Corrosion Resistant Paint Coated Cast Steel GOST Globe Valve

Hanno's Corrosion Resistant Paint Coated Cast Steel GOST Globe Valve combines a 25L carbon steel or stainless steel body with a multi-layer epoxy barrier finish. Complying strictly with GOST 5762 and GOST 33259 standards, the valve features a 2Cr13 or 12Cr18Ni9Ti stainless steel stem driving a hardfaced disc, providing dependable, long-term fluid isolation across aggressive chemical environments.

External Heavy-Duty Protection System

Industrial valves installed in coastal refineries, offshore platforms, or fertilizer plants suffer rapid atmospheric corrosion. Unprotected carbon steel shells develop severe rust scale, leading to flange wall thinning, body pitting, and frozen bonnet bolting that prevents field maintenance. Hanno solves atmospheric degradation through an industrial surface coating protocol:

• SA 2.5 Automated Surface Shot-Blasting: Before painting, every cast steel body and bonnet undergoes high-velocity shot-blasting to achieve an SA 2.5 surface cleanliness standard per ISO 8501-1. This process strips all heat scale, oxide film, and foundry sand, generating an anchor profile that guarantees mechanical paint adhesion.

• Multi-Layer Epoxy & Polyurethane Coating System: Hanno applies a two-pack zinc-rich epoxy primer followed by a high-build intermediate epoxy coat and a glossy polyurethane topcoat. This coating system creates a dense 250 to 350 micron protective barrier that resists continuous salt fog exposure, acid/alkali vapors, and solar UV degradation.

• Precision Flange Masking Protocol: Overspray on flange raised faces ruins gasket sealing integrity. Hanno utilizes custom precision rubber covers to mask all flange raised faces, bolt holes, and internal fluid cavities during shot-blasting and painting, preserving clean gasket contact surfaces.

Coating Properties

Coastal Process Applications

• Offshore & Coastal Refineries: Marine crude unloading terminals, coastal tank farm isolation, and seawater cooling loops (Petronas projects).

• Chemical Processing Plants: Chlor-alkali facilities, fertilizer works, acid mist wash areas, and industrial wastewater lines.

• Mining & Metallurgical Utilities: Tailings processing, acid leaching fluid circuits, and corrosive slurry wash lines.

Frequently Asked Questions (FAQ)

Can Hanno Corrosion Resistant Paint Coated Cast Steel GOST Globe Valve apply custom RAL colors or client-specified paint specifications?

Yes, we apply custom RAL color codes, marine-grade NORSOK M-501 epoxy coating systems, or high-temperature silicon coatings based on client project documentation.

What internal stainless steel material options are available for aggressive media?

We manufacture bodies and trims in 12Cr18Ni9Ti, 12Cr18Ni10Ti, 12Cr18Ni12Mo3Ti, 904L, and Duplex Steels (4A, 5A, 6A) for severe acid or chloride service.

How does Hanno verify coating quality before shipment?

Quality technicians perform 100% Dry Film Thickness (DFT) gauge checks, cross-hatch paint adhesion tests (ISO 2409), and pinhole holiday testing on every coated batch.