Lloyd’s Register. Marine Chain Cable Pocket Guide

Description

London: Lloyd’s Register, 2011. 49 p.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.As far as possible, the guide uses pictorial examples of imperfections in chain. It should be noted that acceptance or rejection is to be in accordance with the Rules and the images provided are only for guidance purposes.This guide is restricted to chain cable for ships, and covers stud link chain cable, short link chain cables and the more common fittings which are attached to them. The guide does not specifically relate to mooring chain cables although similar imperfections can potentially arise in them.The guide concentrates on the flash butt welding process for the manufacture of chain. The manufacture of chain by casting or forging is not covered, and neither are the types of imperfections which may arise in casting and forging processes.ContentsIntroduction How to Use This Guide Chain Types and Fittings Stud Link Chain Manufacture Bar Material Chain Link Manufacture Bending Flash Butt Welding Trimming Stud Pressing Stud Welding Heat Treatment Testing: Finished Chain Cables Proof Load Test Dimensional Inspection Five Link length Link Dimensions Break Tests Mechanical Tests Certification and Stamping of Identity Appendix – Defect Catalogue