PIPING WORKS Inch-Mtr (IM) & Inch-Dia (ID) Inch-Mtr – When a Pipe of 1 Inch Dia having a length of 1Mtr is installed, it is termed as 1 Inch-Mtr.(Ex. 6 Inch Pipe, Length 5 Mtr = 6 x 5 = 30 IM) Inch-Dia – When a Pipe of 1 Inch Dia Size is welded having 1 joint, it is termed as 1 Inch-Dia.(Ex. 10 Inch Pipe, 4 Joints = 10 x 4 = 40 ID)
ManHour, ManDay & ManMonth ManHour – When 1 Worker works for 1 Hour, it is said 1 MH of work.(Ex. 2 Workers worked 8 Hrs = 2 x 8 = 16 MH) ManDay – When 1 Worker works for 1 Day, it is said 1 MD of work (Ex. 3 Workers worked 7 Days = 3 x 7 = 21 MD) ManMonth – When 1 Worker works for 1 Mth, it is said 1 MM of work (Ex. 8 Workers worked for 5 Mths = 8 x 5 = 40 MM)
Piping Welding Productivity Normal Figures as per the Average working of any Company, certain Norms are as below – a) Shop Floor – 50 - 60 ID / Day / Welder (Marking, Cutting, Grinding, Tacking etc..) b) Erection at Site – 25 - 30 ID / Day / Welder (Laying, Fit-up, Welding, Testing etc..)
Related Piping Works •Pipe Supports Fabrication & Erection •Mitres Fabrication (Tee, Reducer, Elbow ..) •Insulation (Hot & Cold) •Sand Blasting (SA 2 ½) •Painting (Primer, Intermediate, Final) •Hydro Testing•Chemical Cleaning etc..
Various NDT Requirements •Visual Inspection •Radiography (X Ray, Gamma Ray) •DP / MP Testing •Vacuum Box Testing •Ultrasonic testing (UT) etc.. Various Piping Materials •CS – API 5L, A 106 Gr B (IBR, Non IBR) •LTCS – A333 Gr 6 •AS – A335 Gr P1, P11, P22 •SS – 304, 304 L, 316, 316 L, 347 H •GI – IS 1239 •HDPE / Plastic •C.I. / Cement Pipes •Cement Lined Ratio of Inch-Mtr to Inch-Dia (Appr.) •Unit Piping – 1.5 to 2.0 •Offsite / Rack / Yard Piping – 3.5 to 4.0 •Cross-Country Piping – 10.0 to 12.0 •Under-Ground Piping – 4.0 to 6.0
IM & ID Calculations from Isometrics •Piping Material wise Grouping •Sizewize Grouping • Number of Fittings •Valves (Welded / Bolted)
Piping Gangs a) Piping Prefabrication – Pipe Fabricator, Gas Cutter, Tack Welder,Grinder, Helper b) Piping Erection – Pipe Fitter, Tack Welder, Rigger, Helper c) Piping Welding – Qualified Welder, Rigger, Helper
