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Mill phosphatized steel has a zinc phosphate coating. Zinc phosphate is considered dangerous to aquatic life and special handling is required at the mill to prevent its release into the environment. Both annealing and phosphatizing processes promote paint adhesion by damaging the original hot dip galvanized coating.
designation; mill-phosphatized finish for surfaces of ducts exposed to view. B. Reinforcement Shapes and Plates: Galvanized steel reinforcement where installed on galvanized, sheet metal ducts; compatible materials for aluminum and stainless-steel ducts.
Aug 01, 2012· designation; mill-phosphatized finish for surfaces of ducts exposed to view. B. PVC-Coated Galvanized Steel: UL 181, Class 1 listing. Lock-forming-quality, galvanized, sheet steel with ASTM A 653/A 653M, G90 coating designation; factory-applied, 4-mil PVC coating on exposed surfaces of ducts and fittings (exterior of ducts
Galvanized sheet steel with a mill‐phosphatized finish is used for ducts exposed to view and aluminum sheet is used for concealed ducts. It meets section 5.5 as an exception for resistance to mold growth and erosion. Other duct accessories are made to comply with standard test methods.
1. Exposed-Surface Finish: Mill phosphatized. C. Stainless-Steel Sheets: Comply with ASTMA 480/A 480M, Type 304 except for Lab exhaust, which shall be Type 316. D. Aluminum Sheets: Comply with B 209, Alloy 3003, TemperASTM H14; with mill finish for concealed ducts and standard, 1-side bright finish for exposed ducts.
Galvanized Sheet Steel Lock-forming quality ASTM A653 G90 coating designation mill-phosphatized finish for surfaces of ducts exposed to view Carbon-Steel Sheets ASTM A366 cold-rolled sheets commercial quality with oiled exposed matte finish Stainless Steel ASTM A480 Type 316 sheet form with No 4 finish for surfaces of ducts exposed to view and Type 304 sheet form with No 1 1-1/4 ounces per ...
"Paint Grip" steel is mill phosphatized or galvannealed. o Galvanneal steel is, as its name implies, annealed. This annealing softens the steel, making it more prone to dings and dents. o Mill phosphatized steel has a zinc phosphate coating. Zinc phosphate is considered dangerous to aquatic life and special handling is required at the mill
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Exposed-Surface Finish: Mill phosphatized. Structural Steel Shapes and Plates: Comply with ASTM A36/A36M. Provide zinc rich weldable primer finish unless otherwise scheduled. Acoustical Air Plenums. Duct silencers, with testing-verified performance, can attenuate sound better than many duct design features where performance is only approximated.
coating designation; ducts shall have mill-phosphatized finish for surfaces of ducts exposed to view. C. Stainless Steel: ASTM A 480/A 480M, Type 316, sheet form with No. 4 finish for surfaces of ducts exposed to view; and type 304, sheet form No. 1 finish for concealed ducts.
Exposed-Surface Finish: Mill phosphatized. C. Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 304, and having a [No. 2]
Project specification requirements for paintgrip or mill-phosphatized finishes added to the galvanized coating for exposed ductwork have the ultimate intentions of providing a paintable surface. In theory the "acid" etching of the surface is to provide additional "bite" to the paint and enhances the adhesion of the paint to the underlying surface. Today's high quality latex DTM ...
ANSI/ASTM A 525, G90 zinc coating; mill phosphatized for exposed locations. B. Contact Molded Fiberglass Reinforced Plastic: The National Bureau of Standards "Voluntary Product Standard, PS-15-69" shall form the minimum basis for the fabrication of these FRP exhaust duct .
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2. Exposed-Surface Finish: Mill phosphatized C. Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 304. D. Aluminum Sheets: Comply with B 209 (ASTMASTM B 209M), Alloy 3003, Temper H14; with mill finish for concealed ducts and standard, 1-side bright finish for exposed ducts.
SSPC-SP7/NACE 4: Brush-off blast cleaning to eliminate contaminants visible without magnification; mill scale, coatings, and rust may remain if they cannot be removed with a dull putty knife SSPC-SP10/NACE 2: Near-white blast cleaning to eliminate unmagnified visible contaminants of .
2. Finishes for Surfaces Exposed to View: Mill phosphatized. C. Stainless-Steel Sheets: Comply with ASTM A480/A480M, Type 304 or 316, as indicated in the "Duct Schedule" Article; cold rolled, annealed, sheet. Exposed surface finish shall be No. 2B, No. 2D, No. 3, or No. 4 as indicated in the "Duct Schedule" Article.
Finishes for Surfaces Exposed to View: Mill phosphatized. More details » Get Price. Read SECTION 15815 - METAL DUCTS. Readbag users suggest that SECTION 15815 - METAL DUCTS is worth reading. ... EXPOSED DUCT, WI MILL PHOSPHATIZED FINISH. More details » Get Price. SECTION 07600 - FLASHING AND SHEET ... - City of San Diego. mill phosphatized ...
Insulated Rectangular Ducts Inner Metal Shell Inner Metal Shell Material (if used) Insulation Layer Welds painted (aluminum), labels and markings on outside Outer Metal Shell Gauges Transverse Connectors Surface Preparation / Appearance Welds painted (aluminum), removable labels, no mill or shopmarkings on outside Welds not painted, removable ...
2. Finishes for Surfaces Exposed to View: Mill phosphatized. C. Aluminum Sheets: Comply with ASTM B 209 (ASTM B 209M) Alloy 3003, H14 temper; with mill finish for concealed ducts, and standard, one-side bright finish for duct surfaces exposed to view. D. Factory- or Shop-Applied Antimicrobial Coating: 1.
Galvanizing: 1-1/4 ounces per square foot total both sides; ducts to have mill-phosphatized finish for surfaces exposed to view. C. Stainless Steel: ASTM A 480/A 480M. D. Aluminum Sheets: ASTM B 209 (ASTM B 209M), alloy 3003, temper H14; with mill finish for concealed ducts and standard, 1-side bright finish for exposed ducts.
2. Exposed-Surface Finish: Mill phosphatized. C. Reinforcement Shapes and Plates: Galvanized-steel reinforcement where installed on galvanized sheet metal ducts; compatible materials for aluminum and stainless-steel ducts. D. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inch minimum
This phosphatized (also known as "bonderized" or "phos-bond") has all the corrosion resistant benefits of galvanized but it can be painted. However, this product is only produced by a few domestic mills and thus becoming less and less specified in our industry.
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