Technical features and purpose of pipes according to ASTM B337 standard
The ASTM B337 specification (identical to ASME SB 337) regulates the production and supply of seamless and welded pipes made of titanium and its alloys. This standard covers six main material grades, optimized for operation in aggressive environments with high corrosion risk, as well as in units operating at elevated temperature conditions. EV Group China products meet strict ASTM quality criteria, ensuring stable performance in the chemical and petrochemical industries.
| Material Grade | UNS Number | Chemical composition and description |
|---|---|---|
| Grade 1 | UNS R50250 | Unalloyed titanium |
| Grade 2 | UNS R50400 | Unalloyed titanium |
| Grade 3 | UNS R50550 | Unalloyed titanium |
| Grade 7 | UNS R52400 | Unalloyed titanium with palladium addition (0.12–0.25%) |
| Grade 9 | UNS R56320 | Titanium alloy (3.0% Al, 2.5% V) |
| Grade 12 | UNS R53400 | Titanium alloy (0.3% Mo, 0.8% Ni) |