Overview - ISO 24224:2022
ISO 24224:2022 - Ships and marine technology: Tanker cargo manifold shore connection - Technical requirements specifies the types, structure, dimensions and technical requirements for cargo and vapour manifolds used on oil and chemical tankers. The standard covers flanged manifold assemblies mounted onboard to receive loading arms, hoses or spool pieces and can also be applied to bunker (ship fuel) transfer manifolds at terminals. It includes drawings, tabulated dimensions, material codes and inspection requirements.
Key topics and technical requirements
- Classification: Manifolds are classified by purpose - Type A (cargo, bunker, diesel/gas oil lines) and Type B (vapour lines).
- Structure & dimensions: Prescriptive figures, tables and marking formats define inboard/outboard flange sizes, bolt circles, bolt counts and short pipe lengths for common flange combinations.
- Materials & mechanical properties:
- Material codes: MS (carbon steel) and SST (stainless steel).
- Representative mechanical requirements: carbon steel (ultimate ≈ 415 MPa; yield ≈ 240 MPa; elongation ≈ 29%), stainless steel (ultimate ≈ 515 MPa; yield ≈ 205 MPa; elongation ≈ 35%); maximum carbon ≤ 0.23%.
- Fasteners and fittings per ISO 898‑1 and ISO 3506‑1; gasket materials include NBR, FPM (F) or PTFE.
- Flange facing & sealing: Presentation flanges must be vertical, flat-faced and have machined spiral grooves for gasket contact per ASME B16.5 recommendations.
- Lifting & blind flanges: Lifting lug position is specified near the balance centre; principal manifolds require removable blind flanges with handles.
- Welding & fabrication: Welding permitted between flange and short pipe; full‑penetration welding standards apply.
- Tolerances & finish:
- Length tolerance ±6 mm.
- Flange face verticality ≤ ±0°30′; flange axis offset ≤ 5 mm.
- External edges rounded to ≈ R1.0 mm; smooth finish, no cracks.
- Inspection: Includes hydrostatic testing and marking/identification requirements (annexes cover gasket, lifting lug, studs, marking, blind flange).
Applications and users
ISO 24224 is used for:
- Design and specification of tanker cargo and vapour manifolds for oil and chemical tankers.
- Onboard installation, procurement and quality control of manifold assemblies.
- Terminal manifold design for bunkering and ship-to-shore cargo transfer.
Primary users:
- Ship designers, naval architects and shipyards
- Tanker owners and operators
- Terminal and port engineers
- Manufacturers of flanged manifolds, gaskets and fittings
- Classification societies, inspectors and safety/QA personnel
Related standards
- ISO 23212 (flanged connections for bunker fuel/lubricating oil transfer)
- ASME B16.5 (pipe flanges and flanged fittings)
- ISO 898‑1, ISO 3506‑1 (fastener mechanical properties)
- ASME B31.3 (process piping - referenced for impact testing)
Keywords: ISO 24224:2022, tanker cargo manifold, shore connection, cargo and vapour piping, oil tanker manifold, chemical tanker manifold, flange dimensions, lifting lug, blind flange, gasket, welding, dimensional tolerance.