Short Overview

This guide provides comprehensive procedures for cleaning cargo tanks on chemical and petroleum tankers. It includes:

• A tank cleaning cross table covering approximately 170,000 previous-to-next cargo combinations
• A concise cargo overview with physical properties
• Acceptance information for FOSFA, NIOP, and EU standards

Recent updates in this edition:

• Cleaning procedures aligned with the latest HM50 guidelines from the Energy Institute
• Additional products to reflect current industry needs
• More detailed cleaner descriptions in the information section

Detailed Overview 

Dr. Verwey's Tank Cleaning Guide offers cleaning proposals for commonly transported bulk liquid cargoes. It covers:

• Annex II noxious cargoes and Annex I oil cargoes as regulated by the MARPOL convention
• Cleaning procedures for Annex II cargoes, which often present challenges due to differing chemical properties and high purity requirements of subsequent loads
• Clean and Dirty Petroleum Products (CPP and DPP), including special cases like aircraft fuel and low-sulphur content fuels
• Guidance for transitioning from Black cargoes to clean cargoes (DPP to CPP)

This edition includes important updates:

• Revised cleaning procedures in line with the latest HM50 guidelines from the Energy Institute
• Expanded product coverage to address evolving industry requirements
• Enhanced cleaner descriptions providing more detailed information

The guide provides reliable, practical recommendations for a wide range of cleaning tasks, helping ensure compliance with regulations and maintaining cargo integrity.

It serves as a valuable resource for maritime professionals dealing with tank cleaning operations.

Content

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

Details

IMPA Code: 370689 (37 06 89)