Labor Man Hours in Ship Fabrication There are several methods of working out the man-hours (MHR) required for all the above operations. One method is to use the weight of materials, but most shipyard estimating departments have what is known as “norms” to achieve this very important component of estimating the fabrication of ships. Read […]
Main Engine Commisioning in Ship This includes the following main components: HVAC, piping and pumps, electrical and mechanical equipment, along with main and auxiliary engines. This can be carried out by the shipyard personnel, but it is quite specialized. At the offshore construction yard, we normally brought the equipment and systems up to a pre-commissioning […]
Guideline for Electrical Plant on Board With all types of electrical equipment cleanliness is essential for good operation. Electrical connections must be sound and any signs of sparking should be investigated. Parts subject to wear must be examined and replaced when necessary. The danger from a.c. equipment in terms of electric shocks is far greater […]
Piping Fabrication and Installation The piping fabrication isometrics are taken from the design drawing and fabricated to these. The estimate is taken from the drawings in order to ascertain the lengths of pipe, number gaskets and bolts along with the number of fittings and welds. Materials for ships piping are normally cuni-copper/nickel, stainless, and carbon steel, so […]
Engine Room for Ship New Building dan Repair The manufacturers of a modern ship’s main diesel engines such as Wartsila and MAN-B&W have licensed various shipyards around the world to build these engines and install them in their ships hulls. The costs will be pretty well standardized for the building and installation of the engines along with […]
Hull for Ship New Building dan Repair This requires a Material Take Off (MTO) for all the materials used in the hull construction. The estimators are each allocated their own section of the hull, usually by frame numbers, to produce this MTO and include everything from the main plates, longitudinal main girders, and bulkheads right […]
Estimating Costs and Preparing The Bid for a New Building in Ship I spent some time in the estimating departments of several Offshore Construction Companies, and although my remit was estimating piping fabrication and mechanical equipment installation and commissioning, I also did a little hull fabrication using welded plates. Repairs are estimated on their description […]
Operation of Anchors Using a Capstan or Windlass Anchor chains are connected to a windlass that can either be of vertical or horizontal design. A vertical windlass is known as a capstan, and we shall describe the operation of the anchor and its components using a capstan. The capstan has a drive wheel called a […]
Anchor Classification There are Certification Authorities such as Lloyds, ABS, and DNV who class and certify anchors for use in naval and commercial ships. There are two classifications used; HHP (High Holding Power) and SHHP (Super High Holding Power) and these are noted on the relevant certification. There are also two basic categories : 1. Temporary […]