Niazi Stainless, a prominent manufacturer and supplier located in Manama, Bahrain, specializes in high-quality Stainless Steel 347H Flanges designed for tough industrial settings. Renowned for their precision engineering and durability, the company adheres to international standards, ensuring that each SS 347H flange performs exceptionally well even in high-temperature and corrosive environments. Niazi Stainless is dedicated to providing reliable products and prompt service, earning their reputation as a trusted supplier throughout Bahrain and the Gulf region. Their Stainless Steel 347H Flanges are highly regarded for their heat resistance, strength, and longevity, making them perfect for industries like petrochemical, power generation, and chemical processing.
These flanges are made from a blend of chromium, nickel, and niobium, which gives them outstanding resistance to intergranular corrosion. The increased carbon content boosts their high-temperature strength and creep resistance. With impressive tensile strength, good toughness, and excellent stability during thermal cycling, SS 347H maintains its mechanical integrity even when exposed to high temperatures and harsh conditions for extended periods. Thanks to their strong weldability and formability, this alloy guarantees reliable performance in applications that demand structural durability, oxidation resistance, and long-term thermal stability.
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
| 347H | 0.08 | 2.0 | 1.0 | 0.045 | 0.030 | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347H | 515 | 205 | 35 | 92 | 201 |
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SS 347Hsocket weld flanges, manufactured from stainless steel alloy 347H, ensure secure pipe connections with enhanced corrosion resistance and high-temperature strength, suitable for high-pressure systems in various industries.
SS 347H ring type joint flanges, constructed from stainless steel alloy 347H, provide leak-proof connections with excellent corrosion resistance and high-temperature performance, ideal for high-pressure and critical service applications.
SS 347H forged flanges, made from stainless steel alloy 347H, offer superior strength, excellent corrosion resistance, and high-temperature endurance, making them ideal for demanding industrial applications and high-pressure environments.
We conduct various rigorous tests, including dimensional, mechanical, and chemical analysis, to ensure the highest quality of our Stainless Steel 347H Flanges. Our in-house quality control team oversees all processes, complemented by third-party inspections to guarantee compliance with industry standards. With a commitment to prompt delivery we ensure that our clients receive their products on time, every time.
Stainless Steel 347H Flanges find extensive use in industries that require both high-temperature strength and corrosion resistance. They’re commonly found in petrochemical plants, refinery piping systems, heat exchangers, and boiler equipment. Their thermal stability makes them ideal for superheater and reheater piping, furnace manifolds, and chemical processing units. Power generation facilities depend on SS 347H flanges for operations involving high pressure and heat. Additionally, they are utilized in pharmaceuticals, food processing, and aerospace applications where reliability, durability, and resistance to thermal stress are crucial. Their robust construction ensures a long service life.
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