Ronwen Flanges, a top-notch manufacturer and supplier located in Cape Town, South Africa, specializes in high-quality **Stainless Steel 348H Flanges** that are built to withstand extreme temperatures, resist corrosion, and last for years. Crafted from stabilized 348H austenitic stainless steel, these flanges are infused with niobium (columbium) to prevent carbide precipitation, ensuring they perform exceptionally well in welded and high-temperature settings. With a commitment to precision engineering and adherence to international standards, Ronwen Flanges delivers 348H flanges that are perfect for the **power generation, petrochemical, chemical processing, marine, and oil & gas industries**, where dependable, leak-proof connections are essential in tough conditions.
**Stainless Steel 348H Flanges** mainly consist of **iron, 17–19% chromium, 9–13% nickel, and niobium (0.5–1.0%)**, along with a slightly elevated carbon content (~0.05–0.10%) to boost high-temperature strength. They boast impressive **mechanical properties**, featuring a **tensile strength of 515–700 MPa**, **yield strength of 205–275 MPa**, and commendable ductility and toughness even at high temperatures. These flanges are designed to resist **oxidation, scaling, and intergranular corrosion**, ensuring they maintain their structural integrity in harsh high-temperature and corrosive environments.
| 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) |
Ronwen Flanges, a leading supplier in Cape Town, South Africa, offers an extensive selection of Stainless Steel 348H Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
You’ll find **Stainless Steel 348H Flanges** commonly used in **boilers, heat exchangers, high-temperature piping systems, furnace components, and pressure vessels**. They are particularly suited for **power plants, chemical plants, refineries, and marine applications**, where they often face extreme heat, welded joints, and corrosive substances. Thanks to their blend of **high-temperature strength, corrosion resistance, and durability**, 348H flanges are the go-to choice for **critical industrial applications that demand reliable performance in severe conditions**.
| SS 348H | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Yes, we offer custom sizes for Stainless Steel 348H Flanges to meet specific project needs. Our team at Ronwen Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@ronwenflanges.co.za.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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