Published: September 2022
Author: ChemServe
Dr Verwey’s Tank Cleaning guide contains cleaning proposals for frequently shipped bulk liquid cargoes. This comprises noxious cargoes regulated by Annex II as well as oil cargoes regulated by Annex I of the MARPOL convention. The cleaning of Annex II cargoes is often very difficult, as the subsequent cargoes usually have different chemical properties than the cargo to be cleaned and the cargo to be loaded often has extremely high purity requirements (Ultra High Purity Cargoes).
In the shipping of Clean and Dirty Petroleum Products (CPP and DPP), the cargoes differ little in terms of their chemical properties and complicated cleaning is less common than in chemical shipping. However, there are many exceptions to this rule because some cargoes in this trade also have high purity requirements. Examples include aircraft fuel or fuels with very low sulphur content. A particular difficulty arises when it is necessary to switch from Black cargoes to clean cargoes (DPP to CPP).
Verwey provides reliable recommendations for all cleaning tasks.
Table of Contents
Part 1: Introduction and Tank Cleaning Knowledge
Introduction
How to use the FROM – TO cleaning
Planning of tank cleaning
Physical properties of the cargoes
Cargo Characteristics
Required cleanliness standard of the cargo to be loaded (next cargo)
Available Equipment
Surrounding Conditions
Pipelines, Valves etc.
Tank Cleaning Recipe
Method description
Additional methods not mentioned in cleaning procedures
Cleaning additives
Coating
MARPOL
Tank Inspection and Testing
Wall Wash Procedure
Wall Wash Tests
Safety
Abbreviations
Part 2: FROM – TO cleaning and Cargo Details
FROM – TO cleaning
Cleaning Procedures
Cargo Details
