Veer Flanges is a reputable manufacturer and supplier of Low Temperature Carbon Steel LF1 Flanges, proudly based in Kolkata, India. We serve industries that need strong and reliable flange solutions for sub-zero temperature settings. Our LF1 flanges are crafted in accordance with ASTM A350 standards, ensuring they deliver high impact toughness and excellent weldability for moderate low-temperature applications. You can find our LF1 flanges in various sizes, pressure classes, and types, including weld neck, slip-on, and blind flanges. They are widely utilized in chemical plants, gas processing units, refineries, and low-temperature pressure systems across multiple sectors.
LF1 flanges are constructed from a carbon-manganese steel blend, typically featuring carbon (≤0.30%), manganese (0.60–1.35%), phosphorus (≤0.035%), sulfur (≤0.040%), and silicon (0.15–0.30%). Their mechanical properties boast a tensile strength of 415–585 MPa, yield strength of at least 240 MPa, and impressive notch toughness even at temperatures as low as -18°C (0°F). The steel is usually normalized or normalized and tempered to enhance its structural integrity. LF1 flanges are ideal for applications that require moderate cold resistance, making them a cost-effective option for mildly cold service conditions.
| Size Chart | 1/2″ to 48″ |
|---|---|
| Pressure Rating ANSI | 1500 LBS, 600 LBS, 300 LBS, 900 LBS, 150 LBS, 2500 LBS |
| UNI | 25Bar 16Bar 6Bar 10Bar 40Bar |
| Pressure Calculation in DIN | 25Bar 40Bar 6Bar 10Bar 16Bar / PN64 PN40 PN16 PN25 PN10 PN6 |
| JIS | 40 K, 20 K, 5K, 10 K, 63 K, 30 K, 16 K |
| Coating | Oil Black Paint, Anti-rust Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized |
| Most common types | Threaded / Forged / Screwed / Plate |
| Production technique |
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| Connect Types/ Flange Face Types Manufacturer | Large Male-Female, RTJ, Flat Face, Lap-Joint Face, Small Male-Female, Raised Face, Small Tongue, Large Tongue & Groove |
| EN | 25Bar 6Bar 10Bar 40Bar 16Bar |
| Test | Direct-reading Spectrograph, UI trasonic flaw detector, X-ray detector, Hydrostatic testing machine, Magnetic particle detector |
| Equipment | electric bevelling machine, Pushing Machine, Press machine, Bending machine, Sand-blasting machine etc |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Manufacturer of | GOST, BS, AS2129, AWWA, ANSI DIN, JIS, UNI, EN, SABS, NFE etc. : BS, EN, UNI, ASME, API 6A, ANSI, JIS/ KS, BS4504, AWWA C207, EN1092-1, DIN, GB, GOST |
| Grade | C | Mn | P | S | Si | Ni | Ch | Mo | Cb |
| F1 | 0.28 | 0.60 – 0.90 | 0.045 | 0.045 | 0.15 – 0.30 | – | – | 0.44-0.65 | – |
| 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 | ||||
| F1 | 485 | 275 | 20 | – | 143-192 |
Veer Flanges, a leading supplier in Kolkata, India, offers an extensive selection of Low Temperature Carbon Steel LF1 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.
Low Temperature Carbon Steel LF1 Flanges are mainly designed for use in moderate low-temperature service environments, such as oil and gas transmission pipelines, refrigeration systems, pressure vessels, and chemical processing plants. These flanges are perfect for connecting piping systems where ambient or process temperatures dip below room temperature but don’t reach cryogenic levels. You’ll often find LF1 flanges in refineries, fuel storage facilities, shipbuilding, and low-pressure steam systems. Their excellent weldability, ease of fabrication, and affordability make them a dependable choice for less extreme cold service, where both structural performance and cost-efficiency are essential.
Yes, we offer custom sizes for Low Temperature Carbon Steel LF1 Flanges to meet specific project needs. Our team at Veer Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@veerflanges.co.in.
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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