
Valves, oil & gas
Valve bodies, bonnets, stems, discs and seats, much of it in stainless and alloy steel for oil, gas and process plant. These parts have to hold pressure and resist corrosion for years, and valve makers check the paperwork as closely as the parts.
Cast bodies are normalised, or stress relieved after weld build-up. Stainless trim is solution annealed and quenched within 20 seconds, stabilised grades like F321 and F347 get their own cycle, and special alloys such as 718 are aged to specification. Every batch goes back with its hardness report.


