The DNV GL standard for the certification of the container securing devices providing required guidance through a whole process of certification. The content of the document is covering the procedures and applicable requirements for obtaining the relevant product certificates for subject securing devices.
While the opening chapter of the Standard is pretty introductory and contains general information, the second chapter describes the certificates including how and when they are required and issued, and the certification procedure. The next chapter is devoted to the materials used and welding issues - it is addressing the support fittings and securing equipment, heat treatment and the mechanical tests.
The fourth chapter deals with the type approval of the securing devices and guides readers through the plan approval process, prototype and operational testing. The remaining chapters of the document provide information about the case-by-case approval used as an alternative to the generally used type approval, production testing of the support fittings, lashing assemblies and non-standardized securing equipment. Finally, the volume concludes with the information about the identification marking of the manufactures and tested items.
The official CCS document providing required guidance for the design and subsequent installation of the dual-fuel engine systems. The requirements and information in this paper will apply to the engines using LNG and oil fuel as a fuel. The content of the guidelines is arranged in five chapters, first of which being introductory and providing the definitions, plans and documents, and also application.
The shipboard trial is also addressed within this opening chapter. The second and third chapters deal with the engine room/compartment and gas fuel piping system, respectively, covering general and specific requirements. The fourth chapter is devoted to the dual fuel engines and addresses the arrangement, protection of the crankcase, starting air, air intakes and piston underside area, ventilation and exhaust system.
The closing fifth chapter of the document is dealing with the control, monitoring and safety systems providing general requirements as well as the M&S system functions and gas fuel supply systems. The document is primarily intended to be used by the crew members of the vessels classed by China Register but the content will be equally useful to the engine room team of any vessel equipped with such system and engaged in the operation and maintenance of subject machinery.
Another DNV GL publication providing guidance on cathodic protection - this one may be used together with the cathodic protection design related recommended practice and is devoted to the protection of submarine pipelines. Subject pipelines are normally designed using the external coating as primary corrosion control system. However, a CP, standing for the cathodic protection, is still provided serving as back-up for any deficiency that may be there in the primary coating.
These deficiencies usually include damages to the coating occurring in the course of the transportation of the pipe and its installation, mechanical damage, coating degradation etc. The detailed and thorough design of the coating systems and due control of the quality are, in turn, primary factors. The cathodic protection is normally achieved by means of galvanic anodes or impressed current from rectifier. The galvanic anodes are often referred to as sacrificial anodes and they are mainly used for the protection of submarine pipelines.
These systems are traditionally self-supporting and all anodes comprising the system are installed directly on the pipe using the bracelet type anodes that clamp around the line and electrically connect to the pipe in an individual manner. The design of the cathodic protection systems applied for protection of the submarine pipelines is carried out in two stages, namely conceptual and detailed design...
The officially released CCS guidelines for conducting the measurement and control of noise on board ships. The intent of the guidebook is to provide effective methods of noise prediction and required measures of control for the vessels plus the methods of measuring noise on board, with the aim of verification of the measurements for their compliance with the requirements applicable to particular compartments of ships or other marine structures.
These guidelines apply to the vessels with the gross tonnage exceeding 1600 engaged in international passages. The content of the guide is arranged in four major parts. The first part provides the general introduction including technical provisions and verification of compliance. The second part is devoted to the control of noise and describes the noise control procedure, noise prediction and sources of noise as well as the measures to be undertaken to attenuate noise.
The third part is dealing with the noise measurement for marine products and addresses the airborne and structureborne noise, sound reduction and the approval requirements for the organizations conducting noise measurement. Finally, the fourth part covers the noise measurement on board ships and deals with the noise exposure limits and their correct determination, tools and calibration, institutes and personnel involved, and many other important aspects to consider.
The recommended practice related to the design of the cathodic protection, prepared by DNV GL professionals. Traditionally for all DNV GL guidelines, the document opens with the general information part explaining the very basics of the cathodic protection principle, scope of this paper, its objectives and use, its structure and relation to other documents.
The second chapter lists the references, such as the ASTM, EN and ISO standards, and another DNV GL document governing the CP of submarine pipelines by galvanic anodes. Then there is a list of abbreviations, terms, symbols and definitions used in the document. The main part of the paper addresses the general considerations for the design of cathodic protection, main design parameters to consider, design procedures and associated calculations, manufacture of the anodes and their installation.
There are three appendices at the end, first of them contains informative data tables and figures to supplement main text, while the other two provide the results of the laboratory tests of the galvanic anode materials for quality control and for electrochemical performance qualification. Noting the amount of useful technical information contained in the volume and that it has been released by the authoritative entity, we highly recommend it for familiarization to all parties involved in provision of CP.
The present guidebook constitutes the Rules developed by the CCS and established the technical requirements as well as survey and testing requirements of SCR, standing for the Selective Catalytic Reduction system. Note that the content of this document shall only apply to the system using the aqueous urea as reductant. Special consideration shall be applied for approval of the systems using liquid ammonia or ammonium hydroxide as reductant.
The paper opens with the description of its application and purpose, relevant normative documentation, definitions, abbreviations and terminology. The main part of the document addresses the plans and documents, and technical requirements that are commonly applicable to such systems, covering raw materials and parts, control system, SCR chamber, supply system and various auxiliary equipment and, finally, redundancy of the SCR system.
The other chapters of the guidelines are dealing with the control and monitoring, safety protection and equipment used for this, technical requirements for the system testing, including sample selection, scaling purpose, model tools and test, type tests and other information. The last chapter is devoted to the technical file of the system and description of the parameter check method. Some additional info is provided in the appendices.
The RP, i.e. Recommended Practice, released by DNV-GL and providing required guidance for the planning of the ballasting operations, stability of the vessel and watertight integrity of the hull. The guidebook starts with the chapter providing general information including intro and description of scope and objective, structure of the document, and abbreviations/definitions used.
The main part covers the management of significant themes including design and equipment, stability and integrity, ballast and bilge systems, inspection of the subject arrangements, their repair and periodic maintenance, associated documentation, training of the personnel involved etc. Then, we move to the development of the operational guidance and its subsequent implementation on board, including the comprehensive overview of the operating guideline, pre-mobilization checks, and execution requirements plus other relevant information.
There are several appendices in the closing part of the booklet providing the supplementary information, such as the implementation matrix, AMOG development/implementation process flow and associated check sheet, examples, MOM guidelines etc.
The official guidance notes developed and released by Chinese Class Society, CCS. This document is intended to provide required guidelines to be applied for the assessment of the reliability and safety of the software used in the computer systems installed on board, including programmable e-systems. It is specifying all relevant technical requirements concerning the development and testing of the software, its authentication, production and subsequent maintenance.
In addition, the document also addresses the requirements applicable to the hardware part of the systems. The main focus has been made on the life cycle of the software development, adopting some major processes in the integral cycle. The authors of the guide adopt the V model as the development model. The documents opens with the chapter defining its scope and providing the descriptions, followed by the list of normative references, abbreviations and terms used throughout the guide. Then, the information is provided covering the categorization of the shipboard computer systems and requirements applicable to the quality system, lifecycle of the system and of the software development.
The last chapter is devoted to the test and verification of the systems. Three appendices touch the verification procedures for the inspections and tests, evaluation of the low complexity systems and technical recommendations to be considered during the design and implementation.