Latham Steel, a top-notch manufacturer and supplier based in Hamilton, New Zealand, specializes in high-quality Low Temperature Carbon Steel LF787 Flanges. These flanges are expertly crafted for cryogenic and sub-zero temperature applications, ensuring they maintain their strength, ductility, and impact toughness even in the harshest cold conditions. Latham Steel adheres to strict ASTM and industry standards, providing reliable and dimensionally accurate flanges that are perfect for high-pressure systems. Their LF787 flanges are a popular choice in LNG processing, low-temperature storage, petrochemical plants, refrigeration units, and gas distribution networks. With excellent weldability, corrosion resistance, and a long service life, LF787 flanges guarantee safe and efficient system performance.
Low Temperature Carbon Steel LF787 Flanges are made with a carefully controlled carbon content, along with manganese, silicon, and minimal sulfur and phosphorus to boost toughness and weldability. This alloy is specially refined to offer exceptional impact resistance at temperatures as low as −46°C. LF787 boasts impressive tensile and yield properties, making it suitable for high-pressure environments, while also providing excellent ductility and fracture resistance. Its low carbon equivalent allows for smooth welding and stable structural behavior even with temperature changes. These characteristics make LF787 a reliable option for cryogenic and low-temperature piping systems.
| Element | Composition |
|---|---|
| Carbon, max | 0.07 |
| Manganese | 0.40–0.70 |
| Phosphorus, max | 0.025 |
| Sulfur, max | 0.025 |
| Silicon [Note A] | 0.40 max |
| Nickel | 0.70–1.00 |
| Chromium | 0.60–0.90 |
| Molybdenum | 0.15–0.25 |
| Copper | 1.00–1.30 |
| Columbium | 0.02 min |
| Vanadium | 0.03 max |
| Tensile Class | Tensile Strength, ksi [MPa] | Yield Strength, min, ksi [MPa] [Note B, C] | Elongation | Reduction of Area, min, % | |
|---|---|---|---|---|---|
| Round Specimen in 4D, min, % | Strip Specimen in 2 Inch [50mm], min, % | ||||
| Class 2 | 65–85 [450–585] | 55 [380] | 20 | 28 | 45 |
| Class 3 | 75–95 [515–655] | 65 [450] | 20 | 28 | 45 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Latham Steel is one of the most prominent manufacturers and suppliers of superior quality Low Temperature Carbon Steel LF787 Flanges in Hamilton, New Zealand. As experts in steel solutions, we supply a complete spectrum of products like Carbon Steel, Alloy Steel, Mild Steel, and Galvanized Steel. Our product range comprises Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. Known for our reliable delivery and first-rate customer service, we are committed to supplying high-quality steel materials that guarantee durability and excellent performance in numerous industrial applications.Â
| ASME/ANSI B 16.5 | LTCS A350 LF787Â Welding Neck Flange, LTCS A350 LF787Â Slip on Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, LTCS A350 LF787Â Lap Joint Flange, Threaded Flange, LTCS A350 LF787Â Ring Type Joint Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | LTCS A350 LF787Â Welding Neck Flange, LTCS A350 LF787Â Blind Flange [Series A & B] |
| PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
| ASME/ANSI B 16.36 | LTCS A350 LF787Â Welding Neck Flange, LTCS A350 LF787Â Slip on Flange, LTCS A350 LF787Â Threaded Flange |
| PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
| BS 4504 SEC 3.1 | LTCS A350 LF787Â Welding Neck Flange, LTCS A350 LF787Â Hubbed Slip on Flange, LTCS A350 LF787Â Hubbed Threaded Flange, Lapped Pipe End Flange, LTCS A350 LF787Â Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange |
| PRESSURE CLASS | PN 2.5 TO PN 40 |
| BS 4504[PART 1] | LTCS A350 LF787Â Welding Neck Flange, LTCS A350 LF787Â Hubbed Slip-On Hubbed Threaded, Plate Flange, LTCS A350 LF787Â Loose Plate With Weld On Plate Collar, Blank Flange |
| PRESSURE CLASS | PN 2.5 TO PN 400 |
| BS 1560 BOSS | LTCS A350 LF787Â Welding Neck Flange, Socket Welding Flange, LTCS A350 LF787Â Slip-On Flange, LTCS A350 LF787Â Blind Flange, LTCS A350 LF787Â Screwed Boss Flange, LTCS A350 LF787Â Lapped Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| BS10 | LTCS A350 LF787Â Welding Neck Flange, LTCS A350 LF787Â Plate Slip-On Flange, LTCS A350 LF787Â Screwed Boss Flange, Slip-On Boss Flange, LTCS A350 LF787Â Blind Flange |
