Mechanical MTO
Template (Excel)

A mechanical material take-off (MTO) is the consolidated list of every mechanical bulk item to be procured for a project: pipe runs, fittings (elbows, tees, reducers), flanges, gaskets, bolting, valves, and piping specials. It is generated per piping class from the isometric drawings and consolidated to one procurement register. For each component it records line number, piping class, component description, nominal size, schedule, material grade, end connection, pressure rating, quantity, unit of measure, weight, item code, material requisition (MR), and applicable standard (ASME B16.5 for flanges, B16.9 for fittings, B16.11 for forged fittings, B16.20 for metallic gaskets).

Required columns: MTO reference and revision, project and unit, source isometric number and sheet revision, P&ID reference, line number, piping class, component type and description, nominal size in NPS and DN, schedule or wall thickness, material grade per ASTM or IS, end connection (BW / SW / SCRD / FLG), pressure rating per ASME B16.5 class, quantity, unit of measure, estimated weight, tag / item code per the EPC catalogue, sub-order or material requisition reference, applicable standard, heat tracing requirement, NDE class per ASME B31.3, hold / procurement status. See the MTO standard reference.

Pathnovo, an engineering document intelligence platform, extracts the mechanical MTO directly from isometric drawings using OCR and intelligent line-take-off. Each isometric is parsed for component bill of material lines, line number, piping class, and quantities. Output is consolidated across the project, deduplicated, cross-checked against the piping class specification for compliance, and exported in the EPC procurement format. Typical accuracy is 95 to 98 percent on clean issued-for-construction (IFC) isometrics, with a human review pass closing the remaining items. See the piping MTO extraction workflow.

In strict EPC terminology, the piping MTO covers pipe, fittings, flanges, gaskets, and bolting (the bulk piping commodities). The mechanical MTO is the broader register that includes the piping MTO plus valves, in-line instruments (when grouped with mechanical scope), structural supports, and piping specials (orifice plates, restriction orifices, sight glasses, expansion joints). Some EPC contractors use the terms interchangeably. The template provides a Component Type column that supports both narrow and broad interpretation. See the piping MTO template for the narrower commodity-only register.

The mechanical MTO is the source for procurement bulk material requisitions (MRs). The MTO is sorted by piping class and by material grade, then split into separate MRs per supplier package (e.g., one MR for ASTM A106 Gr B carbon steel pipe, one MR for ASTM A182 F316L stainless steel fittings, one MR for ASME B16.5 class 150 RF flanges). The MTO Sub-Order Number / MR column captures the link back to the MR. See the material requisition template for the procurement-side document.

MTO reconciliation compares the issued MTO to the as-purchased quantities and the as-installed quantities. Variance per line item is tracked: over-ordered material goes to surplus, under-ordered triggers a fast-track addendum MR. Reconciliation runs at three milestones: at IFC issue (vs FEED MTO), at construction completion (vs as-purchased), and at mechanical completion (vs as-installed). See the MTO reconciliation template for the reconciliation register that joins MTO, purchase orders, and field receipts.

On a brownfield revamp, every MTO row is tagged with a Scope column: 'existing-preserved', 'modified', 'new-installed', or 'demolish'. Procurement scope fires only from 'modified' and 'new-installed' rows. Existing-preserved rows are kept for visibility so site teams can plan tie-in shutdowns and material handling routes. Particularly important on Indian PSU and GCC refinery revamps where shutdown windows are tight and incorrect MTO scope can extend the turnaround. The as-built reconciliation template closes the loop after walkdown.