Chemical Tanker - Prewash Requirement

Check whether prewash is required per MARPOL Annex II Reg. 13 - mandatory for Cat X and high-viscosity / solidifying cargoes.

Chem tankerMARPOL IIPrewash

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{Prewash} = f(\text{cat}, \mu, T_{melt})

Symbol	Meaning	Unit
$cat$	Category X / Y / Z
$\mu$	Viscosity @ 20 °C	cP

Source: MARPOL Annex II Reg. 13

Check whether prewash is required per MARPOL Annex II Reg.