Steel Door
Steel Door
High-quality steel doors from Triple Nine Door, designed for use in buildings, offices, and industrial factories.
Manufactured from electro-galvanized steel and finished with durable powder coating, our steel doors offer superior strength, corrosion resistance, and long-lasting performance.
Suitable for both interior and exterior applications where enhanced security and durability are required beyond standard doors. We offer two main models:
TP1 – Designed for interior applications
TP2 – Designed for exterior use, compatible with a deadbolt lock system for enhanced security.

TP1 Interior steel door |
Interior Steel Door – Product Specifications
Designed for interior applications, manufactured from Zinc Electro-Galvanized steel with a total door thickness of 45 mm.
Structure & Features
• Frame: Made from Zinc Electro-Galvanized steel, 1.6 mm thickness, standard size 2” x 4”
• Hinges: Stainless steel grade 304, 3 mm thickness, corrosion-resistant and suitable for continuous opening and closing
• Surface Finish: Coated with Jotun polyester powder coating, heat-cured for durability, scratch-resistant, rust-resistant, and non-flame-spread finish
Recommended Applications
Suitable for commercial buildings, offices, utility rooms, storage rooms, meeting rooms, and areas requiring basic sound control.
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TP2 Exterior steel door |
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Exterior Steel Door – Product Specifications Designed for exterior applications, manufactured from Zinc Electro-Galvanized steel with a total door thickness of 45 mm. Steel Door Structure & Features • Frame: Made from Zinc Electro-Galvanized steel, 1.6 mm thickness, standard size 2” x 4” • Hinges: Stainless steel grade 304, 3 mm thickness, corrosion-resistant and designed for continuous operation • Surface Finish: Coated with Jotun polyester powder coating, heat-cured for durability, scratch-resistant, and non-flame-spread finish Recommended Applications Suitable for building entrances, warehouses, factories, office buildings, and areas requiring higher levels of security and durability. |
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