ASME B16.5 A182 F347 Flange

ASME B16.5 A182 F347 Flange is a type of flange made from 347 stainless steel, conforming to the ASME B16.5 standard. It is an austenitic stainless steel that contains chromium (18-20%), nickel (9-13%), and titanium (Ti), which provides enhanced resistance to intergranular corrosion, especially after welding.

150# a105 weld neck flange

High Quality ASME B16.5 A182 F347 Flange

  • Pressure Rating: ASME B16.5 flanges are available in pressure classes 150, 300, 600, 900, 1500, and 2500.
  • Size Range: Flanges are typically available from 1/2″ to 24″ in diameter.
  • Standard: The flange follows ASME B16.5 specifications for bolt holes, dimensions, and tolerances.
  • Temperature Range: Suitable for temperatures up to 870°C.
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ASME B16.5 A182 F347 Flange

The ASME B16.5 standard covers various flange designs, including:

Material Properties (ASTM A182 F347)

PropertyCarbon Content (C)Chromium (Cr)Nickel (Ni)Titanium (Ti)Tensile StrengthYield StrengthElongationDensityMelting PointMagnetic Properties
F347≤0.08%18–20%9–13%5×C to 0.70%≥515 MPa≥205 MPa≥40%7.90 g/cm³1375°C – 1400°CNon-magnetic

Selection Recommendations

  • High-temperature applications: F347 flanges are recommended for temperatures above 500°C.
  • Corrosion-resistant applications: Use F347 for environments requiring intergranular corrosion resistance, especially where welding is involved.
  • Cost-sensitive applications: For lower-cost solutions, F304 or F316 flanges may be alternatives, but F347 should be preferred for high-temperature environments or those involving aggressive chemicals.

Production, Processing, and Usage Considerations

Welding:

  • F347 requires careful control during welding due to the presence of carbon, which can lead to carbide precipitation in the heat-affected zone. Titanium stabilizes this effect, but it’s important to follow proper procedures.
  • Post-weld heat treatment (solution annealing) is recommended to ensure the integrity of the material’s properties.

Corrosion Protection:

  • F347 is highly resistant to intergranular corrosion, especially when exposed to welding. It is resistant to many chemicals but should be avoided in environments containing strong reducing acids like concentrated hydrochloric acid.

Machining:

  • F347 is harder than common grades like F304 or F316, so carbide tools should be used for cutting and machining.
  • It requires slower machining speeds and more frequent tool changes due to its hardness.

Typical Applications

F347 flanges are widely used in high-temperature environments such as:

  • Aerospace: Aircraft components exposed to high-temperature environments.
  • Chemical Processing: In reactors, heat exchangers, and piping systems.
  • Petrochemical: Boilers, furnace components, and other high-temperature systems.
  • Power Generation: Steam pipes and other components exposed to high pressure and temperature.
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One-Stop ASME B16.5 A182 F347 Flange Provider for All Your Needs

SSM has significant product advantages in manufacturing ASME B16.5 A182 F347 Flange. Whether it’s quality or price, we will meet your needs.

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More Information about ASME B16.5 A182 F347 Flange

ASME B16.5 A182 F347 Flange is a type of flange made from 347 stainless steel, conforming to the ASME B16.5 standard. It is an austenitic stainless steel that contains chromium (18-20%), nickel (9-13%), and titanium (Ti), which provides enhanced resistance to intergranular corrosion, especially after welding. This material is suitable for high-temperature applications and environments where resistance to carbide precipitation and oxidation is required.

 

Advantages and Disadvantages Analysis

AdvantagesDisadvantages
– Excellent resistance to intergranular corrosion, especially after welding.– Higher cost compared to 304 or 316 stainless steel.
– Good high-temperature strength and oxidation resistance.– Not suitable for extreme low-temperature applications (cryogenic).
– Resistant to sulfuric acid, nitric acid, and other aggressive chemicals.– Needs special attention to welding procedures to maintain corrosion resistance.

 

Pressure–Temperature Ratings for A182 Gr.347

Comparison with Other Materials

MaterialF347F304/F304LF316/F316L
High-Temperature PerformanceExcellent, up to 870°CModerate (up to 800°C)Excellent, up to 800°C
Intergranular Corrosion ResistanceExcellent (due to Ti addition)Moderate (not resistant to intergranular corrosion)Good (but less resistant than F347)
CostHighLower than F347Higher than F304 but lower than F347
WeldabilityExcellent (with proper welding procedures)Excellent (no intergranular corrosion post-welding)Excellent (especially F316L for welding)

 

FAQ

  • No, F347 is not ideal for cryogenic applications. For low-temperature applications, consider using alloys such as Inconel 625 or 304L stainless steel.

Yes, post-weld heat treatment is recommended to remove any residual stresses and to ensure the material retains its corrosion resistance and mechanical properties after welding.

  • F347 has better resistance to intergranular corrosion due to the addition of titanium, especially after welding, compared to F316, which may require additional treatments to prevent such issues.
  • Industries such as aerospace, petrochemical, chemical processing, and power generation often use F347 flanges due to their excellent high-temperature and corrosion resistance properties.

F347 can handle seawater but is not the best choice for this application due to the risk of pitting and crevice corrosion. For seawater, F316L or super duplex steels may be more suitable.

For further details or technical assistance, please provide your specific operational conditions, such as medium type, temperature, and pressure, as well as any required certifications.

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