Naming Tie-in Activity in Primavera for Oil and Gas Project

Most time consumed activity in an Oil and Gas project is the Piping. Just imagine on the quantity of welds are involved and how much time each weld takes,  Non Destructive Examination (NDT), heat treatment when applicable, supports, painting, leak test, insulation, hydro-test.

Let’s look at all the activities coming into pipe works:

• Piping comes in small individual items: straight lengths, 2,6 or 12 meter long, elbows or flanges. They have to be welded together at the job Site.

• Piping is prefabricated to some extent to reduce construction time. Generally welds done in the workshop (shop welds) indeed take half the time as welds done in-situ (field welds). However only 2/3 of the welds can typically be done in the workshop.

• The time required to do a weld, even when done at the workshop, is already long enough: a full day for one welder for one weld on a 24” pipe. This offer underestimated by the Project Manager or the planner.

• Once the welding is completed, the piping pre-fabricated parts, called “spools” will be sand blasted, coated with a primer, brought to the erection location, erected and fitted-up.

• Field welds will then be carried out, followed by Non-destructive examinations and post weld heat treatment, if any.

• Supports will then have to be installed. The line will be inspected, for compliance to the drawings, and pressure tested. It is then flushed, provided a final coating, as well as tracing and insulation, if any.

It is important to name the piping Fabrication and Tie-in activities in order to have a clear visibility and understanding among the schedule audience. It's already many activities, let's not make it complicated by not giving it a proper name for clear identification and dependency analysis.


An activity need to be in details and descriptive enough. For an example for a piping activity under construction you might think of including location, pipe size, type of activity or even weld type.

Method 1 naming in Primavera

 For example: " Tie-in TP3901 A/B Golden tie-in (2 Tie-in 2")"
 Tie in point     = TP3901
 Type of tie-in  = Golden Tie-in
 Size of tie-in   = 2"

 For example: " Tie-in TP1501 Tubing tie-in (6mm)"
 Tie in point     = TP1501
 Type of tie-in  = Tubing
 Size of tie-in   = 6mm

 For example: " Mechanical Pre-Commissioning for System 100-11-118 Hot wax"

 This is for Pre-Commissioning activities derived from test package.

Method 2

Type of Tie in	Tie-in no	Qty of Tie in	Tie-in size	Material	System
Golden weld Tie-in	TP3901 A/B	(2 Tie-in,	4"	CS	Forced Circulation)
Hot work Tie-in	TP3920A/B	(2 Tie-in,	3"	CS	Steam )

And below is how we can name the Piping

For example : "Golden weld Tie-in TP3901 A/B (2 Tie-in, 4" CS Forced Circulation)"
                         and
                         " Hot work Tie-in TP3920A/B (2 Tie-in,  3" CS Steam ) "


It will be better to assume that those who will read your schedule will not be able to use activity code, group or sorting. Hence make sure each activity can be understand without any coding headers.

 Always assume that your reader will not be using your code grouping & sorting when reading yours schedule. Make sure each activity can stand on its own without any coding headers