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http://dx.doi.org/10.3744/SNAK.2016.53.5.362

A Study on Weight Estimation and Calculation of the Pipe Rack Structures for FPSO EPC Projects  

Lee, Soo-Ho (Technology Strategy Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
Ahn, Hyun-Sik (Technology Strategy Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
Kim, Han-sung (Technology Strategy Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
Heo, Yoon (Technology Strategy Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
Bae, Jae-Ryu (Technology Strategy Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
Kim, Ki-Su (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Ham, Seung-Ho (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Lee, Sung-Min (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Roh, Myung-Il (Department of Naval Architecture and Ocean Engineering, and Research Institute of Marine Systems Engineering, Seoul National University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.53, no.5, 2016 , pp. 362-370 More about this Journal
Abstract
The weight estimation and calculation of FPSO topsides is first performed at the bidding stage of projects. At this time, it is difficult to estimate and calculate accurately the weight because most of items of FPSO are not apparently defined. Especially, in the case of the pipe rack module, its portion of the total weight and the range of weight variation are large due to special features of piping and electric equipment in the module. Thus, it is very important to estimate and calculate accurately its weight in the task of the weight estimation and calculation of FPSO topsides. In this study, the past data for the weight of the pipe rack module were collected and analyzed, the WBS (Work Breakdown Structure) for the pipe rack module was constructed, and primary variables and secondary variables for developing a weight estimation and calculation model were selected. That is, after analyzing the past data, the volume was selected as the primary variable and the regression analysis was performed based on the variable. Then, several secondary variables were selected and incorporated into a weight estimation and calculation model. At this time, the weight per discipline was assumed from ratios of the total weight. Finally, the weight of the pipe rack module was estimated and calculated by using the developed model. As a result, the deviation from the model was better than that (-20 % ~ 60 %) of other studies about the weight estimation and calculation of FPSO topsides. Thus, the validity and applicability of the weight estimation and calculation of the pipe rack could be checked.
Keywords
Pipe rack; Weight estimation and calculation; Work breakdown structure; Regression analysis;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 Bolding, A., 2001. Bulk Factor Method Estimates FPSO: Topsides Weight. The Oil and Gas Journal, 99, pp.49-53.
2 Cho, Y.J., 2011. A Development of the Ship Weight Estimating Method by a Statistical Approach. Journal of the Society of Naval Architects of Korea, 48(5), pp.426-434.   DOI
3 Nicolas, A.H. & Sarah, D.PE., 2012, Cost Estimation Challenges and Uncertainties Confronting Oil and Gas Companies. Association for the Advancement of Cost Engineering, 54(3), pp.14-30.
4 Rui, R. & Walker, J., 2015. Upstream Offshore-Facility Weight-Growth Study. Oil and Gas Facilities, 4(2), pp.107-112.   DOI
5 Runar, A. & Bjorhovde, S., 2010, Early Stage Weight and Cog Estimation Using Parametric Formulas and Regression on Historical Data. Society of Allied Weight Engineers, 1, pp.287-321.
6 Seo, S.H. Roh, M.I. Ku, N.K. & Shin, H.K., 2013. A Study on the Simplified Model for the Weight Estimation of Floating Offshore Plant Using the Statistical Method. Journal of the Society of Naval Architects of Korea, 50(6), pp.373-382.   DOI
7 Seo, S.H. Roh, M.I. & Shin, H.K., 2014. A Study on the Weight Estimation Model of Floating Offshore Structures Using the Non-linear Regression Analysis. Journal of the Society of Naval Architects of Korea, 51(6), pp.530-538.   DOI
8 Um, T.S. Roh, M.I., Shin, H.K. & Ha, S., 2014. Simplified Model for the Weight Estimation of Floating Offshore Structure Using the Genetic Programming Method. Transactions of the Society of CAD/CAM Engineers, 19(1), pp.1-11.   DOI
9 Um, T.S. Roh, M.I. & Shin, H.K., 2015. A Study on Weight Estimation Model of Floating Offshore Structures Using Enhanced Genetic Programming Method. Journal of the Society of Naval Architects of Korea, 52(1), pp.1-7.   DOI