Marine oil transfer hose is a heavy-duty flexible pipeline specially used for crude oil, fuel oil and hydrocarbon medium transmission in marine environments. It is divided into two main types: API 17K bonded flexible hoses for permanent production on subsea and platforms, and OCIMF standard floating loading hoses for ship-to-ship and ship-to-shore oil delivery. Compared with rigid steel pipes, it can adapt to wave sway, seabed displacement and high saltwater corrosion, and is widely matched with FPSO, fixed offshore platforms, subsea production systems and oil tankers for oil conveying work.

### 1. Multi-layer Composite Structure Standard marine oil transfer hose adopts an integrally vulcanized multi-layer structure made of marine anti-corrosion raw materials: 1. Inner lining: Oil-resistant HNBR, PVDF or UPE material, which resists erosion of crude oil, hydrogen sulfide and carbon dioxide acidic media, with ultra-low permeability to avoid pipe swelling; the conductive inner layer eliminates static electricity to prevent fire hazards. 2. Reinforcement layer: Multi-layer high-strength copper-plated spiral steel wire and polyester fiber braided structure, which can withstand working pressure up to 7500 psi for deep sea projects; the suction floating hose is additionally equipped with steel wire spiral to prevent pipeline collapse under negative pressure. 3. Outer protective layer: Flame-retardant neoprene rubber mixed with anti-ozone and anti-ultraviolet additives, resisting long-term seawater splashing and coastal aging; heavy-duty models can be fitted with stainless steel interlocking armor to prevent friction scratches on gangways and seabed. 4. End fittings: Duplex anti-sulfur steel flanges integrally vulcanized with the hose body, equipped with integrated bending stiffeners to avoid sharp bending blockage at both ends of the pipeline.

### 2. Core Performance Advantages - Excellent dynamic fatigue resistance: It can bear decades of reciprocating swing, torsion and pressure pulsation caused by ocean waves without interlayer separation, cracking or medium leakage, with a design service life of more than 20 years. - Wide temperature adaptation range: Stable performance from -30℃ to +105℃, suitable for cold polar offshore areas and high-temperature production decks. - Outstanding corrosion resistance: Far superior to carbon steel pipes in salt water and sulfur resistance, reducing the frequency of subsea pipeline maintenance and excavation costs. - Flexible layout performance: Easy to construct in narrow equipment gaps, seabed buried areas and cross-platform gangways, cutting the overall offshore construction cost.

### 3. Main Classification and Application Scenarios 1. API 17K Production Transfer Hose (Jumper / Gangway / Buried Pipe) Used for long-term offshore oil and gas production: subsea jumper pipelines connecting manifolds and subsea trees, gangway crossing hoses between FPSO and fixed platforms, seabed buried pipelines for crude export and water injection circulation. 2. OCIMF Floating Loading Transfer Hose Used for temporary mooring transmission: ship-to-ship oil delivery, crude loading and unloading between tankers and platforms, floating buoy oil export pipelines, single and double carcass structure with built-in leakage detection system, meeting GMPHOM 2009 specifications. 3. Auxiliary Marine Oil Transfer Hose Small-caliber fuel supply pipelines for drilling rigs, hydraulic oil conveying hoses and chemical agent injection pipelines on production decks.

### 4. Strict Procurement and Certification Standards - Deep sea production hoses need complete official API Spec 17K certification marks; floating loading hoses require OCIMF, DNV or ABS classification society certification. - Factory mandatory tests: hydraulic burst test, long-term pulse fatigue test, flame retardant test, seawater aging test and acidic medium corrosion resistance test. - Ordinary industrial oil hoses without marine certification are forbidden to be used in offshore operations, otherwise oil leakage, marine pollution and huge production shutdown losses will occur.

In summary, marine oil transfer hose is the key transportation channel of the global marine oil and gas industry. Adopting certified high-quality marine oil transfer hose can realize safe long-term crude transmission under extreme marine dynamic and corrosive conditions, and greatly reduce the full-cycle operation and maintenance cost of offshore projects.