钢结构、设备、管道、管件刷油漆面积计算公式

第第页钢结构、设备、管道、管件刷油漆面积计算公式钢结构、设备、管道、管件刷油漆面积计算公式

1、MethodofSurfaceAreaCalculation

IntheWORKDESCRIPTIONforPainting,InsulationandFireproofing,thesurfaceareaofmachinery,equipment,pipingmaterialsandothers,whichisthevolumeshallbecalculatedbyusingthefollowingformula;

(1)Calculationformulaofsurfacearea:-

(a)SupportMaterial

A=35.0*T

A:Surfacearea(m2)

T:Supportmaterialweight(ton)

(b)SteelStructure(VendorSupplyStructure)

A=30.0*T

A:Surfacearea(m2)

T:Supportstructureweight(ton)

(c)Platform/Ladder/HandRail

A=40.0*T

A:Surfacearea(m2)

T:Platform/Ladderweight(ton)

(2)MachineryandEquipment

Surfaceareaiscalculatedinaccordancewiththefollowingformula.

(a)VesselandTower

A=3.14*D(L+D/4*1.2*2)

A:Surfacearea(m2)

D:Outsidediameter(m)

L:T.Tlength(m)

(b)HeatE*changer

A=A1

A1=3.14*D1*L1

A2=3.14*D2*L2

A:Surfacearea(m2)

A1:Surfaceareaofshellside(m2)

A1:Surfaceareaoftubesite(m2)

D1:Outsidediameterofshellside(m)

D2:Outsidediameteroftubeside(m)

L1:Lengthofshell(m)

L2:Lengthofchannel(m)

(c)RotatingMachineandOtherEquipment

Measurementshallbemadeonthebasisofoutsidesurfaceareaofmachineryandequipmentinaccordancewithdrawingandtechnicaldocuments.

(3)PipingMaterials

Surfaceareiscalculatedinaccordancewiththefollowingformula.

(a)Pipe

A=3.14*D*L

A:Surfacearea(m2)

D:Outsidediameterofpipe(m)

L:Lengthofpipe(m)

(b)Flange

A=0.4*3.14*D*N

A:Surfacearea(m2)

D:Outsidediameterofpipe(m)

N:Numberofflange

(c)Elbow

A=3.14*D2*1.5*2*3.14/B*N

A:Surfacearea(m2)

D:Outsidediameterofelbow(m)

N:Numberofelbow

B:For90elbowB=4

For45elbowB=8

(d)Tee

A=3.14*D*L

A:Surfacearea(m2)

D:Outsidediameteroftee(m)(largeside)

L:Lengthofpipe(m)

(e)Reducer

A=3.14*D*L

A:Surfacearea(m2)

D:Outsidediameterofreducer(m)(largeside)

L:Lengthofreducer(m)

(f)ValveFlange

A=3.14*D2*2.5*1.1*N

A:Outsidesurfacearea(m2)

D:Outsidediameterofflange(m)

N:Numberofvalve

(g)TraceLine

(Thismethodofcalculationisonlyappliedtoinsulation.)

Diameteroftracepipeshallbeaddedtothediameteroflinepipe,flange,elbow,teeandreducerwhichistraced.

A=3.14*(D1+D2)*L

A:Outsidesurfac