Pressure-vessel dished ends and heads: 600–6,000 mm diameter, 3–50 mm thickness and 0.1–10 MPa. Compare elliptical, torispherical, hemispherical and conical forms.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Diameter | 600–6000 mm | Nominal inside diameter; larger diameters require thicker plates and may need segmented fabrication.ASME BPVC Section VIII Div.1 |
| Thickness | 3–50 mm | Minimum thickness per ASME code; actual thickness depends on design pressure and diameter.ASME BPVC Section II |
| Crown Radius | 0.8–1.0 × D mm | For torispherical heads, crown radius typically equals the vessel diameter (D).ASME BPVC Section VIII Div.1 |
| Knuckle Radius | 0.06–0.1 × D mm | Knuckle radius must be at least 6% of crown radius to avoid excessive stress.ASME BPVC Section VIII Div.1 |
| Surface Finish | Ra 0.8–6.3 μm | Ra 0.8 for sanitary applications; Ra 6.3 for general industrial use.ASME B46.1 |
| Pressure Rating | 0.1–10 MPa | Maximum allowable working pressure (MAWP) at design temperature; higher pressures require thicker heads.ASME BPVC Section VIII Div.1 |
| Temperature | -29 to 425 °C (carbon steel), -196 to 400 °C (stainless) | Outside this window: Below -29°C carbon steel may become brittle; above 425°C creep becomes significant. |
| Pressure | 0.1–10 MPa (internal) | Outside this window: Exceeding MAWP can cause plastic deformation or rupture. |
| Corrosive media | pH 4–12 for stainless; pH 0–14 for nickel alloys | Outside this window: Outside range leads to pitting, stress corrosion cracking, or general corrosion. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
The main pressure vessel that contains the liquid to be concentrated under vacuum conditions in an evaporator system.
The primary pressure-containing structure of an ammonia oxidation reactor that houses the catalyst bed and reaction zone.
The structural housing that contains and protects the desiccant material within a desiccant bed system.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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6 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
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The most common types are torispherical (for cost-effectiveness), elliptical (2:1 ratio for balanced strength), and hemispherical (for high-pressure applications). Selection depends on pressure, cost, and space constraints.
They minimize stress concentrations, allowing thinner walls and better heat transfer. Their smooth curvature reduces fluid turbulence and scaling, improving thermal performance and cleanability.
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