Fire-Rated Metal Doors
Overview
Sagiant Piping Industries supplies fire-rated metal doors for commercial, industrial, hospital and infrastructure buildings — single- and double-leaf hollow-metal doorsets in galvanised/CRCA or stainless 304/316 with mineral-wool (rockwool) cores, in 30, 60, 90 and 120-minute classes. The fire rating applies to a specific tested or assessed doorset — leaf, frame, core, intumescent and smoke seals, fire-rated hardware and any fire-glazed vision panel together — referenced to BS 476-22, EN 1634-1 (EN 13501-2 classification) or UL 10C / NFPA 252 for the project route; these standards are not interchangeable. The exact model, classification, test or listing reference and permitted size are confirmed per project.
Fire-rated door types, materials, sizes and fire reference data
Fire-rated hollow-metal doors for commercial, industrial and healthcare buildings. Sagiant Piping Industries / SPI Steel keeps door types, construction materials, sizes, standards and fire data on one page for project teams.
Technical Specification
| Parameter | Specification |
|---|---|
| Product Type | Single / double-leaf hollow-metal fire doors |
| Material | GI / CRCA or SS 304 / 316 skins; pressed-steel frame |
| Core | Rockwool / mineral wool fire core |
| Fire Rating | 30 / 60 / 90 / 120 min (per tested assembly) |
| Seals | Intumescent + cold-smoke seals |
| Hardware | Fire-rated hinges, mortise lock, closer, panic exit device |
| Vision Panel | Optional fire-glazed vision panel |
| Finish | Polyester powder coat (any RAL) or stainless No.4 |
Construction Materials
| Component | Grade / Spec | Use | Finish |
|---|---|---|---|
| Leaf & frame (galvanised / CRCA) | IS 277 / A653 (GI), IS 513 / A1008 (CRCA); skin thickness per the approved doorset drawing | Door leaf face, frame & sub-frame | Polyester powder coat |
| Leaf & frame (stainless) | SS 304 / 316 (ASTM A240) | Door leaf face & frame | Brushed No.4 / 2B, passivated |
| Fire core | Mineral wool (rockwool), per the tested doorset | Leaf infill | Bonded |
| Vision glazing | Certified fire-protective glass, per the tested doorset | Vision panels | Clear |
| Seals | Intumescent + smoke seals | Perimeter & meeting stile | — |
| Finish | Polyester powder coat (approved process) | Leaf & frame | Any RAL, as available |
Fire Door Types
| Type | Description | Typical Use |
|---|---|---|
| Single-leaf fire door | One fire-rated leaf | Rooms, corridors, escape routes |
| Double-leaf fire door | Active + inactive leaves | Wide openings, lobbies |
| Fire door + vision panel | Glazed fire-rated leaf | Corridors needing visibility |
| Double-egress fire door | Opposing-swing leaf pair for bidirectional egress, per the approved doorset | Hospital & high-traffic corridors |
| Acoustic fire door | Fire-rated leaf with a separately evidenced acoustic (Rw) rating for the same assembly | Plant rooms, theatres, studios |
Standards & Specifications
| Scope | Applicable Standards |
|---|---|
| Fire resistance | BS 476 Part 22, EN 1634-1, UL 10C / NFPA 252 |
| Classification | EN 13501-2 (EI / E rating) |
| Smoke leakage | EN 1634-3 or UL 1784 leakage-test evidence (seals alone do not establish performance) |
| Material | ASTM A653 (GI), A240 (SS), pressed-steel sections |
| Finish | Polyester powder coat; ASTM B117 salt-spray is a test method, not a service-life guarantee; SS No.4 |
| India (where applicable) | IS 3614:2021 applicability reviewed; BIS licence details where held |
Testing, Inspection & Documentation
| Test / Document | Detail |
|---|---|
| Fire rating | EN 1634-1 / BS 476-22 / UL 10C furnace test, EI classification |
| Smoke | EN 1634-3 / UL 1784 leakage test where specified |
| Operation | Hinge, lock, closer, panic & self-closing function |
| Finish | Coating thickness (DFT), adhesion, salt-spray |
| Documentation | Fire test / classification report, listing or assessment, approved GA drawing, hardware & glazing schedule |
Applications & Industries Served
Available Forms, Sizes & Range
Sizes below are indicative; the maximum size for each rating follows the model’s test evidence or assessment. Share fire rating, leaf configuration, hardware and vision-panel needs for the tested assembly.
| Item | Indicative size | Leaf thickness | Standard route |
|---|---|---|---|
| Single-leaf door | 750–1200 mm W x 2100–2400 mm H | 46–54 mm leaf | BS 476 / EN 1634-1 / UL 10C |
| Double-leaf door | 1200–2400 mm W x to 2700 mm H | 46–54 mm leaf | BS 476 / EN 1634-1 / UL 10C |
| Vision panel | 300 x 300 to 600 x 900 mm | Fire glazing | — |
Frequently Asked Questions
What fire ratings are available?
