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Advantages |
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Detrick’s designs utilize pre-fired brick to give them a complete ceramic bond throughout the entire working lining. This eliminates any possibility of the lining cracking, due to inaccurate mixing with the castable. Castable relies heavily on the installation procedures in determining its mechanical properties. Pre-fired brick maintain higher and more consistent properties than castable. Including density, strength and thermal characteristics. Brick linings can be heated up faster than castable linings since they have been pre-fired; this reduces heat-up costs and increases operating time. |
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Also, there is no need to make any construction joints for expansion after a Detrick lining is installed. All of the horizontal and vertical expansion is designed and built into the Detrick systems from the start of the project. Brick linings can be installed faster, due to the lack of labor intense forming that is needed for a castable lining. Brick linings generally last longer than castable and can accept more abusive operating environments. |
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Detrick MSA Design |
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MSA Standard & Posted Typical Cross Section Showing Anchor & Filler Rows |
Standard & Posted Detrick MSA roofs considered consisted of 7 1/2” of 70% AL2O3 filler brick insulated with 2" of 2200°F insulating castable and 2" of 8# ceramic fiber blanket. The MSA 70% AL2O3 anchor brick is 12 1/2" deep and uses Detrick's unique insulating hanger casting, which allows 1" of block insulation over the anchor. The filler represents 75% and the anchor represents 25% of the roof using the standard design. Using the posted design, the filler represents 87% and the anchor represents 13% of the roof. |
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Standard
MSA Design: Heat
Loss (75-25) Filler 452 x .75 = 339 Anchor
888 x .25 = 222 561 BTU/Sq.Ft./Hr.
Cold
Faces (75-25) Filler
270 x .75 = 203 Anchor
317 x .25 = 79 282°F |
Standard MSA Design Anchor Row |
Posted
MSA Design: Heat
Loss (87-13) Filler 492 x .87 = 428 Anchor
888 x .13 = 115 543 BTU/Sq.Ft./Hr.
Cold
Faces (87-13) Filler
270 x .87 = 235 Anchor
367 x .13 = 48 283°F |
Posted MSA Design Anchor Row |
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Plastic Roof Design |
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The plastic roof considered consisted of 8” of 70% AL2O3 insulated the same as the Detrick designs. The anchoring system was 12" 85% AL2O3 brick on 12" centers. The plastic represents 89% and the anchor represents 11% of the roof based on the anchor spacing. |
Plastic Design Anchor Row |
Plastic
Design: Heat Loss Plastic 452 x .89 = 339 Anchor
2346 x .11 = 258 660 BTU/Sq.Ft./Hr.
Cold Faces Plastic
270 x
.89 = 240 Anchor 595 x .11 = 65 305°F |
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Thermal Analysis Summary - Design Comparison |
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| Design Method |
Avg. Cold Face (°F) |
Avg. Heat Loss (BTU/Sq.Ft./Hr) |
% Heat Loss Savings vs. Plastic |
| MSA Roof - Standard | 282 | 561 | 15.0% |
| MSA Roof - Posted | 283 | 543 | 17.5% |
| Plastic Roof | 305 | 660 | N/A |
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Assumptions: Hot Face of Material = 2400°F Ambient Air at 70°F and 0 mph. Emissivity = .85 |
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K Values used in Thermal Analysis |
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| Material |
400 °F |
800 °F | 1200 °F | 1600 °F | 2000 °F |
| 85% Alumina Brick | 19.5 | 17.7 | 16.1 | 15.5 | 15.5 |
| 70% Alumina Plastic | 11.5 | 10.7 | 10.25 | 10.2 | 10.2 |
| 70% Alumina Brick | 13.5 | 12.9 | 12.7 | 13.0 | 13.3 |
| 2000°F Insulating Castable | 1.4 | 1.56 | 1.71 | 1.92 | 2.18 |
| 8# Ceramic Blanket | .28 | .5 | .9 | 1.3 | 1.77 |
| Block Insulation | .42 | .61 | .91 | 1.21 | 1.44* |
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*K calculated at 1900°F mean temperature. |
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Home Office - Chicago Area
9400 Bormet Dr. Suite 10
Mokena, Illinois 60448
Phone: 1-(708)-479-5085 Fax: 1-(708)-479-1030
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These pages were created, and are maintained, by the employees of M.H. Detrick Co.
Copyright ©
2003 M.H. Detrick Co.