CHAPTERS

• I. PIPING ABOVE GROUND
• II. PIPELINES
• III. STEEL STRUCTURES
• IV. PROCESS EQUIPMENT
• V. STORAGE TANKS CYLINDRICAL AND SPHEROIDAL
• VI. WELDING AND FLAME CUTTING
• VII. CORROSION PROTECTION
• VIII. THERMAL INSULATION
• IX. ESTIMATES
• X. PIPING ABOVE GROUND ESTIMATE POINTS FOR BUILD-IN ITEMS
• XI. WEIGHT FACTORS
• XII. TECHNICAL CALCULATION MANNER OF DATAS COMPILING
• XIII. MAN HOURS FOR OVERHAULS IN PETROCHEMICAL PLANTS
• XIV. FACTORS AND MAN HOURS FOR PIPING AND STEEL STRUCTURE WORKS IN CALL FOR TENDERS OF "TECHNIP" COMPANY
• XV. APPENDIX

TECHNICAL CALCULATION AND ESTIMATOR'S MAN-HOUR MANUAL

by: Marko Bulic

pipelines

• 01. PIPE TRANSPORT
• 02. PIPE STRINGING
• 03. BENDING OF PIPES
• 04. PIPE JOINTING
• 05. WELDING
• 06. WRAPPING
• 07. LAYING IN TRENCH
• 08. SPECIAL POINTS
• 08.1 BORING UNDER ROADS AND RAILROADS
• 08.2 BREAK OUT OF ROADS
• 08.3 CONNECTING PIPELINE SECTIONS
• 08.4 CROSSING WATERCOURSES
• 08.5 INSTALATION OF CLEANING STATIONS
• 08.6 PUTTING UP PIPELINE MARKERS
• 08.7 OTHER SPECIAL POINTS
• 09. PRESSURE TESTS
• 10. PRELIMINARY AND FINISHING WORKS

To make an estimate for laying a pipeline is a very “sensitive” operation, particularly for estimators lacking experience in the laying and installation of such pipelines. World recognized companies specializing in this kind of work have empirical rates based on diameter and length, and on “inch-meter” respectively. A widely recognized manual for that purpose is John S. Page's Cost Estimating Manual for Pipelines and Marine Structures. The impact of climate, ground and the state is quantified empirically. Since our company does not specialize only in pipelines, we developed rates and elements for calculation of the time needed. However, these rates cannot substitute an estimator. They can assist estimators in making their estimates. In principle, call for tenders do not provide all the elements needed to determine precisely the time needed for erection/installation/laying. Therefore, there are many variables to be taken into account and evaluated by the estimator in order to foresee in detail the conditions under which the works may be executed. The estimator has to make an accurate estimate of the rates, and when and which rates to apply. Similarly, he can change them depending on the case.