Weldability | Excellent (no sensitization) | Good | Good (care for thick walls) | Complex (requires preheating) |
| Key Advantage | Superior corrosion resistance | Cost-effective for boilers | Balanced strength and corrosion | Creep and high-temperature strength |
A curated list of long-tail keywords for ASTM A213 TP347H pipe bends, covering diverse bending applications, specifications, and material properties.
Note: ASTM A213 TP347H pipe bends are engineered for high-temperature, corrosion-resistant piping in critical industrial applications. Contact a certified supplier for detailed specifications.
| Element | Content Range (%) |
|---|---|
| Carbon (C) | 0.04–0.10 |
| Manganese (Mn) | ≤2.00 |
| Silicon (Si) | ≤1.00 |
| Phosphorus (P) | ≤0.045 |
| Sulfur (S) | ≤0.030 |
| Chromium (Cr) | 17.0–19.0 |
| Nickel (Ni) | 9.0–13.0 |
| Niobium (Nb) | 8×C–1.10 |
Note: Niobium is added for stabilization to reduce carbide precipitation and enhance resistance to intergranular corrosion.
| Property | Value |
|---|---|
| Tensile Strength, min | ≥515 MPa (≥75 ksi) |
| Yield Strength (0.2% offset), min | ≥205 MPa (≥30 ksi) |
| Elongation (in 50 mm), min | ≥35% |
| Hardness (Brinell, HBW), max | 201 |
| Hardness (Rockwell B, HRB), max | 95 |
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1400–1450°C (2552–2642°F) |
| Thermal Expansion Coefficient (20–100°C) | 16.6 μm/m·°C |
| Thermal Conductivity (100°C) | 15 W/m·K |
| Specific Heat Capacity (20°C) | 500 J/kg·K |
Radius is three times the nominal diameter. Compact design for space-limited applications.
Radius is five times the nominal diameter. Optimal balance of flow and space requirements.
Radius is ten times the nominal diameter. Maximum flow efficiency with minimal pressure drop.
For a 10-inch diameter pipe with a 5D bend:
Centerline Radius = 5 × 10 inches = 50 inches
The radius calculation helps determine the space requirements and flow characteristics of the bend.
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