Marine Stainless Steel Emergency Fire Pump

I. Product Overview

The marine stainless steel emergency fire pump is a core emergency guarantee equipment in the marine fire protection system, specially designed for the complex and harsh marine environment. Its core function is to start quickly and continuously deliver fire-fighting water or fire-fighting foam mixture under emergency working conditions such as failure of the main marine fire pump or fire, so as to ensure the fire fighting needs of various compartments and key areas of the ship. The equipment adopts 304, 316L and other high-quality stainless steel materials to manufacture core water-passing components such as pump body, impeller and valve core, combined with high-strength stainless steel pump shaft and corrosion-resistant sealing components. It has excellent characteristics such as resistance to seawater corrosion, salt spray erosion and high temperature, and can adapt to extreme working conditions such as high humidity, large temperature difference and strong vibration during ship navigation.

As a core part of the marine emergency fire protection system, the marine stainless steel emergency fire pump strictly complies with international and domestic standards such as the International Convention for the Safety of Life at Sea (SOLAS), IMO Fire Test Procedures Code (FTP Code) and GB/T 32146 Marine Centrifugal Fire Pumps. It has obtained certifications from mainstream classification societies such as China Classification Society (CCS) and American Bureau of Shipping (ABS), and is widely used in various ships such as cargo ships, oil tankers, passenger ships, container ships, offshore drilling platforms and yachts, directly related to the life and property safety of the ship, crew and cargo. Compared with ordinary carbon steel or cast iron emergency fire pumps, the characteristics of stainless steel materials make it have lower failure rate and longer service life during long-term marine standby and emergency operation, building a solid line of defense for ship navigation safety.

II. Core Technical Parameters

Flow Rate Range: 3-150 m³/h, which can be customized in grades according to ship tonnage, compartment area and emergency fire protection level. The flow stability error under rated working conditions is ≤±3%, ensuring fire water supply for fire scenes of different scales.

Pressure Range: 0.6-3.5 MPa, with a maximum working pressure of up to 4.5 MPa, which can meet the water supply requirements of high-rise compartments and long-distance fire-fighting pipelines, and ensure the effective spraying of terminal equipment such as fire sprinklers and fire monitors.

Medium Adaptability: It can stably transport fresh water, seawater and fire-fighting foam mixture (AFFF foam, protein foam, etc.); adapt to media with water content ≥95% and impurity content ≤0.2% (particle size ≤1.0mm); the applicable medium temperature range is -20℃ to 150℃, which can meet the needs of high temperature at fire scenes and navigation in low-temperature sea areas.

Material Parameters: Pump body, impeller and valve core are made of 304/316L stainless steel; pump shaft is made of 316L stainless steel (surface hardening treatment); seals are made of fluororubber (FKM) or polytetrafluoroethylene (PTFE), which have excellent compatibility with various fire-fighting media and ensure no leakage during long-term operation.

Drive Mode: Electric drive (three-phase asynchronous motor, Protection Class IP65/IP67) is mainly adopted, and diesel-electric dual drive mode can be optionally configured; electric drive supports marine standard voltages such as 220V/380V/440V, diesel drive can start quickly without external power supply, and the drive system is equipped with overload, overheating, low oil level and phase loss protection functions.

Operating Performance: Self-priming height ≥5 m, self-priming time ≤25 seconds (at a suction lift of 4m); emergency start-up time ≤8 seconds, with fast response speed, which can quickly connect with fire alarm signals; operating noise ≤72 dB(A), vibration acceleration ≤1.2 m/s²; volumetric efficiency ≥92%, low energy consumption, and continuous operation ≥24 hours.

III. Structural Design and Core Advantages

3.1 Core Structural Design

Full Stainless Steel Core Structure: Core water-passing components and external protective shells are all precision-cast/forged with integrated stainless steel. The inner wall of the flow channel is smooth and burr-free, which not only reduces water flow resistance and pressure loss, but also avoids rust and scaling problems caused by the reaction of ordinary metal materials with seawater and fire-fighting agents; the surface of stainless steel has good anti-biofouling performance, preventing marine organisms from accumulating in pipelines and pump chambers, and ensuring unobstructed water flow during emergency start-up.

Efficient Sealing and Anti-Leakage System: Adopts "mechanical seal + O-ring + metal gasket" triple sealing structure, the sealing surface is made of silicon carbide-graphite composite material, with excellent wear resistance and high temperature resistance, and the leakage rate ≤0.002 mL/h; equipped with sealing pressure monitoring and alarm device, which can give real-time early warning when the sealing performance decreases, avoiding leakage failure under emergency working conditions.

Compact and Vibration-Resistant Emergency Design: The pump body and drive unit adopt an integrated compact layout, with small volume and light weight (20-380 kg), suitable for installation in narrow emergency pump cabins of ships; the base is equipped with high-strength shock-absorbing rubber pads and anti-loose anchor bolts, which can effectively offset the vibration during ship navigation and fire working conditions, avoid resonance with the hull structure, and ensure operational stability.

