3583. Report Format For Weight Control Of Offshore Structures


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Stein Bjòrhovde: 3583. Report Format For Weight Control Of Offshore Structures. 2012.



The purpose of this paper is to suggest standard layouts for printouts to be included in the weight report for engineering and construction of offshore structures. The proposals are based on a systematic review of weight reports for existing oil platforms built for the North Sea and Gulf of Mexico during the last 10 year. The content of these weight reports are systemized according to the ISO standard for weight control, as well as the Statoil requirement for weight control.
Requirements for weight control of offshore structures are described in the ISO standard 19901-5 ‘Petroleum and natural gas industries – Specific requirements for offshore structures – Part 5: Weight control during engineering and construction’. This document includes definitions, weight control classes, weight- and load budgets, weight reporting, requirements for suppliers, requirements for weighing in addition to various appendixes. In this paper we will focus on chapter 6.3 ‘Requirements to the weight report’. The content of existing weight reports are systemized and mapped to the defined chapters (printouts/tables) that are required according to the ISO standard.
The Norwegian energy company Statoil has a technical requirement for weight control titled ‘TR2352 Weight control requirements for topside and substructures’. This document specifies among others which data fields the weight database should include as a minimum. One of the results of this paper is an overview of which data fields are included in the various weight report chapters required by the ISO standard.
This paper can serve as a specification of the data fields and printouts that should be included in a weight control system for offshore structures to fulfill the requirements of the ISO-19901-5. The layouts of the printouts are in focus. In this paper it is also discussed whether it’s realistic to design a weight control system that automatically or semi-automatically produces the weight reports.
Stein Bjòrhovde is one of the founders and head of development of BAS Engineering. Mr. Bjòrhovde has a Master of Science Degree in Ship Design, and has been developing the weight engineering software ShipWeight since 1993. He has also been involved in development of other weight control software, in addition to being a consultant doing weight estimation and monitoring in the offshore industry. He has more than 15 years’ experience in weight estimation of new ship designs for several Norwegian and international ship designers and yards.


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