Bulk hold preparation + cleaning standards

Bulk carriers are the largest employment segment in shipping. The Chief Officer's standing challenge between voyages is preparing holds to a standard that will pass the NCB or nominated surveyor's pre-loading inspection. Failure means the Notice of Readiness is invalid + the ship is off-hire until re-inspection — on a Panamax at $25k/day, hours matter. This page covers the four standard grades, the procedure per grade, the worst cargo transitions, and the master + Chief Officer duties from cargo discharge to NOR-ready.

The four cleanliness grades

Grade	Requirement	Typical use
Load-on-top (LOT) / Cargo-clean	No residue that will damage the next cargo	Same-cargo continuous voyage; coal-to-coal, iron-ore-to-iron-ore
Normal-clean	Swept + hosed + dry; visible cargo residue removed	Cross-cargo but not sensitive (coal-to-fertilizer, non-food)
Shovel-clean	Normal-clean + no visible bilge / paint damage / rust flakes	Sensitive but not food (fertilizer-to-wood, some concentrates)
Grain-clean	Swept + washed + fresh-water rinsed + fully dry + no rust + clean bilge suctions	Grain, sulphur, wood pellets, non-food concentrates for premium markets
Hospital-clean (or food-grade)	Grain-clean + solvent-degreased + chlorine-tested + odour-free	Human-consumption grain, rice, edible oils (rare)

Grain-clean procedure (typical Panamax)

Post-discharge sweep. Hold crew sweep every bulkhead + deckhead + tank-top corner. Small residual piles collected + discharged. ~4 hours per hold.
High-pressure hose down. Salt-water high-pressure (60-80 bar) starting from the deckhead moving down. All coatings + ladders + bilge wells hit. ~6 hours per hold.
Fresh-water rinse. Fresh water rinse to remove salt residue that could crystalise + affect next cargo. Sea-water washdown alone is not sufficient for grain-clean. Bilge suctions cleaned + tested. ~4 hours per hold.
Dry + touch-up. Ventilate hold + ensure fully dry (moisture ≤ next-cargo tolerance). Touch-up any paint damage + rust spots to prevent further contamination. ~8 hours per hold. Ventilator screens verified clean.
Pre-inspection walk. Chief Officer walks every hold with own checklist. Bilge wells + suctions + ladder rungs + tank-top corners + hatch coamings + deckhead lights all verified. Documented + photographed.
Joint pre-load inspection. Chief Officer with NCB or nominated surveyor. Both agree on pass/fail per hold. Master tenders NOR ONLY when all holds pass.

Hostile cargo transitions

Coal → grain. Fine coal dust adheres to hold structures. Rust risk from coal moisture. Requires extended hose + rinse + touch-up cycles. Typical 3-5 days for Panamax to reach grain-clean from coal.
Cement → wet cargo. Cement residue sets on damp steel + is nearly impossible to remove without chipping. Chief Officer should refuse the fixture if cargo transition is not commercially viable + document to owner.
Petcoke → grain. Petcoke staining requires solvent-degreasing that most bulkers cannot do at sea. Plan mid-voyage cleaning stop OR extended prep at load port.
Sulphur → any cargo. Sulphur residue absorbs moisture + creates sulphuric acid. Very corrosive to steel. Immediate + thorough fresh-water rinse critical.
Concentrates (nickel, iron, zinc) → grain. Fine metallic dust adheres to coating imperfections + affects grain colour + odour. Extended cleaning + touch-up required. Grain surveyors reject at pre-load if not cleaned.

Bilge test — the routinely-failed step

Bilge testing is the single most common failure point in grain-clean inspection. Standard test: fill the bilge with fresh water; sound it; drain via bilge suction; sound again. Any oil sheen, sludge, or residual water = fail. If bilge suction is blocked, the entire hold fails. Chief Officer should test every bilge before the surveyor arrives + arrange emergency dredging/rodding if needed. On a Panamax with 7 holds + 2 bilge wells per hold, this is 14 bilge tests per pre-load inspection cycle.

NOR + laytime consequences

Valid NOR requires holds ready. Under most charter parties, NOR can only be tendered when the vessel is at the loading port, ready + in all respects to load. Fail one hold = NOR invalid.
Off-hire until re-inspection. Failed pre-load = ship off-hire (time-charter) or laytime not counting (voyage charter) until re-inspection passes. On $25k/day, 24 hours is $25k.
Re-inspection fee. Surveyor typically charges $500-2000 per re-inspection. Owner + charterer allocate per charter party clause.
Master + Chief Officer discretion. If a hold is borderline, do NOT tender NOR + hope the surveyor passes. Take the extra 4 hours to bring the hold up + submit a clean NOR. Once NOR is tendered + rejected, the laytime clock stops + the ship is exposed.

Frequently asked

What are the four standard hold-cleanliness grades?

Load-on-top / Cargo-clean (lowest): no residue that will damage the next cargo. Normal-clean: swept clean of previous cargo, hosed down, dry. Shovel-clean: as normal + no visible bilge or paint damage. Grain-clean (highest): swept + washed + rinsed with fresh water + fully dry + no rust flakes + all bilge suctions clean + hatch coamings + bulkheads free of residue. Additional grades (e.g. hospital-clean for foods) impose stricter tests. NCB (US) + BIMCO panel surveyors set the market standard.

How long does grain-clean preparation take on a Panamax bulker?

Typical Panamax (7 holds) grain-clean after a coal cargo: 3-5 days of continuous work with 8-crew hold-cleaning team. Includes: hold sweep (~4 hours per hold), high-pressure hose down (~6 hours per hold), fresh-water rinse + drain (~4 hours per hold), dry + touch-up of paint damage (~8 hours per hold), inspection (~2 hours per hold). Weather + steaming schedule + water availability all affect the actual time. Add 1-2 days after cement or petcoke.

What is the laytime consequence of failing a hold inspection?

If NCB or a nominated surveyor rejects any hold at pre-loading inspection, the Notice of Readiness (NOR) is invalid + the ship becomes off-hire (or laytime does not commence) until re-inspection passes. On a Panamax at $25k/day, 24 hours off-hire is a real cost. Chief Officer + Master should ALWAYS request a joint pre-load inspection with the surveyor + reach the pass BEFORE tendering NOR — do not let the receiver reject after NOR is tendered.

What is the worst cargo transition sequence?

Coal to grain is a well-known bad transition (fine coal dust adhering to hold structures + rust). Cement to any wet or foodstuff is worse (cement residue sets on damp steel + is nearly impossible to remove without chipping). Petcoke to grain is one of the hardest — petcoke staining requires solvent-degreasing that most bulkers cannot do at sea. If a bad transition is unavoidable, plan a mid-voyage cleaning stop or accept an extended prep time at the load port.

What causes most hold-inspection failures?

Rust flakes from the deckhead (previous cargo dislodged them + they landed on the hold-top). Paint damage from stevedore grabs (steel visible + rust risk). Cargo residue in bilge wells + under floors. Standing water anywhere. Ventilator screens obstructed. Bulkhead ladders + rungs still with previous cargo residue. Chief Officer's pre-inspection walk should catch all of these before the surveyor arrives.