Last updated: 2026-10-17 · Reviewed by: Senior Metallurgical Engineer, {BRAND} A 3.0 m inside diameter shell at 1.6 MPa design pressure in SA-516 Grade 70 needs 17.5 mm of pressure thickness by UG-27, and 20.5 mm once 3 mm of corrosion allowance is added, so it is ordered as 22 mm plate. The formula is…
Last updated: 2026-10-17 · Reviewed by: Senior Metallurgical Engineer, {BRAND} Most weld overlay failure in hydrometallurgical vessels starts in the first pass, not in service. Iron dilution above about 10% drops the first-layer chemistry below the corrosion-resistant specification, and the defect then sits under 3 mm of sound metal until a pinhole connects it to…
Last updated: 2026-10-17 · Reviewed by: Senior Metallurgical Engineer, {BRAND} For a pressure oxidation autoclave at 4.5 MPa and 4.0 m inside diameter in SA-516 Grade 70, Division 1 requires roughly 74 mm of shell where Division 2 requires roughly 50 mm. That 24 mm difference is about 23 tonnes of steel on a 10…
Last updated: 2026-10-17 · Reviewed by: Senior Metallurgical Engineer, {BRAND} Pressure vessel material selection in hydrometallurgical service is decided by four inputs in a fixed order: peak chloride concentration at the wetted surface, peak metal temperature, free acid concentration, and oxidising potential. For a copper pregnant leach solution at 45 °C carrying 10 g/L H2SO4…
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