MasterFormat Division 43: Process Gas and Liquid Handling, Purification, and Storage Equipment

MasterFormat Division 43 organizes the specification sections, cost codes, and work results for process gas and liquid handling, purification, and storage equipment across the construction industry. As part of CSI's consensus-based classification system, Division 43 provides the authoritative structure that specifiers, estimators, contractors, and software platforms use to organize process gas and liquid handling, purification, and storage equipment work.

Division 43 covers process gas and liquid equipment—pumps, compressors, tanks, filters, and purification systems for industrial process facilities.

This division includes gas handling equipment, liquid handling equipment, gas and liquid purification equipment, and gas and liquid storage.

Division 43 contains multiple levels of sections and subsections that organize this scope into a precise, consensus-based hierarchy. These sections provide the numbering backbone for project manuals, bid packages, cost databases, and BIM models. When teams reference Division 43 consistently, every document from concept estimate to closeout speaks the same language.

Licensed through The Construction Standard, CSI Dynamic Standards includes the authoritative, always-current section numbers and titles for Division 43—searchable, cross-referenced, and edition-aware.

• Process engineers designing fluid handling systems
• Water and wastewater treatment engineers
• Chemical plant designers
• Oil and gas facility engineers

Whether you write specifications, estimate costs, coordinate BIM models, or build software that references process gas and liquid handling, purification, and storage equipment, Division 43 numbers and titles are the shared vocabulary your work depends on.

How Division 43 Connects to Other Standards

UniFormat

Division 43 equipment serves specialized industrial building functions alongside UniFormat D (Services) and E (Equipment & Furnishings).

OmniClass

OmniClass Table 23 (Products) classifies pumps, compressors, tanks, and purification equipment for process facilities.

These cross-references are maintained by CSI through governed crosswalks—not assembled ad hoc by individual project teams. Through The Construction Standard, licensed access to CSI Dynamic Standards gives teams these relationships so they can navigate between specifications, elements, and lifecycle categories without manual remapping.

Why Edition Awareness Matters

MasterFormat evolves through consensus-based updates. Projects that span multiple years may reference different editions. Division 43 sections may be added, renumbered, or revised between editions. Without edition awareness, teams risk referencing obsolete section numbers, creating specification conflicts, and generating RFIs that delay construction.

Licensed through The Construction Standard, CSI Dynamic Standards gives teams full edition context for Division 43—teams know which edition applies at each project milestone, what changed, and where those changes affect their work.

The Licensing Relationship

CSI—the Construction Specifications Institute—stewards Division 43 as part of MasterFormat. CSI Dynamic Standards includes MasterFormat, UniFormat, and OmniClass as a connected, edition-aware system. The Construction Standard provides licensed access to CSI Dynamic Standards:

• Always current: Section numbers and titles reflect the latest CSI-approved updates
• Edition-aware: Teams know which edition applies and what changed between releases
• Cross-referenced: Governed relationships to UniFormat and OmniClass stay maintained
• Integration-ready: Enterprise solutions carry Division 43 data into the tools you already use