Marine Cast Iron Emergency Fire Pump

I. Product Overview

Marine cast iron emergency fire pumps serve as the last line of defense for ship safety systems, specifically designed for sudden emergencies like fires and leaks. Constructed with high-strength ductile iron (QT400-18) or gray cast iron (HT250), they enable reliable high-pressure firewater delivery under emergency conditions through the centrifugal pump principle. When the ship's main power or primary fire protection system fails, the pump can be activated by an independent diesel engine, battery pack, or hydraulic drive, rapidly pressurizing firewater and delivering it to monitors, sprinkler systems, or foam mixing units. The pump body undergoes integral casting and epoxy resin heavy anti-corrosion coating, ensuring a corrosion-resistant service life of over 12 years in seawater, strictly complying with IMO International Code for Fire Safety Systems (FSS Code) and classification society certifications (LR, ABS, etc.), widely used in merchant ships, oil tankers, offshore platforms, and other marine facilities.

II. Core Technologies and Material Characteristics

1.Cast Iron Material Selection and Performance

2.Key Technical Parameters

Flow range: 30-300m³/h, suitable for 500-30,000-ton vessels

Head: 50-120m, meeting the international standard for fire monitor effective range ≥60m

Emergency start-up: Diesel drive start-up time ≤30s, battery drive response time ≤15s

Corrosion resistance design: Epoxy resin coating thickness ≥300μm, 1,500-hour salt spray test passed without rust

Environmental adaptability: Stable operation in extreme temperatures of -25℃~80℃

III. Technical Advantages and Innovative Design

1. Extreme Condition Reliability

Dual-power redundancy system: Standard-equipped with diesel engine and battery dual power sources, automatically switching when main power fails to ensure continuous operation ≥4 hours.

Anti-overturning structure: Adopts seismic base and reinforced bracket design, maintaining stable operation under ship heel 30° and trim 15°.

2. Rapid Response and Efficient Output

Direct-coupled impeller design: Reduces transmission loss and improves start-up efficiency, with maximum instantaneous flow reaching 1.3 times the rated value.

Large-diameter flow channel: 20% increased diameter of flow-through components, passing ≤5mm particulate impurities to avoid clogging affecting emergency drainage efficiency.

3. Long Life and Easy Maintenance

Wear-resistant coating process: Impeller surface treated with ceramic spraying, 4x improved wear resistance and service life exceeding 30,000 hours.

Modular quick-release structure: Pump body and pipelines use quick-connect flanges, reducing single-component replacement time by 50% and maintenance costs by 35%.

IV. Typical Application Scenarios

1. Ship Fire Emergency

Oil tanker explosion protection: Equips 300,000-ton oil tankers with two parallel emergency pumps, total flow ≥500m³/h, rapidly suppressing deck oil fires.

Passenger ship evacuation support: Cruise ship emergency pumps with automatic sprinkler systems, flow 120m³/h, controlling fire in the initial stage to ensure passenger evacuation safety.

2. Offshore Platform Safety

Drilling platform fire protection: Provides explosion-proof emergency pumps for offshore drilling platforms, head 100m, addressing fire risks from natural gas leaks.

Platform oil spill treatment: Works with foam generators to spray mixed seawater and foam, effectively covering oil spill areas to prevent fire spread.

3. Port and Engineering Vessel Rescue

Port tugboat support: Emergency pumps on tugboats can supply water across vessels, single pump flow 80m³/h, assisting in firefighting for surrounding ships.

Engineering vessel emergency response: Emergency pumps on dredgers, crane ships, etc., meet SOLAS convention requirements, combining fire protection and emergency drainage functions.

V. Selection and Maintenance Specifications

1. Key Selection Parameters

Ship type: Choose ductile iron explosion-proof type for oil tankers/LNG carriers, gray cast iron economical type for inland vessels

Emergency requirements: According to IMO, ≥25m³/h flow per 1,000 GT is required; recommend selection with 1.8x safety factor

Environmental conditions: Choose electric tracing type for cold seas, extra-reinforced coating pump body for high-salinity environments

2. Maintenance Key Points

Daily monitoring: Weekly check of diesel engine fuel reserve, battery power, and pump body sealing

Regular maintenance: 15-minute trial operation monthly, lubricating oil replacement quarterly, coating integrity inspection annually

In-depth maintenance: Hydraulic pressure test (1.5x rated pressure) every 3 years, replacement of aging seals and bearings

VI. Compliance and Certification

International standards: Complies with IMO FSS Code Chapter 5 and SOLAS Convention Chapter II-2 emergency fire protection requirements

Classification society certifications: Certified by LR, ABS, DNV GL, and other authoritative institutions

Explosion-proof certification: Optional ATEX Zone 1/2 explosion-proof grade, meeting usage requirements in hazardous areas