Isometric plans
(axonometry)
& bill of materials
Isometric Plans (Axonometry)
"These are indispensable documents for the plumber.
The isometry (axonometry - is the representation of a line in isometric view) comprises all the elements needed to set up the line:
The centralizer incorporates all the accessories of the installation (angle pipes, branch pipes, etc.), the materials needed (valves, filters, check valve, etc.)
and references to the general plan of the installation and/or the process flow diagram."
Bill of Materials
"We make bills of materials starting from the process flow diagrams and construction plans in order to determine the quantity of valves and accessories needed.
We calculate the quantity of accessories depending on the international standards in force and the technical specifications.
We will draw up a list to indicate how many meters of pipe are needed, the number of angle pipes needed, the number of flanges, branch pipes, etc.
We calculate the quantity of welds expressed in inch (1 inch standard) in order to make an estimation of the cost of the facility.
This estimation is based on the number of accessories, length and complexity of the construction and location."
Security &
Confidentiality
We place a high value on confidentiality and security. As a result, we provide each of our clients with their own private upload and download URLs and passwords on our local server. If you want to learn more about how we exchange documents, follow the link below:
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EXAMPLES FROM PREVIOUS projects:
What the isometric we hand over contains
It is the pipe fitter's reference document for the prefabrication and erection of a line. Whatever is not on it will be improvised.
The isometric view of the line
Complete routing, orientations, line tag and connection to the neighbouring lines.
The bill of materials
Extracted from the model, then checked against the piping class and the reference P&ID: pipe, fittings, valves, gaskets and bolting, with quantities and material specifications.
The fabrication dimensions
Spool lengths, dimensions between welds, connection dimensions to equipment and to fixed points.
The weld numbering
Numbering of shop and field welds, for inspection follow-up and traceability of the tests.
The inspection data
Piping class, design pressure and temperature, applicable testing and non-destructive examination requirements.
The formats
PDF for site, DWG and native extraction for your dossier.
The take-off is not done once
Between the first estimate and the order, the quantity changes. Our nomenclature follows that movement instead of enduring it.
A bill of quantities at each level
A take-off is produced at 30, 60 and 90 per cent of model progress. Each serves a different decision: pricing, tendering, ordering long-lead items.
The final take-off
Extracted from the model at 100 per cent. It is the one the order rests on.
The isometrics
Produced from the model, never drawn alongside it.
The bill of materials from the isometrics
Extracted line by line. It serves prefabrication, where the global take-off served procurement.
A third party's isometrics, to be checked
A separate service: reviewing isometrics we did not produce, against the project's own framework.
An isometric drawn apart from the model ends up diverging from it, and it is the fitter who discovers the gap, drawing in hand, at the foot of the rack.
We therefore extract them from the model, and we check line by line that they are consistent with the P&ID before delivery: same tag, same class, same diameter, same instrumentation. That check is time allowed for in the schedule, not a courtesy review.