Main flange standards include ASME B16.5 (US), EN 1092-1 (EU), domestic GB/T and HG, plus GOST for the Russian market.
Pressure classes designated as Class150 / 300 / 600 / 900 / 1500, covering common sizes DN15 ~ DN600 with RF, RTJ, RJ facings.
Pressure ratings designated as PN (PN6 / PN10 / PN16 / PN25 / PN40); Class and PN are not directly interchangeable and must be evaluated against design conditions.
Tiancheng flanges strictly comply with ASME B16.5 / GB/T / HG / EN / GOST standards across all pressure classes, with standard system and facing recommendations based on customer design conditions.
