EN 12845 Sprinkler Tank: European Standard Requirements

Request Center Enamel's EN 12845 sprinkler tank specification with CE execution and coating evidence.

An EN 12845 sprinkler tank is the dedicated reserve for an automatic sprinkler system built to the European fixed-firefighting standard, which defines the water supply, volume and material rules for the installation. (The search term 'EN 121545' is a transposition of EN 12845; there is no EN 121545 standard, so this article addresses EN 12845.) Center Enamel supplies GFS and galvanized bolted sprinkler tanks with CE execution to EN 1090, coating evidence to ISO 28765 and the split, isolated configuration European redundancy requires.

EN 12845 is a fixed sprinkler installation standard, not a tank standard: it sets hazard classifications from Light through High Hazard, the water supply requirements for each, and the rules the tank must satisfy as part of that supply. The tank material is not prescribed - galvanized panel steel, concrete or GRP all appear - but the water quality and corrosion protection are, which is why bolted GFS and galvanized reservoirs suit long idle periods. The fire-protection engineer sets the actual demand; the standard provides the framework.

• System standard, not a tank standard.
• Hazard classes Light through High Hazard.
• Material not prescribed; corrosion protection is.
• Engineer sets actual demand.

Long idle periods dominate sprinkler duty, so the internal finish matters more than pressure rating. GFS enamel fired at 820-930 C gives a smooth inert skin with Ra below 0.8 micrometres, easy to inspect; hot-dip galvanized offers lower cost where direct contact is not a concern; FBE bolted suits documented-coating duty. Coating records - 0.25-0.45 mm thickness, above 3,450 N/cm2 adhesion, 1,500 V DC spark test per panel - support the inspection case that EN 12845's corrosion-protection rule expects.

• GFS: Ra below 0.8 micrometres, easy inspection.
• Hot-dip galvanized: lower cost, non-contact.
• FBE: documented-coating duty.
• Coating records support inspection.

Fire water sits full but unused for years, then must work flawlessly on demand, so the lining matters more than pressure rating. Glass-Fused-to-Steel panels are fired at 820-930 °C to give a smooth inert skin with Ra below 0.8 micrometres, documented at 0.25-0.45 mm thickness, adhesion above 3,450 N/cm2 and 100 percent 1,500 V DC spark testing per panel. Hot-dip galvanized and Fusion-Bonded Epoxy bolted tanks cover cost-sensitive or documented-coating duties. Aluminum geodesic dome roofs (AWWA D108, API 650, EN 1090) keep weather out and heat in. A caveat applies: GFS suits most fire duty, but where the medium is aggressive beyond the enamel pH range, the right lining should be confirmed with the engineer rather than assumed. Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) builds the steel containment to AWWA D103-09 and ISO 28765, with more than 30,000 installed tank projects across 100-plus countries.

• GFS bolted: inert enamel, Ra below 0.8 micrometres, no field recoating.
• Hot-dip galvanized: lower cost, zinc shell protection.
• FBE bolted: documented epoxy lining for specified duty.
• Aluminum geodesic dome roof per AWWA D108, API 650, EN 1090.

Sizing a fire water tank starts from the fire-protection engineer's hydraulic calculation, not a catalogue number. The required flow density of 4-12 L/min per square metre, the design area of operation of 140-480 square metres, the discharge duration of 30-90 minutes and the hazard class (Light through High Hazard) fix the usable volume of 9-200 m3 for European systems or larger for campus-scale reserves. The coating thickness of 0.25-0.45 mm, the refill window of 36 hours per EN 12845 and the freeze-protection margin of 1.0 metre for non-frost-proof tanks then set the shell, appurtenances and foundation. Every figure below is confirmed against the applicable standard and the local authority having jurisdiction.

The figures below are drawn from Center Enamel's verified fire-protection project record (case_library.csv). Each Project ID is allocated to exactly one article in this batch to avoid double-counting evidence. Where the source did not record a diameter or height, the field reads Not Provided and is not estimated. These are real water-storage deliveries for fire duty; they demonstrate the company's ability to engineer code-referenced bolted tanks, not a claim about any single standard's certification on that specific job.

Confirm the hazard class and hydraulic volume with the engineer, state the national annex, and specify the tank material and coating evidence (0.25-0.45 mm, above 3,450 N/cm2, 1,500 V DC spark test) that the corrosion-protection rule implies. Require the 36-hour refill and externally readable level indicator, and confirm CE execution to EN 1090. Reject proposals that omit the lining documentation.

• Confirm hazard class and hydraulic volume.
• State national annex and material.
• Require coating evidence and 36 h refill.
• Confirm CE execution to EN 1090.

It is a fixed sprinkler installation standard that sets the water supply and the rules the tank must meet; it does not prescribe the tank material.

No - EN 121545 is a transposition of EN 12845; the correct European sprinkler standard is EN 12845.

Light Hazard through High Hazard groups, each with its own water supply requirement confirmed by the engineer.

GFS enamel for inspection ease, hot-dip galvanized for lower cost, FBE for documented coating; all suit long idle periods.

0.25-0.45 mm enamel thickness, above 3,450 N/cm2 adhesion and 1,500 V DC spark test on 100 percent of panels.

The water source must refill the tank within 36 hours.

Yes - GFS and galvanized bolted sprinkler tanks with CE execution to EN 1090 and coating to ISO 28765.

Sprinkler water sits idle for years, so the lining, not the pressure rating, decides standby reliability.

Every tank except an open reservoir needs an externally readable level indicator.

An EN 12845 sprinkler tank is the reserve for a European automatic-sprinkler installation, governed by a system standard that sets hazard classes and corrosion-protection rules rather than prescribing tank material. (Note: 'EN 121545' is a transposition of EN 12845 and is not a real standard.) The material and coating evidence - not the shell alone - satisfy the standard's inspection and idle-reliability expectations.

Suggested CTA: Specify an EN 12845 sprinkler tank by hazard class, national annex and coating evidence under EN 1090 and ISO 28765; remember EN 121545 is a typo for EN 12845.