GB/T 36666-2018 in English

VALID

Guidelines for underwater ship cleaning

Issued on:2018-09-17
Implemented on:2019-04-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $310.00
$301.00

Standard No:	GB/T 36666-2018
Document status:	VALID
Title in English:	Guidelines for underwater ship cleaning
Title in Chinese:	船舶水下清洗指南
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2018-09-17
Implemented on:	2019-04-01
ICS Classification:	47.020.99-Other standards related to shipbuilding and marine structures
Chinese Classification:	U04-Basic standards and general methods
Professional Classification:	GB-National Standard
Related Keywords:	underwater ship cleaning companies underwater cleaning underwater ship hainan green navigation underwater cleaning technology co. cleaning process
Related Topics:	Water cluster tank cleaning method GB/T 36666-2018 Underwater Detection Guide GB/t+36666 cleaning water corner GBT36666 GB/T 36666-2018 clean water Clean water definition Ship fresh water quality testing Clean sewer testing Water heating kettle cleaning method

《GB/T 36666-2018船舶水下清洗指南》由TC12（全国海洋船标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Professional interpretation of the National Standard of the People's Republic of China GB/T 36666—2018 Guide to Underwater Cleaning of Ships

1. Background and significance of standard formulation

With the rapid development of global marine transportation, ships will inevitably be polluted by marine organisms when sailing in the water. This pollution will not only increase the resistance of the ship and reduce the navigation efficiency, but also lead to increased fuel consumption and may even affect the safety of the ship.

GB/T 36666—2018 "Guide to Underwater Cleaning of Ships" is a standard formulated to regulate and guide the underwater cleaning of ships. The standard was proposed and managed by the National Technical Committee for Standardization of Marine Ships. The main drafting units include Hainan Green Navigation Underwater Cleaning Technology Co., Ltd., China Shipbuilding Industry Corporation 704 Research Institute, etc.

This standard applies to underwater hull inspection, cleaning and acceptance of marine vessels by underwater ship cleaning companies, and can be used to guide underwater inspection, cleaning and acceptance of equipment and facilities such as oil drilling platforms, bridges and docks, and nuclear power plants. By scientifically dividing pollution levels, standardizing cleaning procedures, and clarifying acceptance standards, this standard provides an important technical basis for ship maintenance.

2. Comparative analysis of standard frameworks

Standard dimensions	Specific requirements	Implementation points
Classification of hull pollution levels	Divided into three types: soft, hard and comprehensive, with a total of 10 levels (FR-0 to FR-100)	Choose cleaning methods and tools according to the degree of pollution
Classification of antifouling paint damage degree	Divided into 10 levels from PDR-10 to PDR-100	Evaluate the paint status and decide whether it needs to be replaced or repaired
Cleaning procedures and acceptance criteria	Includes inspection, plan formulation, cleaning implementation and data recording	Ensure that the surface quality after cleaning meets the requirements

3. Interpretation of the main contents of the standard

3.1 Classification and grading of hull fouling organisms

Hull fouling organisms are divided into three categories: soft, hard and complex. The grades of each type of fouling organism are as follows:

Soft fouling organisms: include sludge and seaweed, described as surface clean or light red-green pollution.
Hard fouling organisms: include barnacles, tube worms, etc., with grades ranging from FR-40 to FR-100.
composite fouling: The presence of multiple fouling organisms at the highest stage, described as a large number of hard and soft fouling organisms covering the surface.

3.2 Antifouling Degradation (PDR)

The degree of damage to antifouling paint is divided into 10 levels, from PDR-10 to PDR-100. Each level corresponds to a different description of the paint state:

PDR-10: The paint is intact.
PDR-20: The paint is missing at the edges and seams, exposing the anti-rust paint.
PDR-30: The paint is damaged on curves and planes, leaving brush marks but not deep into the underlying layer.
PDR-100: The paint completely peeled off, and pitting and scaling appeared on the steel surface.

4. Implementation suggestions and precautions

4.1 Preparation before cleaning

Before underwater cleaning, the following work needs to be completed:

Send divers to conduct a comprehensive inspection of the hull.
Record the pollution and damage of key parts of the hull.
Develop a detailed cleaning construction plan and obtain approval from the ship.

4.2 Precautions during the cleaning process

During the actual cleaning process, the following matters should be noted:

Choose appropriate cleaning tools and methods according to the pollution level.
Avoid damage to the paint on the hull surface, especially the edges and corners.
For special areas (such as the bulbous sonar cabin and the seabed door), special cleaning equipment should be used to ensure that the relevant systems are not damaged.

4.3 Acceptance and record after cleaning

After the cleaning is completed, strict acceptance and data recording are required:

Photograph and save the image data before and after cleaning.
Submit the acceptance evaluation report after hull cleaning.
Ensure that the contaminating organisms in all key parts are completely removed and meet the corresponding standard requirements.

5. Conclusion

GB/T 36666—2018 "Guidelines for Underwater Cleaning of Ships" provides comprehensive technical specifications and operational guidance for underwater cleaning of ships and related facilities. By scientifically classifying pollution levels, rationally selecting cleaning methods, and strictly implementing acceptance standards, we can effectively improve ship maintenance efficiency, reduce operating costs, and ensure navigation safety.

More samples: JGJ 94-2008 GB 50021-2001(2009) DL/T 368-2010

Sample only — not a preview of GB/T 36666-2018