Marine Chain Cable Pocket Guide

Год выпуска: 2011

Язык: английский

Автор: Lloyd’s Register

Жанр: Справочное пособие

Издательство: Lloyd

Формат: PDF

Качество: OCR без ошибок

Количество страниц: 48

Цена : 500 рублей

Описание: The risk associated with chain failure, as well as the costs of

replacement mean that it is essential that welded chain cable is

properly manufactured, tested and certified.

Stud link chain cable is a relatively high strength steel compared

with weldable structural steel. This is particularly true for grade

U3 chain materials. In order to achieve the required strength the

carbon is increased and the correct heat treatment is therefore

critical to achieving the required properties.

The composition of the steel used to manufacture chain cable

necessitates care when welding these materials. Most stud link

chain is manufactured by an automated flash butt welding

process, and where studs are welded this is normally done

manually. It is important that both processes are properly

conducted according to Rule requirements, since the result of

poor welding is a reason for rejection of the chain cable, as some

of the examples in this guide show.

This guide has been produced to assist LR Surveyors in the survey

of marine chain and fittings according to LR Rules. The intention

is to provide guidance on the correct interpretation of the Rules,

with regard to the survey of chain during manufacture.

LR has a wealth of knowledge and experience in the survey of

chain. Therefore Surveyors are reminded that if there is any doubt

over the acceptance of chain according to Rule requirements, they

should ask for advice.

The guide does not form part of LR Rules, and where necessary,

reference should be made to the Rules. The guide is based on the

requirements incorporated into the Rules for Materials dated July

2011, but Surveyors must always make reference to the current

version of the Rules.

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