Sector·2 min read
Paper and Pulp Mill Fire Safety
Paper and pulp mills combine an enormous fire load (paper, fiber, lint, glue) with high-speed processes: surfaces are hot in the paper machine's drying section, oil and fiber dust (lint) accumulate in the air ducts, hydraulic and lubrication units carry a pressurised-oil fire risk, jumbo reels and high-rack paper storage form a fast-spreading fire, and bleaching and chemical preparation involve hazardous materials such as chlorine/chlorine dioxide. This article covers the real fire risks in paper/pulp mills, the measures to take, and the recommended suppression systems (wet sprinkler/ESFR for drying and storage, deluge/water spray on ducts and hydraulics, spark detection on fiber lines, foam in oil areas).
A-Pro Engineering
Paper and pulp mills combine an enormous fire load (paper, fiber, lint, glue) with high-speed processes: hot surfaces and oil/lint accumulation in the paper machine’s drying section, pressurised-oil fire in hydraulics and lubrication, and a fast-spreading fire in jumbo reels and high-rack storage. This article covers the real risks, measures, and recommended suppression systems.
Risk: high fire load + hot surface
- Paper, fiber, lint, glue — easily ignitable, fast-spreading material,
- Paper machine drying section — hot cylinder surfaces,
- Oil + lint accumulation in air ducts — hidden, fast spread path,
- Hydraulic/lubrication — pressurised-oil-mist fire.
Risk: jumbo reels and high-rack storage
- Paper carries a very high fire load per unit volume,
- Flame rises fast in high racks — ceiling sprinklers alone insufficient,
- ESFR / in-rack sprinkler is required.
Measure: dust/lint management + drying section
- Effective aspiration + regular cleaning of accumulated lint/oil + leak control,
- Wet sprinkler + water spray/deluge for the dry end and air ducts,
- Oil containment + local suppression at hydraulic/lubrication units.
Measure: chemical and fiber lines
- Chemicals such as chlorine/chlorine dioxide in a separate, ventilated area + gas detection,
- Spark detection against foreign objects on fiber preparation/transport lines,
- Foam in oil and flammable-liquid areas.
Recommended suppression and detection systems
| Area / equipment | Recommended system |
|---|---|
| Paper machine drying, air duct | Wet sprinkler + water spray/deluge |
| Jumbo reel / high-rack storage | ESFR / in-rack sprinkler |
| Hydraulic, lubrication unit | Oil containment + local suppression + foam |
| General production hall | Wet sprinkler |
| Fiber preparation/transport | Spark detection |
| Chemical preparation | Gas detection + suitable suppression |
| Electrical, control room | Clean-agent gas |
We covered ESFR in our ESFR article.
Summary
Paper/pulp mill fire safety starts by managing the high fire load: protecting the drying section with wet sprinkler + water spray and lint/oil cleaning, jumbo reels/storage with ESFR, hydraulics with oil containment + local suppression + foam, and the fiber line with spark detection. All are based on NFPA 13/11/2001/30 + NFPA 15 + EN 12845/BYKHY. For a related risk see our wood industry and factory/industrial facility articles. At A-Pro Engineering we design ESFR, water spray/deluge, spark detection, and foam for paper/pulp mills in an integrated way; contact us for your project.
This content is for information purposes. Binding design must be done on a project basis based on fire load, process flow, storage type, and the actual conditions of the facility, together with NFPA 13/11/2001/30, NFPA 15, EN 12845, and the current edition of BYKHY.
© 2027 A-Pro Mühendislik. This is original technical content produced by A-Pro Engineering; all rights reserved. Copying, reproducing or republishing it in whole or in part without attribution and permission is prohibited.
Frequently asked questions
What is the biggest fire risk in a paper/pulp mill?+
The biggest risk is the high fire load: paper, fiber, lint, and glue are easily ignitable, fast-spreading materials. In the paper machine's drying section the cylinder surfaces are hot; if oil and fiber dust (lint) accumulated in the exhaust ducts and on surfaces ignite, flame spreads fast along the ducts. In addition, machine drives, hydraulic, and lubrication units carry a pressurised-oil fire risk. So the risk is both a very high fire load and hot surface/oil accumulation; when these two combine, a small spark can turn into a large fire.
How is the paper machine drying section protected?+
The drying (dry end) section is the machine's most critical fire point due to hot cylinders and accumulated lint and oil. Protection starts with dust/lint management: effective aspiration, regular cleaning of accumulated dust, and control of oil leaks. On top of this, suppression is applied: wet sprinkler and, where needed, water spray/deluge are preferred for the dry end and air ducts, with a special nozzle layout targeting oil/lint accumulation inside the ducts. Local suppression is considered for hydraulic and lubrication units. For early detection, systems suited to dusty environments are used.
Why are jumbo reels and paper storage high-risk?+
Paper carries a very high fire load per unit volume, and in high-rack storage jumbo reels and palletized products form an enormous combustible mass. A fire rises fast within the rack; standard ceiling sprinklers alone are insufficient to cut this rising flame. So ESFR or in-rack sprinklers are used in high-rack paper storage; ESFR suppresses the flame with high-flow droplets and cuts its spread within the rack. Because reel winding gaps and packaging affect fire behavior, storage design is done per product type.
How are hydraulic, lubrication, and chemical risks managed?+
Paper machines use high-pressure hydraulic and large lubrication systems; a hose burst sprays oil as a pressurised mist that ignites easily if it reaches a hot surface. For these units, oil containment, local suppression, and foam where needed are applied. Pulp and bleaching processes involve chlorine, chlorine dioxide, and other chemicals; these are stored in separate, ventilated areas, monitored with gas detection, and addressed within process safety together with fire protection. Spark detection can be applied on fiber preparation and transport lines against foreign-object sparks.
Which suppression systems are recommended in a paper/pulp mill?+
By area: wet sprinkler + water spray/deluge where needed for the paper machine drying section and air ducts; ESFR/in-rack sprinkler for jumbo reels and high-rack paper storage; oil containment + local suppression + foam for hydraulic and lubrication units; wet sprinkler for general production halls; spark detection for fiber preparation/transport lines; gas detection + suitable suppression for chemical preparation areas; clean-agent gas for electrical and control rooms. The right set is designed in an integrated way per fire load and process flow.
Which standards govern paper/pulp mills?+
NFPA 13/EN 12845 (and paper/roll storage approaches) for high-rack storage, NFPA 11 for foam, NFPA 2001 for clean-agent suppression, and NFPA 30 for hydraulics and flammable liquids are the basis. Water spray/deluge applications are designed with NFPA 15. Spark detection and related approaches are considered for fiber/dust lines. In Türkiye, design is based on these standards together with BYKHY. For related topics see our wood industry and factory/industrial facility articles.
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