Mueller High-Quality Tank Heads

Mueller manufacturing capabilities allow us to supply tank heads for many different applications and with a variety of value-added options. Heat transfer surface, manways, and fittings can be our standard designs or custom fabricated in any configuration to meet your specifications.

Head Materials

Mueller heads may be fabricated from any material that can be cold formed. We can form them from material in our stock or we can use material supplied by you.

• Type 300 and 400 series stainless steel
• Nickel 200
• Monel^® Alloy 400
• Inconel^® Alloy 600
• Inconel^® Alloy 625
• Carpenter^® No. 20
• Hastelloy^® C-276, B-2, and G-22
• 254 SMO^®
• Incoloy^®
• Carbon Steel
• Allegheny^® - AL-6XN
• Alloy 2205

General Information

Circle Cutting
Complete circle cutting facilities are available if rectangular blanks for heads are furnished by the customer.

Heads with Seams
Shipment can be expedited by putting a welded seam in the head, provided customer's pressure calculations will permit it. This seam is made by ASME code-qualified welders. In the case of ASME heads, we can X-ray the seam if required. Partial Data Sheets (ASME Form U-2) can be supplied.

Forming
All heads are cold formed. Heads are formed to outside diameter, except elliptical and hemispherical-type heads which are usually made to inside diameter. Flanged and dished heads above 18" can be made to any OD or ID. Due to shipping requirements, we can form heads in one piece to a maximum of 8,500 pounds.

Mill Test Reports
Original mill test reports are provided with all heads when Mueller supplies the material.

Delivery and Shipping
Heads normally require three weeks to form, depending upon the size and quantity. Heads up to 204" can be shipped via truck; special framing may be required on some larger sizes.

Terminology

Thickness (THK): All thickness dimensions are considered nominal unless otherwise specified. In cases where a minimum thickness is required, this should be clearly indicated on your inquiry or order.

Inside Dish Radius (IDR): ASME and standard flanged and dished heads are formed with an inside dish radius equal to the outside diameter of the head. Also, it is possible to form heads in 30" and above with a radius of dish equal to 80% of the diameter.

Straight Flange: 1 1/2" straight flange is considered standard for most material thicknesses. Flanges up to 3" can be supplied on some heads, providing mateial thickness is suitable. Heads under 3/16" thickness are supplied with a 1" straight flange.

Center Hole: Heads 18" and larger are formed with a 1 3/8" - 1 1/2" maximum center hole. When a center hole is not desired, it can be plugged and X-rayed if necessary.

Inside Corner Radius (ICR): The inside corner radius will be a minimum of 6% of diameter on ASME code heads.

Inside Depth of Dish (IDD): This is the depth of the head at its center, including the inside corner radius, but not the straight flange.

Overall Height (OH): The total height of the head is obtained by adding the IDD, SF, and THK together. Both the straight flange and overall height cannot be guaranteed.