LOD 400
LOD 400 pipe models and fabrication drawings
LOD 400 is the level a piping model has to reach before a shop can build from it. Dorseth Pipe Detailing delivers its models and drawings at that level.
What LOD means
LOD stands for Level of Development. It says how complete a model element is and how far it can be relied on. The scale comes from the BIMForum LOD Specification, which BIM execution plans and contracts across the US refer to.
- LOD 200Approximate size and location. A placeholder: a pipe about here, about this big.
- LOD 300The specified size, shape and location. Enough to coordinate the design.
- LOD 350Adds how the element connects to what is around it: other trades, supports, equipment.
- LOD 400Adds what it takes to fabricate and install it: the exact parts, spool breaks, welds and cut lengths. The shop builds from it.
- LOD 500A field-verified record of what was actually installed.
What is in the model
- Real partsEvery pipe, fitting, flange, valve and gasket at its catalog dimensions, to ASME B16 and the manufacturer’s data.
- SpoolsThe piping broken into spools, each with its own number, piece marks and numbered welds.
- Cut lengths and materialA cut length for every piece of pipe and a bill of material for every spool.
- SupportsSupports detailed for the shop to MSS SP-58, with steel cut lists, hardware and coatings.
- Vacuum-jacketed pipeThe inner line and the jacket detailed together.
- EquipmentModeled to its size and nozzle locations, enough to connect pipe to.
What you can do with it
- FabricateBuild spools straight from the sheets, with every length on the sheet.
- Order materialBuy from the bill of material instead of a separate takeoff.
- CoordinateCheck the piping against steel, duct and the other trades before anything is cut.
- Track weldsFollow every weld through fabrication and inspection by the numbers on the weld map.
- InstallSet the piping from dimensions tied to field benchmarks.
- Prefabricate moreMove work from the field into the shop, where it is faster and easier to inspect.