Stainless Steel 347H Flanges are high-temperature resistant austenitic stainless steel flanges designed for demanding industrial piping systems and pressure equipment. Steel Icon Stainless Pvt. Ltd. manufactures precision-engineered 347H flanges that meet the strict performance requirements of refineries, petrochemical plants, thermal power stations, and heavy fabrication industries. These flanges are widely used to connect pipes, valves, pumps, and other equipment in high-pressure and high-temperature service conditions.
Engineers rely on Stainless Steel 347H Flanges where structural integrity, creep resistance, and corrosion protection are critical. Their enhanced high carbon content improves strength at elevated temperatures, making them suitable for long-term service in environments exposed to continuous heat and pressure.
Stainless Steel 347H is a stabilized austenitic chromium-nickel stainless steel alloy containing niobium, also known as columbium. The addition of niobium helps prevent chromium carbide precipitation, reducing the risk of intergranular corrosion after welding. The higher carbon content in 347H, compared to standard 347 grade, enhances creep strength and stress rupture properties at elevated temperatures.
The typical composition includes approximately 17 to 20 percent chromium and 9 to 13 percent nickel, with controlled niobium and carbon levels. This combination provides excellent oxidation resistance, strong mechanical properties, and reliable performance in high-temperature service. Stainless Steel 347H Flanges maintain structural stability in applications involving steam lines, heat exchangers, boilers, and pressure vessels.
Metallurgically, the alloy retains an austenitic structure, offering good toughness and ductility even after exposure to thermal cycles. These flanges demonstrate high tensile strength, good weldability, and dependable resistance to scaling in continuous service environments exceeding moderate temperature ranges.
Stainless Steel 347H Flanges, Stainless Steel 347H Flanges Manufacturers, Stainless Steel 347H Flanges Suppliers, Stainless Steel 347H Flanges Stockists, Stainless Steel 347H Flanges Exporters
Stainless Steel 347H Flanges offer superior high-temperature strength compared to many conventional stainless steel grades. Their enhanced carbon content improves creep resistance, making them ideal for pressure equipment operating under sustained heat and load conditions. This strength ensures reliable joint integrity in critical piping systems.
Corrosion resistance is another key advantage. The chromium-rich composition forms a protective oxide layer that resists oxidation and chemical attack in petrochemical and industrial environments. The niobium stabilization prevents sensitization during welding, ensuring long-term durability in welded assemblies.
Durability and long service life contribute to overall cost efficiency. These flanges reduce maintenance frequency and downtime in industrial facilities. Their machinability and fabrication compatibility allow them to be manufactured into various flange types such as weld neck, slip-on, blind, socket weld, and threaded flanges for diverse engineering requirements.
Stainless Steel 347H Flanges in India, Stainless Steel 347H Flanges Manufacturers in India, Stainless Steel 347H Flanges Suppliers in India, Stainless Steel 347H Flanges Stockists in India, Stainless Steel 347H Flanges Exporters in India
In high-temperature power generation systems, Stainless Steel 347H Flanges Manufacturers supply flanges used in boiler piping, superheater tubes, and steam distribution lines. Their creep resistance and thermal stability make them suitable for continuous operation in thermal and nuclear power plants.
Within oil and gas refineries and petrochemical complexes, Stainless Steel 347H Flanges Suppliers provide reliable flange connections for process piping handling hydrocarbons, high-pressure steam, and corrosive chemicals. These flanges ensure leak-proof joints and structural integrity under extreme service conditions.
For large-scale industrial fabrication and maintenance projects, Stainless Steel 347H Flanges Stockists maintain ready inventory of standard and custom-sized flanges to support shutdown schedules and urgent plant requirements. Availability in various pressure ratings and dimensions ensures compatibility with existing piping systems.
In international infrastructure and energy projects, Stainless Steel 347H Flanges Exporters deliver certified flanges to global markets for use in offshore platforms, chemical processing plants, and high-temperature industrial units. Compliance with international specifications guarantees quality, traceability, and performance across borders.