Fire-rated metal doors are offered in 30, 60, 90 and 120-minute classes. A rating applies to a specific tested or assessed doorset — leaf, frame, core, seals, hardware and glazing together — so we confirm the exact classification, test standard and report or listing reference for the model and size before supply.
Which test standards apply?
Doorsets are referenced to BS 476-22, EN 1634-1 (with EN 13501-2 classification) or UL 10C / NFPA 252, depending on the project route. These are different test methods and their results are not interchangeable — an EN EI classification is not the same as a UL 10C result — so the applicable standard is agreed per project. For Indian projects, IS 3614:2021 applicability is reviewed.
Is the whole doorset certified, or just the materials?
The fire performance belongs to the complete assembly, not to a material certificate or the core alone. We provide the model's fire test or classification evidence and the approved drawing; material certificates and dimensional inspection support that evidence rather than replace it.
Do fire doors include smoke control?
Smoke (leakage) performance is a separate characteristic from fire resistance, and smoke seals alone do not establish it. Where required, the doorset carries EN 1634-3 or applicable UL 1784 leakage-test evidence, confirmed for the specified configuration.
Can vision panels, hardware and finishes be changed?
Fire-glazed vision panels, fire-rated hinges, locks, closers and panic devices, and powder-coat finishes are supplied as a matched assembly within the tested scope. Changes to glazing, hardware, size or finish must stay within the model's approved or assessed limits — individually rated components do not by themselves make a rated combination.
What sizes are available?
Single and double-leaf configurations are offered within the tested size limits for the rating. Maximum size, leaf thickness, supporting wall and clearances follow the model's test evidence or assessment, so the permitted size is confirmed against the certified configuration rather than scaled up.
Scope of Work
The fire rated metal doors scope can include project review, fabrication support, dimensional coordination, inspection documentation and dispatch support for industrial installations.
Applications
For related project work, review Custom Fabrication, Contact Sales or for technical assistance.
Related Pages
From requirement to dispatch
A drawing-led, inspection-backed process for engineered and fabricated supply — the same discipline on every project.
- 01
Requirement Review
Drawing, BOQ, specification and project scope reviewed to confirm feasibility.
- 02
Design & Specification
Material, method, tolerance and finish aligned to the applicable standard.
- 03
Fabrication Planning
Production planned with inspection and test points built into the sequence.
- 04
Inspection & QA
Dimensional and visual inspection against drawing, with documentation as required.
- 05
Packing & Dispatch
Tagging, packing and dispatch documentation for on-time project delivery.
Frequently Asked Questions
What fire ratings are available?
Fire-rated metal doors are offered in 30, 60, 90 and 120-minute classes. A rating applies to a specific tested or assessed doorset — leaf, frame, core, seals, hardware and glazing together — so we confirm the exact classification, test standard and report or listing reference for the model and size before supply.
Which test standards apply?
Doorsets are referenced to BS 476-22, EN 1634-1 (with EN 13501-2 classification) or UL 10C / NFPA 252, depending on the project route. These are different test methods and their results are not interchangeable — an EN EI classification is not the same as a UL 10C result — so the applicable standard is agreed per project. For Indian projects, IS 3614:2021 applicability is reviewed.
Is the whole doorset certified, or just the materials?
The fire performance belongs to the complete assembly, not to a material certificate or the core alone. We provide the model's fire test or classification evidence and the approved drawing; material certificates and dimensional inspection support that evidence rather than replace it.
Do fire doors include smoke control?
Smoke (leakage) performance is a separate characteristic from fire resistance, and smoke seals alone do not establish it. Where required, the doorset carries EN 1634-3 or applicable UL 1784 leakage-test evidence, confirmed for the specified configuration.
Can vision panels, hardware and finishes be changed?
Fire-glazed vision panels, fire-rated hinges, locks, closers and panic devices, and powder-coat finishes are supplied as a matched assembly within the tested scope. Changes to glazing, hardware, size or finish must stay within the model's approved or assessed limits — individually rated components do not by themselves make a rated combination.
What sizes are available?
Single and double-leaf configurations are offered within the tested size limits for the rating. Maximum size, leaf thickness, supporting wall and clearances follow the model's test evidence or assessment, so the permitted size is confirmed against the certified configuration rather than scaled up.