钢结构、设备、管道、管件刷油漆面积计算公式.doc

钢结构、设备、管道、管件刷油漆面积计算公式1、Method of Surface Area CalculationIn the WORK DESCRIPTION for Painting, Insulation and Fireproofing, the surface area of machinery, equipment, piping materials and others, which is the volume shall be calculated by using the following formula;(1)Calculation formula of surface area:-(a)Support MaterialA = 35.0 x TA: Surface area(m2)T: Support material weight(ton)(b)Steel Structure (Vendor Supply Structure)A = 30.0 x TA: Surface area(m2)T: Support structure weight(ton)(c)Platform/Ladder/Hand RailA = 40.0 x TA: Surface area(m2)T: Platform/Ladder weight(ton)(2)Machinery and EquipmentSurface area is calculated in accordance with the following formula.(a)Vessel and TowerA= 3.14 x D(L + D/4 x 1.2 x 2)A : Surface area(m2)D : Outside diameter(m)L : T.T length(m)(b)Heat ExchangerA= A1A1= 3.14 x D1 x L1A2= 3.14 x D2 x L2A : Surface area(m2)A1: Surface area of shell side(m2)A1: Surface area of tube site(m2)D1: Outside diameter of shell side(m)D2: Outside diameter of tube side(m)L1: Length of shell(m)L2: Length of channel(m)(c)Rotating Machine and Other EquipmentMeasurement shall be made on the basis of outside surface area of machinery and equipment in accordance with drawing and technical documents.(3)Piping MaterialsSurface are is calculated in accordance with the following formula.(a)PipeA = 3.14 x D x LA: Surface area(m2)D: Outside diameter of pipe(m)L: Length of pipe(m)(b)FlangeA = 0.4 x 3.14 x D x NA: Surface area(m2)D: Outside diameter of pipe(m)N: Number of flange(c)ElbowA = 3.14 x D2 x 1.5 x 2 x 3.14/B x NA: Surface area(m2)D: Outside diameter of elbow(m)N: Number of elbowB: For 90 elbow B = 4For 45 elbow B = 8(d)TeeA = 3.14 x D x LA: Surface area(m2)D: Outside diameter of tee(m)(large side)L: Length of pipe(m)(e)ReducerA = 3.14 x D x LA: Surface area(m2)D: Outside diameter of reducer(m)(large side)L: Length of reducer(m)(f)Valve & FlangeA = 3.14 x D2 x 2.5 x 1.1 x NA: Outside surface area(m2)D: Outside diameter of flange(m)N: Number of valve(g)Trace Line(This method of calculation is only applied to insulation.)Diameter of trace pipe shall be added to the diameter of line pipe, flange, elbow, tee and reducer which is traced.A = 3.14 x (D1 + D2) x LA : Outsi