Stainless Steel 347H Flanges in United States, Stainless Steel 347H Flanges Manufacturers in United States, Stainless Steel 347H Flanges Suppliers in United States, Stainless Steel 347H Flanges Stockists in United States, Stainless Steel 347H Flanges Exporters in United States
Stainless Steel 347H Flanges are manufactured in accordance with ASTM A182 specifications for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves intended for high-temperature service. The corresponding ASME standard is ASME SA182 Grade F347H, which defines chemical composition, mechanical properties, heat treatment, and testing requirements. Flanges are also produced following ASME B16.5 and ASME B16.47 dimensional standards to ensure compatibility with pressure piping systems. These specifications confirm that Stainless Steel 347H Flanges meet the requirements for pressure equipment, chemical processing units, refineries, and power plants operating under elevated temperature conditions.
Steel products such as flanges, round bars, pipes, tubes, plates, sheets, and coils are identified and classified under globally recognized standards including ASTM, ASME, EN, DIN, JIS, and ISO. ASTM and ASME standards define material grades and application requirements for pressure vessels and piping systems. EN and DIN standards regulate European structural and industrial steel materials, while JIS governs Japanese specifications. ISO standards harmonize testing, certification, and quality management practices worldwide. Stainless steel grades like 347H are designated based on alloy composition, heat treatment condition, and performance characteristics, enabling engineers and procurement specialists to specify the correct material for structural engineering, industrial fabrication, and high-temperature processing equipment.
Steel Icon Stainless Pvt. Ltd. is one of the leading manufacturers & suppliers of 347 Stainless Steel ANSI B16.5 Flange, SS 347H ASME B16.5 Class 150 Flanges, 347/347H SS 300# Flanges, 347/347H Stainless Steel 1500# Flanges, ASTM A182 F347 2500 Lbs Flanges, ASME SA 182 F347H BS10 Table E Flanges, DIN Flanges, JIS Flanges at the best price in India
Request Latest Price & Stock Availability| Specification Of : | Stainless Steel 347H Flanges |
|---|---|
| Technique Use In Forging |
|
| Flanges Top 4 Types | Screwed / Forged/ Threaded / Plate |
| Mostly Use Types | Lap Joint, Threaded, Weld Neck, Blind, Slip-On, Socket-Weld |
| Industries Use | Waterworks & Municipal Pipe Systems Nuclear Power And The Power Plants Industry Food Processing & Manufacturing |
| High Temperature | Above 400°C (750°F) And Above 200°C (400°F) For 150LB |
| Low Temperature | Above -29 °C (−20°F) |
| JIS Standards | 5K To 63K |
| Manufacturing Flange Face | Lap-Joint Face, Large Tongue & Groove And Small Tongue Groove, RTJ, FF, Raised Face, Large Male-Female And Small Male-Female |
| Size | 1/2 Inch To 48 Inch |
| We Manufacturer This Materials | Carbon Steel, Inconel, Hastelloy, Copper Nickel, Stainless Steel, Cast Iron, Duplex Steel & Super Duplex Steel, Wrought Iron, Alloy Steel, Mild Steel. |
| Thickness Size | Normal Pipe Size ≤ 18 |
| Bore Diameter | NPS ≤ 10 |
| RPF India Manufacturer Below Standards | UNI, EN-1092, ANSI/ASME B16.5, B16.47 Series A & B, BS1560-3.1, API7S-15, ASME B16.48, AWWA C207, IS 2062, EN1092, API7S-43, MSS S44, ISO70051, ASME B16.36, DIN, API, ISO, API605, BS4504 |
| Pressure Ratings | 150 To 2500 |
| C | Cr | Mn | Ni | P | S | Si | Cb/Ta | |
|---|---|---|---|---|---|---|---|---|
| 347H |
min: 0.04 max: 0.10 |
min: 17.0 max: 20.0 |
2.0 max | min: 9.0 max: 13.0 |
0.03 max | 0.30 max |
0.75 max |
min:10x C max: 1.0 |
| Grade | Tensile Strength ksi (MPa) min | Yield Strength 0.2% ksi offset ksi (MPa) min | Elongation (% in 50mm) min | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 347H |
75 (515) |
30 (205) |
40 | 201 | 95 |
