Learning chapter

Pipelines & Valves

7 lessons

The ship’s plumbing: bilge, ballast and bunkering lines, water hammer, globe/gate/butterfly valves and sea-chest care — failures included.

This chapter collects 7 illustrated lessons on Pipelines & Valves as part of Auxiliary Machinery & Shipboard Systems, ordered as they are best studied. It opens with Ship Pipelines — Seawater, Bilge, Ballast & Fuel Systems, Globe, Gate & Non-Return (SDNR) Valves: Working, Troubleshooting & Overhaul, Butterfly Valves: Working, Construction, Troubleshooting & Overhaul, Sea Chests (High/Low Suction) & Marine Growth Prevention (MGPS), Sea Chest Strainers: Construction, Standby-First Changeover & Safe Cleaning, Pipe Corrosion, Water Hammer & Failure Response and 1 more. Each lesson is written for MEO oral and written preparation: definitions first, then how the system behaves, then the checks and figures used in practice.

Explore the lessons

01 Ship Pipelines — Seawater, Bilge, Ballast & Fuel SystemsShip pipeline systems explained: seawater cooling circuit, bilge vacuum loss and leak testing, ballast operations, fuel bunkering and transfer, heating coils, air vents and sounding-pipe flooding danger.4 sections 02 Globe, Gate & Non-Return (SDNR) Valves: Working, Troubleshooting & OverhaulMaster shipboard valve engineering: globe throttling, gate isolation, screw-down non-return (SDNR) valves, seat lapping, wire-drawing diagnostics, repacking, and pressure testing.6 sections 03 Butterfly Valves: Working, Construction, Troubleshooting & OverhaulLearn butterfly valve working principles, resilient seat liner replacement, stem roll pin renewal, diverter temperature control, and step-by-step overhaul.4 sections 04 Sea Chests (High/Low Suction) & Marine Growth Prevention (MGPS)Learn high and low sea chest selection, grating flow criteria, blowdown connections, standby-first changeover procedure, and electrolytic copper-aluminium MGPS.5 sections 05 Sea Chest Strainers: Construction, Standby-First Changeover & Safe CleaningLearn sea chest strainer construction, differential pressure limits, standby-first changeover protocol, flooding safety, and basket cleaning.5 sections 06 Pipe Corrosion, Water Hammer & Failure ResponsePipe corrosion and failure explained: pitting, galvanic series, erosion vs abrasion, fatigue, water hammer warming procedure, expansion joints, and burst-pipe response by fluid on ships.4 sections 07 Steam Traps, Pressure Reducing Valves (PRVs) & Condensate DrainageMaster marine steam traps, pilot-operated pressure reducing valves (PRVs), thermodynamic disc traps, bimetal traps, water hammer physics, and steam line drainage for MEO examinations.8 sections