Jan 19, 2022 · MDOT has two standard painting systems. New structural steel is completely shop painted with a three-coat system, referred to as Type 4S. Existing structural steel is blast cleaned and field coated with a similar three-coat system, referred to as Type 4. The following guidelines should be strictly followed in inspecting these systems. [top of page]. 1. GENERAL - PAINT INSPECTION SERVICES 1.1. SCOPE. 1.1.1 This painting specification and inspection instruction covers the minimum requirements for shop painting, field painting and repair work at site for the surface preparation and paint application to the Un-buried equipment, piping, steel structures, storage tanks, etc., which will be exposed to sea breeze and corrosive environment for use. SSPC-SP 3 is the standard for cleaning and removing loosely inherent material using a power tool, such as a grinder. Photo courtesy of Bass Mechanical, Elizabethtown, Pa. The SSPC is an ANSI-accredited organization, and the consensus standards have been developed through an ANSI process. Bass Mechanical, 717-367-0890, www.bassmechanical.com. Rust Grip® – As a three-coats-in-one system, Rust Grip® acts as a primer, intermediate, and topcoat that strengthens surfaces to 6780 psi (473 bar) after fully curing (almost twice as hard as concrete – 3500 psi by comparison). You can apply Rust Grip® directly over rusted surfaces or existing paint, with no white sandblasting required.. Painting provides a barrier film between the steel and the environment. A paint system involves the use of several layers of coating, and sometimes, different formulations of paint, depending on the type of environment in which the structure will be exposed. The most important factor for the success of paint systems are adhesion and continuity.. From the Fiscal Year 1938/1939 Annual Report: "The largest item in the maintenance budget is for painting of the structural steel. The past fiscal year, the sum of $112,431.84 was expended for painting of the Bridge structures. This amount was divided as follows: Labor, $86,589.13; brushes, tools, etc., $5,430.67; paint, $20,412.64. Zinc-rich epoxy coating - Formulated for steel surfaces, zinc-rich epoxy paint is recommended in applications where high-performance, corrosion-resistant protective coating is required. Besides superior corrosion resistance, the paint is characterized by excellent application, adhesion, fast-drying, and abrasion resistance properties. 1.3.13 MPI System Number 1.3.14 Paint 1.3.15 REX 1.3.16 RIN 1.4 SCHEDULING 1.5 SUBMITTALS ... This specification covers the painting of hydraulic structures located in fresh water such as locks and dams. 3. Section 09 97 13.27 HIGH PERFORMANCE COATING FOR STEEL STRUCTURES. This specification is usable for any steel structure exposed to weather. "/>
Painting system for steel structure
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