Our general filing cabinet guide makes a point worth repeating on its own: a standard steel filing cabinet is not fireproof, no matter how heavy or solid it feels. Genuine fire protection is a specific, tested, dedicated product category. This guide covers what actually makes a cabinet fire-resistant, which rating standards matter, and how to tell a real fire-rated cabinet from one that just looks sturdy.
Fire resistance in a filing cabinet comes from a dedicated insulating layer sandwiched between an outer steel shell and an inner steel liner — not from steel thickness or overall weight. During a fire, this insulation layer slows heat transfer to the interior, keeping the contents below a critical temperature for a tested, rated duration. A heavy-gauge standard filing cabinet without this insulation layer conducts heat efficiently through solid steel and offers its contents minimal genuine protection, however solid it feels when you close the drawer.
This is the single most common buying mistake covered in our general filing cabinet guide, worth restating here: weight and steel thickness are not reliable indicators of fire resistance. The insulation layer is invisible from the outside — ask directly, and ask for the actual fire-test rating, not just a description of the steel gauge.
Several fire-testing standards exist internationally, and they are not automatically interchangeable, which matters if a project specification names a particular one.
India's standard for fire-rated doorsets and storage, tested up to 120 minutes at rated performance. This is the standard our own fireproof range is manufactured and tested to.
UL Class 350 indicates the cabinet's interior stays below 350°F (roughly 177°C) for the tested duration — the relevant threshold for paper, which chars at a broadly similar temperature. UL Class 125 and Class 150 are stricter ratings for digital media (hard drives, tapes, USB storage), which is damaged at meaningfully lower temperatures than paper. A cabinet rated safe for paper documents is not automatically safe for digital media stored alongside them — these are different, more stringent ratings, and a genuinely mixed-media archive needs a cabinet actually tested and rated for media, not just paper.
A 1-hour rating is standard for general office fireproof cabinets; 2-hour ratings offer a higher margin, worth considering for critical, irreplaceable records, buildings with longer realistic emergency-response times, or higher fire-risk environments.
A fireproof filing cabinet holds meaningfully fewer files than a standard cabinet of the same external dimensions, because the insulation layer between the outer and inner shell takes up real wall thickness — commonly reducing usable interior drawer space by a noticeable margin compared to the exterior footprint. This is a genuine trade-off buyers should plan for, not a manufacturing shortcoming: a fireproof cabinet sized to match your current filing volume by exterior dimensions alone will likely hold less than expected once the insulated walls are accounted for. Specify by required interior capacity, not exterior footprint, and confirm actual interior drawer dimensions before ordering — don't assume a fireproof cabinet matches the file capacity of a similarly-sized standard cabinet.
| Rating Type | What It Protects | Typical Threshold |
|---|---|---|
| IS 3614 (India) | Fire-rated doorsets & storage | Up to 120 minutes |
| UL Class 350 | Paper documents | Interior stays below ~177°C |
| UL Class 125 / 150 | Digital media | Stricter, lower threshold than Class 350 |
Our fireproof storage range is manufactured and fire-rated to Indian IS 3614 standards, up to 120 minutes. IS 3614 and the older BS 476 Part 22 standard are widely accepted across Commonwealth markets, but EN 1634-1 and UL 10C/UL Class ratings use different, more demanding test methods and are not automatically equivalent to IS 3614 certification. If your project specifically requires EN, UL or another international certification, contact us before ordering to discuss testing and certification options — we won't imply an equivalence that isn't independently verified.
Fire-rated cabinets cost meaningfully more than standard filing cabinets, so specifying them for every drawer in an office wastes budget without adding real protection where it doesn't matter. A useful filter: does losing this specific record set to fire create a genuine, hard-to-recover problem — legal exposure, an irreplaceable original, a statutory retention obligation — or is it recoverable from a digital backup, a duplicate held elsewhere, or simply not critical if lost? Records worth the fire-rated premium typically include: original signed contracts and legal agreements, statutory company records (incorporation documents, land/property records, tax filings beyond digital backup), original financial instruments, and archival records with no digital backup. Day-to-day working files that exist in digital form elsewhere generally don't need fire-rated storage — a standard filing cabinet, correctly specified per our general guide, is the right and more cost-effective choice for those.
It's also worth being realistic about where office fire risk actually originates: electrical faults, overloaded wiring and equipment failure are consistently the leading causes of office fires, not external hazards — meaning fire-rated storage is a genuinely relevant precaution for most offices with real electrical load (server rooms, dense equipment areas, older wiring), not just for buildings in unusually high-risk locations or industries.
Fire-rated filing cabinets and storage units cost meaningfully more than standard filing cabinets due to the insulation layer and testing involved — contact us with your record type, volume and required rating for an accurate quote rather than assuming standard filing-cabinet pricing applies. We manufacture against corporate bulk orders and government/GeM-routed purchase orders, with typical factory lead times of 4-6 weeks from confirmed specification.
The Royal Safe Company manufactures fireproof and fire-resistant storage — including filing cabinets and record storage — fire-rated to Indian IS 3614 standards up to 120 minutes. For projects specifically requiring EN 1634 or UL certification, contact us before ordering to discuss options honestly rather than assuming equivalence. Delhi factory-direct, GeM and government PO accepted. Contact sales@royalsafeco.com for a quote.
IS 3614 is the relevant Indian standard for fire-rated storage and doorsets, tested up to 120 minutes. Internationally, UL Class ratings (Class 350 for paper, Class 125/150 for digital media) and duration ratings (1-hour, 2-hour) are common, particularly in US-sourced products. These use different test methods and are not automatically equivalent — if a specific certification is a hard requirement for your project, confirm which standard is actually needed before ordering.
No. Paper generally chars around 175-200°C, so paper-rated fire protection allows a higher internal temperature than media-rated protection. Digital media is damaged at much lower temperatures, so a cabinet rated safe for paper is not automatically safe for digital media — these require separate, more stringent ratings.
No. Fire resistance comes from a dedicated insulating layer between an outer and inner steel shell, tested under real fire conditions — not from steel thickness alone. A heavy-gauge standard filing cabinet without this insulation layer offers minimal genuine fire protection, regardless of how solid it feels.
Our fireproof storage range is manufactured and fire-rated to Indian IS 3614 standards, up to 120 minutes. We do not currently hold UL or EN 1634 certification — if your project specifically requires one of those certifications, contact us before ordering to discuss testing and certification options rather than assuming equivalence.
Yes. We supply fireproof and fire-resistant storage against corporate bulk orders as well as government, PSU and GeM-routed institutional purchase orders.