Sea water pumps are critical equipment for offshore chemical facilities, tasked with handling corrosive seawater while meeting strict compliance standards. This guide provides practical insights into selecting, installing, and maintaining sea water pumps to ensure durability and regulatory adherence. It covers key factors such as material selection (duplex stainless steel, titanium, FRP), pump design (cantilever, API 610 compliant), sealing systems, chemical compatibility, and flow optimization to prevent erosion-corrosion. Additionally, it outlines best practices for offshore installation, routine inspection, cleaning, lubrication, and proactive replacement of wear parts, along with safety protocols and environmental sustainability tips. Real-world case studies demonstrate successful applications, while guidance on embracing new technologies (smart pumps, automation) helps offshore facilities boost efficiency and reliability. Ultimately, this guide helps offshore chemical operations invest in high-performance sea water pumps that withstand harsh marine environments and ensure long-term compliance and success.