| TABLE | D, E, F, H |
| DIN FLANGES | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| PRESSURE CLASS | PN 6 TO PN 100 |
| NPS | O.D. of Flange | Flanges Thickness | Diameter of RF | Diameter of Hub at Base | Lengtd Tdru Hub | Bore or Diameter | Dia. of Hub at Bevel | Radius of Fillet | Deptd of Socket | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Welding (WN) Neck | Slip-On (SORF) Threaded (NPT) Socket (SWRF) | Lap Joint (Loose) | Slip-on (SORF) Socket (SWRF) | Lap Joint (Loose) | ||||||||
| O | Q | R | X | Y | Y | Y | W | B | H | r | Z | |
| 1/2 | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 | .88 | .90 | .84 | 1/8 | 3/8 |
| 3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 5/8 | 1.09 | 1.11 | 1.05 | 1/8 | 7/16 |
| 1 | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 11/16 | 1.36 | 1.38 | 1.32 | 1/8 | 1/2 |
| 1-1/4 | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 13/16 | 1.70 | 1.72 | 1.66 | 3/16 | 9/16 |
| 1-1/2 | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 7/8 | 1.95 | 1.97 | 1.90 | 1/4 | 5/8 |
| 2 | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 1 | 2.44 | 2.46 | 2.38 | 5/16 | 11/16 |
| 2-1/2 | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 1-1/8 | 2.94 | 2.97 | 2.88 | 5/16 | 3/4 |
| 3 | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 1-3/16 | 3.57 | 3.60 | 3.50 | 3/8 | 13/16 |
| 3-1/2 | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 1-1/4 | 4.07 | 4.10 | 4.00 | 3/8 | 7/8 |
| 4 | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 1-5/16 | 4.57 | 4.60 | 4.50 | 7/16 | 15/16 |
| 5 | 10 | 15/16 | 7.5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 1-7/16 | 5.66 | 5.69 | 5.56 | 7/16 | 15/16 |
| 6 | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 1-9/16 | 6.72 | 6.75 | 6.63 | 1/2 | 1-1/16 |
| 8 | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 1-3/4 | 8.72 | 8.75 | 8.63 | 1/2 | 1-1/4 |
| 10 | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 1-15/16 | 10.88 | 10.92 | 10.75 | 1/2 | 1-5/16 |
| 12 | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 2-3/16 | 12.88 | 12.92 | 12.75 | 1/2 | 1-9/16 |
| 14 | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 3-1/8 | 14.14 | 14.18 | 14.00 | 1/2 | 1-5/8 |
| 16 | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 3-7/16 | 16.16 | 16.19 | 16.00 | 1/2 | 1-3/4 |
| 18 | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 3-13/16 | 18.18 | 18.lf2 | 18.00 | 1/2 | 1-15/16 |
| lf2 | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 4-1/16 | lf2.lf2 | lf2.25 | lf2.00 | 1/2 | 2-1/8 |
| 24 | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 4-3/8 | 24.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
| Nominal Pipe Sizes (NPS) | Slip On (SORF) | Threaded (NPT) | Socket Weld (SWRF) | Lap Joint (Loose) | Blind (BLRF) | Weld Neck (WRNR) |
|---|---|---|---|---|---|---|
| ½ | 1 | 1 | 2 | 1 | 2 | 2 |
| ¾ | 2 | 2 | 2 | 2 | 2 | 2 |
| 1 | 2 | 2 | 2 | 2 | 2 | 3 |
| 1¼ | 3 | 3 | 3 | 3 | 3 | 3 |
| 1½ | 3 | 3 | 3 | 3 | 4 | 4 |
| 2 | 5 | 5 | 5 | 5 | 5 | 6 |
| 2½ | 8 | 8 | 8 | 8 | 7 | 10 |
| 3 | 9 | 9 | 9 | 9 | 9 | 11.5 |
| 3½ | 11 | 12 | 11 | 11 | 13 | 12 |
| 4 | 13 | 13 | 13 | 13 | 17 | 16.5 |
| 5 | 15 | 15 | 15 | 15 | lf2 | 21 |
| 6 | 19 | 19 | 19 | 19 | 27 | 26 |
| 8 | 30 | 30 | 30 | 30 | 47 | 42 |
| 10 | 43 | 43 | 43 | 43 | 70 | 54 |
| 12 | 64 | 64 | 64 | 64 | 123 | 88 |
| 14 | 90 | 90 | 90 | 105 | 140 | 114 |
| 16 | 106 | 98 | 98 | 140 | 180 | 140 |
| 18 | 130 | 130 | 130 | 160 | 2lf2 | 165 |
| lf2 | 165 | 165 | 165 | 195 | 285 | 197 |
| 22 | 185 | 185 | 185 | 245 | 355 | 225 |
| 24 | 2lf2 | 2lf2 | 2lf2 | 275 | 430 | 268 |
LF787 Low Temperature Carbon Steel Flanges find extensive use in industries where piping systems operate in sub-zero or cryogenic conditions. Common applications include LNG terminals, refrigeration plants, cryogenic storage tanks, gas processing facilities, petrochemical units, and pipelines for low-temperature fluids. These flanges deliver remarkable toughness and leak-proof performance in systems that handle liquefied gases, cold hydrocarbons, and low-temperature chemicals.
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Latham Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hamilton, New Zealand.
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