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MARKS Design and Metalworks is proud to produce custom flanged and dished polished heads that meet high industry standards and exceed customer expectations. Our Boldrini dishing press and flanging machine coupled with our inhouse engineering department ensure meeting the customer’s requirements. MARKS can produce ASME standard profiles or work with the customer to develop custom profiles. MARKS specializes in stainless steel heads and tank ends.
STANDARD PROFILES
ASME Semi Elliptical Head (SE), 2:1 Semi-Elliptical
ASME – ELIPTICAL (2:1 RATIO)
A 2:1 elliptical tank head is fabricated to have a certain shape instead of a particular dish radius or knuckle radius. The dish radius is approximately 90% of the diameter and the knuckle radius is approximately 17% of the diameter. 2:1 elliptical flanged and dished polished heads are ASME compliant.
| HEAD DIMENSIONS AND SPECIFICATIONS | |
| Diameter | 32” to 64” |
| Dish Radius | Approximately 90% of O.D. |
| Knuckle Radius | Approximately 17% of O.D. |
| Thickness | 10 gauge to 3/8” |
ASME Semi Elliptical Head (SE), 1.9:1 Elliptical
ASME – ELIPTICAL (1.9:1 RATIO)
A 1.9:1 elliptical tank head is fabricated to have a certain shape instead of a particular dish radius or knuckle radius. The dish radius is approximately 86% of the diameter and the knuckle radius is approximately 19% of the diameter. 2:1 elliptical flanged and dished polished heads are ASME compliant.
| HEAD DIMENSIONS AND SPECIFICATIONS | |
| Diameter | 30” to 58” |
| Dish Radius | Approximately 86% of O.D. |
| Knuckle Radius | Approximately 19% of O.D. |
| Thickness | 10 gauge to 3/8” |
ASME Torispherical Head (F&D), 80-10
ASME – Flanged & Dished Polished Heads
As the inside diameter formed heads increases in size, savings in material cost can be achieved by designing 80-10 Torispherical heads rather than standard ASME Torispherical or Ellipsoidal shapes. It features a dish radius equal to 80% of the diameter, and an inside knuckle radius equal to 10% of the head diameter.
The 80-10 is typically only 66% the thickness of the ASME Torispherical.
| HEAD DIMENSIONS AND SPECIFICATIONS | |
| Diameter | 30” to 124” |
| Dish Radius | Approximately 80% of O.D. |
| Knuckle Radius | Approximately 10% of O.D. |
| Thickness | 10 gauge to 3/8” |
ASME Torispherical Head (F&D), 100%
ASME – Flanged & Dished Polished Heads
Commonly used for ASME pressure vessels, these torispherical heads have a crown radius equal to the outside diameter of the head, and a knuckle radius equal to 6% of the outside diameter. The ASME design code does not allow the knuckle radius to be any less than 6% of the outside diameter.
| HEAD DIMENSIONS AND SPECIFICATIONS | |
| Diameter | 30” to 124” |
| Dish Radius | Approximately 100% of O.D. |
| Knuckle Radius | Approximately 6% of O.D. |
| Thickness | 10 gauge to 3/8” |
ASME Torispherical Head (F&D), 90%
ASME – Flanged & Dished Polished Heads
Commonly used for ASME pressure vessels, these torispherical heads have a crown radius equal to 90% of the outside diameter of the head, and a knuckle radius equal to 8% of the outside diameter. The ASME design code does not allow the knuckle radius to be any less than 8% of the outside diameter.
| HEAD DIMENSIONS AND SPECIFICATIONS | |
| Diameter | 30” to 124” |
| Dish Radius | Approximately 90% of O.D. |
| Knuckle Radius | Approximately 8% of O.D. |
| Thickness | 10 gauge to 3/8” |
MARKS Standard Head (F&D), non-ASME
non-ASME – Flanged & Dished Polished Heads
MARKS standard heads are used in many of our beverage and food service tanks. This custom profile is not a ASME standard but serves beverage tank needs well. These torispherical heads have a crown radius equal to 100% of the outside diameter of the head, and a knuckle radius approximately equal to 5% of the outside diameter.
| HEAD DIMENSIONS AND SPECIFICATIONS | |
| Diameter | 30” to 124” |
| Dish Radius | Approximately 100% of O.D. |
| Knuckle Radius | Approximately 5% of O.D. |
| Thickness | 10 gauge to 3/8” |
Meeting Your Needs
MARKS manufacturing team will work with you to meet your flanged and dished polished heads needs. We can build using our standard designs, your drawings, or have one of our engineers develop the design for your specific tank requirements. Call (360) 859-3535 or contact us at sales@marksdmw.com for a quote today.
