REMODELING CONTRACTORS - CONSTRUCTION COMPANY-Part 8

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The contents of this publication has been prepared by Engineers of long experience in implementing Remodelings-Industrial Construction- Construction of Buildings
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#FAST ESTIMATIONS

#ESTIMATION OF MAN-HOURS FOR TASKS OF WELDING PIPING

Firstly we are going to divide in two groups the welding of piping’s
1 Welding where only we go away to control quality for Hydraulic Test
2 So Welding where we go away to control quality with Nondestructive Test ( for radiographer example ) in addition to The Hydraulic Test

For works with piping’s, it's necessary a good Engineering for making prefabricated ( At workshop) ) then this prefabricated are moving to place for its positioning, adjustment and welding at field
In general with a Standard Engineering, the quantity of welding that we can execute when we prefabricated (we accomplish more rapidly that weld that in field ) reach 70 to 90 % of the total of welding ..Achieving a minor expense of Man-Hours that way

We should tell also that welding Time is depending the material that is welding , we will refer us to the Materials carbon steel

It is also necessary understanding that welding time varies according to the Thickness of the pipe ( to bigger thickness, more setup time of bevels and more work of the Welder, he has to refill more ) and its Diameters ( to bigger diameter, bigger difficulty to move them )

We will definitively give here times Standard ( where laborers, they do not work for production or finished task )


For the first type of welding ( where quality control is only under Hydraulic Test ) and for 4-inch Standard pipe of steel .. time for inch welding ( the group is formed by one assistant, a hurdle maker and a welder ) is of 0.70 hh x pulg for welding at field and 0.40 hh x pulg for prefabricated welding .If they work 10 hours per day, each group, will produce about
42 and 75 inches day, respectively

For the second type of welding ( here quality with Test nondestructive gets under control ,besides Hydraulic Test ) and for the same diameters times happen to..Time for inch of welding at field 2hh x pulg , and 1 hh x pulg of welding in prefabricated, the production for 10 working hours is for each group of 15 and 30 inches day respectively

Notice
Times ( solo indicative ) include
Manipulation Put-Up and Welding

They do not include
Painting- isolated -supports or Clamps