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Piping Works Estimation

The document defines common piping terminology used to quantify piping work, including: - Inch-Meter (IM) which refers to the length of pipe in inches multiplied by meters installed. - Inch-Dia (ID) which refers to the diameter of pipe in inches multiplied by the number of joints. It also provides examples of how ManHours (MH), ManDays (MD), and ManMonths (MM) are used to quantify worker hours. Standard productivity rates for welders are provided, such as 50-60 ID per day for shop welding, and 25-30 ID per day for field erection welding.

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10K views3 pages

Piping Works Estimation

The document defines common piping terminology used to quantify piping work, including: - Inch-Meter (IM) which refers to the length of pipe in inches multiplied by meters installed. - Inch-Dia (ID) which refers to the diameter of pipe in inches multiplied by the number of joints. It also provides examples of how ManHours (MH), ManDays (MD), and ManMonths (MM) are used to quantify worker hours. Standard productivity rates for welders are provided, such as 50-60 ID per day for shop welding, and 25-30 ID per day for field erection welding.

Uploaded by

akg20041
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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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 )
Painting (Primer, Intermediate, Final)
Hydro TestingChemical 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

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