Built for pressure classes beyond what standard thickness charts anticipate — extra plate thickness and often forged construction for the most demanding pressure-boundary service.
| Structural Principle | Thickness calculated beyond standard charted ranges for extreme pressure service |
| Typical Thickness Range | 80 mm - 250+ mm, service-dependent |
| Common Construction | Frequently forged rather than plate |
| Governing Codes | ASME Section VIII Division 1 or 2, per pressure class |
Heavy duty designs commonly pair with forged construction and premium alloys.
There's no single universal number — it's whenever the required thickness from the pressure/diameter/material calculation exceeds what's charted as standard for that product line, which varies by material and diameter.
Not necessarily — it primarily affects thickness, though very high pressure combined with corrosive or high-temperature service often does push the material selection toward higher-strength alloys or forged construction.
Division 2 becomes relevant at higher pressure classes where its more detailed design-by-analysis approach allows thinner sections than Division 1's simpler rules — whether it applies depends on the specific pressure and code requirement for your project.
Every enquiry is checked against governing code, material compatibility and manufacturing feasibility before a quote is issued. Use our product, material, grade and standards guides to freeze the RFQ — then confirm with engineering.
Send your diameter, material, pressure class and quantity — we'll confirm thickness and price.