Floating dry docks are often referred to as "floaters" - they are engineering structures having enough size, strong construction and displacement as well as sufficient stability to be able to lift vessels from the water using the buoyancy. The floating docks can normally be operated with list and trim to reduce block loading and reduce or, ideally, to eliminate ship stability problems when docking or undocking.
Some shipyards are equipped to transfer vessels to shore from a dock, which enables concurrent work on multiple vessels. The common construction of the docks implies a pontoon and wing walls. The pontoon is considered the major structural component of any FDD, i.e. floating dry dock, that shall be designed to provide due distribution of the concentrated blocking loads from the vessel to the docks deck and ultimately to the uniform buoyant force on the hull.
The pontoon provides the transverse strength for the dock as well as contributing to the longitudinal strength. Additionally, the pontoon must feature sufficient size to be capable of providing enough displacement to lift the ship together with the dock from the water. In short, this is must-have book for all shipyard specialists engaged in docking activities.
Here is one of the best books about the welding - an excellent guide to welding prepared by the AISC experts. The publication contains absolutely all required information about all welding processes, applicable regulations and codes, calculations as well a other important data making it a must-have one for all students and specialists of the steel construction industry.
Nowadays, welding is considered an essential tool which have totally replaced riveting and other methods of joining that used to be in place before. Today it is used everywhere for constructing the box sections and plate girders, connecting the different structural members and for many other application, including shipbuilding, providing the reliable and cost effective connections.
In fact, welding allows nearly endless combinations of plates and shapes to be connected with no need for any mechanical fastening or connection materials. Note that the connections established during the welding process are usually looking neat and satisfy the form follows function criteria. Welding allows joining steels of various thicknesses and strength levels. This all makes welding the most popular method of connecting steel.
We are hereby introducing an excellent training set made of three volumes released to describe all issues relating to both theory and practice of welding. The content of these volumes has been specifically prepared in order to support the AWS SENSE 2.0 guidelines for training.
They combine the text part basing on the theory with the laboratory manuals and other relevant supporting materials. The arrangement of the material in the books is following the modular structure of the guidelines from AWS and is intended to guide the students through the entire process of improving their welding skills.
The first book is the core volume - it introduces readers to the welding concepts - it covers five major aspects - occupational orientation, HSE matters, interpretation of drawings and symbols, thermal cutting process, and weld inspection testing and applicable codes.
The second volume is covering two popular welding processes - GMAW (standing for the gas metal arc welding) and FCAW (meaning the flux cored arc welding). The last book of the set addresses two other processes - SMAW (i.e. shielded metal arc welding) and GTAW (which is gas tungsten arc welding) processes. In short, all required information is provided.
Though there are so many books available today on welding processes, there is still huge demand for the regular updates of the engineering community with the latest advancements in joining techniques used for the similar and dissimilar materials, as well as in numerical modeling, control and sensing.
This book has been prepared by a team of welding experts to provide the students, practicing welding engineers and researches with such updates. The content is arranged in four major parts, and the first part is devoted to the laser welding, covering the physics of the process and various applications. The second part addresses the numerical modeling of the welding processes including friction stir welding, residual stresses, distortion and other aspects.
The third part deals with the sensing of the welding processes focusing on the application of high-speed imaging. Finally, the last part of the publication covers the general topics in welding, providing readers with the required information about weld bead defects, stud arc welding etc. The authors believe that the volume will be useful to a very broad audience interested in the latest achievement in the field of welding.
This book is an excellent introduction for every workshop technician and engineer, and it will also be useful to the students of engineering lacking practical experience. The text content of the publication has been supplemented by the detailed and informative illustrations an the text itself has been presented in a clear and simple language. As a result, the author has managed to provide simple introduction to a complex subject. The remarkably broad coverage of topics has made this book very popular. The book starts with the safe practices which are obviously most important in any workshop.
The main content of the book is covering various hand processes, marking out, sheet-metal operations including bending and cutting, applicable standards, gauging and measurement techniques, cutting fluids and tools, measuring tools, turning including centre-lathe elements, controls and operations, drilling equipment and techniques, milling and grinding, different methods of joining including fasteners, brazing, riveting, soldering, locking devices etc., materials, moving loads, presswork and so many other interesting and practical topics - in fact this book provides absolutely all information you have to know when getting involved in any workshop activity.
The present publication released by LR is aimed to give readers some general overview of the ship designers and ship construction yards located in Southern Asian region, including India, Singapore, Bangladesh, India, Malaysia and other countries.
Over a huge geographical area a broadest range of various important factors have eventually shaped the development of the ship construction in the region - among those factors there were practical experience, history, cultural factors, ambition, and demand - all of them affected and continue to affect the shipbuilding capabilities in the region.
While recently Japan, South Korea and China have had number of the ordered vessels decreased, some of the South Asian countries dealt with in the pages of this guide have experienced some growth in orders. Taking the increased quality, competitive pricing and their burgeoning capability into account, both international and local ship owners are increasingly seeing subject area as a very attractive new construction option for their future projects.
The capability of the shipyards is now getting at a competitive level when we are talking about the facilities, quality and timing of the leading construction yards... In short, this document will be found practically useful by the people involved in the organization of the shipbuilding projects due to the information contained covering numerous yards.
For several decades, the practical application of the high-power lasers in the industry have been significantly increasing; nowadays, lasers are considered quite well-established hi-tech industrial instrument. And one of the main industrial applications of the lasers is welding.
The technical potential of such high-brightness sources of energy as lasers to establish high-quality welding seams at high rates is really outstanding and that is the reason why so many welding applications of lasers and electron beams have been developed.
The main problem of using lasers for welding was the stringent tolerances applied to the joints as demanded by the welding processes involving electron beams and lasers. The laser beams normally heat only the welding seam itself plus some very limited area around the seam. Should the wider gap be there, it may eventually result in such defects as undercuts and underfills, while sometimes the beam partly transmits through the gap instead of welding the metal.
Thus, for years people considered it impossible to use the above mentioned techniques in the industry. Long story short, it took many years and several brilliant technological advances to enable people to use the electron beams and lasers for welding. And this video will demonstrate you how the welding is made covering the most important aspects of the process...
Here is quite rare and invaluable little guide intended for use by the people engaged with costing ship repair works. The content of the guide was specifically prepared to outline to the technical superintendents of the shipping companies the way to be followed when compiling the quotations.
The ship repair companies commonly use their own tariffs for standard works when building their quotations, and this is the information the present guide is based on. Note that the prices have been presented in man-hours in order to assist the long-term pricing. It will also be helpful to the shipyard personnel assessing the manpower requirements for the various jobs and producing the time-based plans.
The advantage of using the man-hours in this book is that the book will not be dated since there will be no necessity to encounter any increases in costs occurring over the years. Note also that the material costs have not been covered since they are usually supplied by contractors and built into the labor costs.
The book only considers the repair an shall not be used for the new construction projects due to the different nature of jobs involved. It is important to understand that the man-hours for particular job may vary under different working conditions, location, environment and other factors to be considered.