HULL SURVEY – WELDING STANDARD

The welding joint’s configuration and their profile are playing a vital role in ship hull structure integrity. In this article I’d like to reveal some noted points which will be regularly observed during inspection. JOINT TOLERANCES AND REMEDIAL ACTIONS: 1-Butt joint: 2-Fillet joint 3-Lap joint 4-Special note: Fillet leg size for main longitudinal  The fillet weld is to be fully penetrated, otherwise fillet size is to be equivalent to the sectional area of the longitudinal members. General fillet size F1,F2 Frame of bulk carrier Bilge Keel & Pillar End Sheer strake and deck   Welding at high stress area For … Continue reading HULL SURVEY – WELDING STANDARD

HULL SURVEY – GOOD BROUGHT IN

In the most rule requirements,  the presence of the surveyor is required at times when materials or parts manufactured at places other than the shipyard are being installed aboard the ship concerned. The general conceptual flow of the acceptance inspection process is shown as below: Inspection Procedures Presentation of list Before the start of construction of the ship, a request should be made to the shipyard to submit a list of hull assembly units, equipment and materials which are brought-in or manufactured by a sub-contractor and intended to be used in the ship. These must be subjected to an acceptance … Continue reading HULL SURVEY – GOOD BROUGHT IN

HULL SURVEY – BUILDING PROCEDURE

There are two main types of building procedures. One is the frame erection system which was prevalent before 1950 and the other is the block assembling system adopted by almost all shipyards today. In this guidance, the building procedure employed is assumed to be the block assembling system. Frame erecting system This is an old practice adopted for wooden ships in many years ago and continuously adopted for iron and steel ships of riveted construction in the 19th Century. Even now, some small shipyards continue to use this method. Block assembling system During the World War II, the construction of … Continue reading HULL SURVEY – BUILDING PROCEDURE

HULL SURVEY – GENERAL

The purpose of this article series are guidance describing the general instructions for classification surveys during construction relating to hull construction and does not include those survey items concerning SOLAS Convention matters such as life saving, fire-fighting, etc. In general of view, i’m giving you the first glance for scopes of a surveyor: Responsibility for Quality Assurance “ The workmanship is to be of the best quality. During construction, the builder is to supervise and inspect in detail every job performed in shed (workshop) and yard (field) as well. ” This means that the first responsibility for quality assurance of … Continue reading HULL SURVEY – GENERAL