ASTM A182 ASME SA182 F347L Weld Neck RF Forged Flange For Supercritical Boilers
ASTM A182 ASME SA182F347L Weld Neck RF Forged Flange
Description
ASTM A182 F347 Weld Neck Flange is a high-performance butt-welded flange made of austenitic stainless steel (UNS S34700). It complies with the ASTM A182 high-temperature forging standard and the ASME B16.5 dimensional specification. It has excellent high-temperature oxidation resistance, intergranular corrosion resistance and high mechanical strength.
It is widely used in petrochemical, electric power and high-temperature steam pipeline systems. It is suitable for harsh working conditions with pressure levels of Class 150 to 2500. Its long-neck tapered design can effectively disperse stress and ensure sealing reliability under high-pressure environments.
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ASTM A182 F347 Flange Chemical Compostion and Properties
| Element | 347 | 347H |
| Chromium | 17.00 min.-19.00 max. | 17.00 min.-19.00 max. |
| Nickel | 9.00 min.-13.00 max. | 9.00 min.-13.00 max. |
| Carbon | 0.08 | 0.04 min.-0.10 max. |
| Manganese | 2.00 | 2.00 |
| Phosphorus | 0.045 | 0.045 |
| Sulfur | 0.03 | 0.03 |
| Silicon | 0.75 | 0.75 |
| Columbium & Tantalum | 10 x (C + N) min.-1.00 max. | 8 x (C + N) min.-1.00 max. |
| Iron | Balance | Balance |
ASTM A182 F347 Flange Mechanical and Physical Properties
| Yield Strength 0.2% Offset |
Ultimate Tensile Strength |
Elongation in 2 in. |
Hardness | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | (max.) |
| 30,000 | 205 | 75,000 | 515 | 40 | 201 Brinell |
ASTM A182 F347 Flange Physical Properties
| Properties | Metric | Imperial |
| Density | 7.7 – 8.03 g/cm3 | 0.278 – 0.290 lb/in³ |
ASTM A182 F347 Flange Application
Petrochemicals: refinery reactors, hydrogenation units and acidic medium pipeline systems;
Electricity and energy: supercritical boilers, steam turbine high-temperature pipelines and nuclear power equipment;
Chemical processing: strong acid (such as sulfuric acid, nitric acid) storage and transportation pipelines and heat exchangers;
Food and pharmaceuticals: high-temperature sterilization equipment and high-cleanliness fluid systems.
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