Intelligent Emergency Control Module: Equipped with a dedicated emergency control box, supporting manual/automatic dual start-up modes, which can be linked with the ship's fire alarm system to realize automatic and rapid start-up after fire alarm; equipped with an operation status monitoring display screen, which can display key parameters such as flow rate, pressure and temperature in real time, automatically record and alarm when a fault occurs, facilitating rapid troubleshooting by crew.

3.2 Core Technical Advantages

Superior Corrosion Resistance: 304/316L stainless steel materials have extremely strong corrosion resistance to seawater, salt spray, acid and alkali fire-fighting agents. After 6000 hours of seawater immersion test, there is no obvious corrosion or pitting. Its service life is 4-5 times that of ordinary cast iron emergency fire pumps, which greatly reduces marine operation and maintenance costs and replacement frequency.

Rapid Emergency Response: The optimized hydraulic design matches the drive system to ensure that the emergency start-up time is ≤8 seconds, far exceeding the industry average; under the harsh working conditions of ship heel (±35°) and trim (±25°), it can still maintain stable flow and pressure output, ensuring rapid fire control in the early stage of fire.

High Safety and Reliability: Full coverage of multiple safety protection devices, which can deal with various abnormal working conditions such as overload, overheating, phase loss, low water level and pipeline blockage; electrical components comply with marine explosion-proof standards (Ex d IIB T4), suitable for flammable and explosive areas such as engine rooms; stainless steel materials have excellent high temperature resistance, and can operate short-term in high-temperature environments at fire scenes to ensure continuous fire fighting.

Convenient Maintenance and Wide Adaptability: Key components adopt modular design, wearing parts (seals, filter screens, etc.) can be quickly disassembled and replaced without disassembling the entire pump body; daily maintenance only needs to regularly clean the filter screen and check the sealing status, without professional tools, and the maintenance time is ≤20 minutes; it can adapt to various harsh marine environments such as high salt spray, high humidity, low temperature and high temperature, covering all types of ships.

Strong Environmental Compliance: The stainless steel materials and seals used all comply with the environmental protection requirements of Annex VI to the IMO MARPOL Convention, and do not contain harmful heavy metals such as lead and mercury; no leakage during operation, avoiding marine environmental pollution caused by leakage of fire-fighting water and chemical agents, and meeting the needs of green ship navigation.

IV. Typical Application Scenarios

4.1 Emergency Backup for Main Marine Fire Pumps

When the main marine fire pump fails to work normally due to failure, damage or fire, the marine stainless steel emergency fire pump can be quickly and automatically switched on to take over the main pump to complete the fire-fighting water supply task, ensuring the uninterrupted fire protection system, striving for critical time for fire fighting, and serving as the "last line of defense" for the marine fire protection system.

4.2 Emergency Fire Fighting in Engine Rooms

As the core of the ship's power, the engine room contains a large amount of fuel oil, lubricating oil and electrical equipment, and is a high-fire-risk area. The marine stainless steel emergency fire pump can quickly provide high-pressure fire-fighting water or foam mixture for the engine room fire sprinkler system and fixed fire monitors, accurately cooling down and extinguishing fire hazards such as engines, fuel pipelines and electrical control cabinets; its vibration resistance and high temperature resistance can adapt to the complex working conditions of the engine room, ensuring continuous and reliable water supply.

4.3 Emergency Fire Fighting in Cargo Holds and Decks

For fires in container holds, crude oil holds and deck areas of cargo ships and oil tankers, the marine stainless steel emergency fire pump can deliver a large amount of fire-fighting water or foam mixture through mobile deck fire monitors and foam generators, quickly covering the fire area and inhibiting the spread of fire; its excellent seawater corrosion resistance allows direct use of seawater as the fire-fighting water source, adapting to the fire fighting needs of open marine areas.

4.4 Emergency Protection in Public Areas of Passenger Ships

Public areas such as passenger cabins, restaurants and corridors of passenger ships are densely populated, and fire fighting needs to balance rapid fire control and personnel evacuation. The marine stainless steel emergency fire pump provides stable low-to-medium pressure fire-fighting water for the fire sprinkler system and fire hydrants in this area, quickly cooling down and inhibiting smoke diffusion, striving for time for personnel evacuation; its low-noise operation characteristic can reduce environmental interference at the fire scene and improve evacuation safety.

4.5 Emergency Fire Fighting on Offshore Platforms

Offshore drilling platforms and oil production platforms face extreme environments such as high salt spray, strong vibration and flammable and explosive media, with strict fire protection requirements. The marine stainless steel emergency fire pump can be adapted to the platform emergency fire protection system, providing high-pressure and stable water supply for fire monitors and foam fire extinguishing systems. Its explosion-proof, corrosion-resistant and rapid start-up characteristics can effectively respond to emergencies such as platform equipment leakage and fire, ensuring the safety of platform personnel and equipment.