The vocabulary every engineering document workflow runs on.
16 terms. One document dependency.
EPC and FEED define how projects are contracted and engineered. HAZOP, PHA, MOC, and PSI define how process safety is governed. MTO, BOM, pipe specs, P&IDs, isometrics, line lists, from-to lists, PFDs, LDAR, and turnaround define the operational record. Every one of them ultimately reads from, or writes to, the engineering documents Armeta contextualizes.
Engineering, Procurement, and Construction
The contract model under which a single contractor delivers a completed, operating facility to the owner — dominant across industrial capital projects.
Read the definitionFront-End Engineering Design
The engineering phase between conceptual design and detailed engineering — where project cost, schedule, and scope are locked in for the EPC contract.
Read the definitionHazard and Operability Study
The structured PHA methodology that uses guide words to systematically identify hazards at every node of a process. The dominant PHA method for complex continuous processes.
Read the definitionLeak Detection and Repair
The EPA regulatory program under which facilities handling VOC and HAP streams systematically monitor equipment for fugitive emissions and repair detected leaks within specified timeframes.
Read the definitionManagement of Change
The OSHA PSM requirement under 29 CFR 1910.119(l) to formally manage every change to a covered process — and one of the most frequently cited PSM elements in enforcement.
Read the definitionMaterial Take-Off
The structured inventory of equipment, piping, and components extracted from engineering drawings — and one of the most consequential numbers on any industrial project.
Read the definitionPiping and Instrumentation Diagram
The master engineering drawing for every process system — equipment, piping, valves, instruments, and every interconnection that defines how the facility is built, operated, and maintained.
Read the definitionProcess Hazard Analysis
The systematic evaluation of hazards OSHA PSM requires under 29 CFR 1910.119(e). Must be revalidated at least every five years; HAZOP is the most common methodology.
Read the definitionProcess Safety Information
The documentation package OSHA PSM requires on every covered process — the factual foundation on which PHA, MOC, Mechanical Integrity, and Pre-Startup Safety Review all depend.
Read the definitionTurnaround
The planned, scheduled shutdown during which major equipment is opened, inspected, maintained, and replaced — the most consequential operational event outside of a major incident.
Read the definitionPiping Isometric Drawing
The 3D-representation drawing used to fabricate, install, and inspect individual pipe spools — the document that governs piping material take-off and shop fabrication.
Read the definitionProcess Flow Diagram
The high-level engineering drawing that shows major equipment, principal process streams, and operating conditions — the basis on which P&IDs and detailed engineering are developed.
Read the definitionLine List
The tabular master record of every piping line in a process unit — line number, size, material spec, insulation, operating and design conditions, and from-to connectivity. The structured complement to the P&ID and isometric.
Read the definitionBill of Materials
The structured, itemized list of every component required to fabricate and install a piping spool or system — the atomic unit from which the aggregate piping MTO is built.
Read the definitionPipe Specification
The engineering document defining approved materials, components, ratings, and construction requirements for every piping line in a given service and pressure-temperature range. Encoded in every line number.
Read the definitionFrom-To List
The tabular record of where every piping line begins and ends — the connectivity backbone that ties P&IDs, isometrics, and line lists into a single engineering knowledge graph.
Read the definitionThese definitions are written for engineers, project managers, and operations teams who already work with industrial drawings — not as introductions, but as crisp references that connect each term to the workflows it governs and the regulatory frameworks it sits inside.
Start with ten of your own documents.
Vocabulary defines the conversation. The fastest way to see what each of these terms looks like when your engineering documents — drawings and data tables alike — are structured, current, and document-traceable is to run Armeta on your actual archive.