Recently, YUHONG successfully completed the production and delivery of a batch of large-diameter ASTM A350 LF2 CL1 BL RTJ RF flanges.
The delivered flanges strictly adhere to the ASTM A350/A350M standard set by the American Society for Testing and Materials. The material used is LF2 (low carbon alloy steel), which meets the low-temperature impact performance requirements of CL1 (Class 1) and is suitable for extreme working conditions at -46℃. The products feature a BL (Blind Flange) structural design, with a sealing surface in the form of RTJ (Ring Type Joint) and an end connection type of RF (Raised Face). The nominal sizes cover a wide range of large diameters, fully meeting the stringent engineering requirements for high pressure, low temperature, and high sealing performance.
| C | Mn | P | S | Si | Cu | Ni | Cr | Mo | V | Nb |
|---|---|---|---|---|---|---|---|---|---|---|
| ≤ 0.30 | 0.60 – 1.35 | ≤ 0.035 | ≤ 0.040 | 0.15 – 0.30 | ≤ 0.40 | ≤ 0.40 | ≤ 0.30 | ≤ 0.12 | ≤ 0.08 | ≤ 0.02 |
