237120 — Oil and Gas Pipeline and Related Structures Construction
Description
This industry comprises establishments primarily engaged in the construction of oil and gas lines, mains, refineries, and storage tanks. The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to oil and gas pipeline and related structures construction. All structures (including buildings) that are integral parts of oil and gas networks (e.g., storage tanks, pumping stations, and refineries) are included in this industry (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Distribution line, gas and oil, construction
- Oil refinery construction
- Gas main construction
- Petrochemical plant construction
- Gathering line, gas and oil field, construction
- Natural gas pipeline construction
- Pumping station, gas and oil transmission, construction
- Storage tank, natural gas or oil, tank farm or field, construction
- Natural gas processing plant construction
Exclusions & Cross-References
- Building chemical plants (except petrochemical) and similar process or batch facilities--are classified in
- Industry 236210, Industrial Building Construction;
- Oil well rig building, repairing, and dismantling, on a contract basis--are classified in U.S. Industry 213112,
- Support Activities for Oil and Gas Operations;
- Inspecting pipelines (i.e., visual)--are classified in Industry 541990, All Other Professional, Scientific, and
- Technical Services;
- Installing and maintaining natural gas distribution lines performed by natural gas utility companies--are
- classified in Subsector 221, Utilities;
- Mining machinery and equipment repair and maintenance--are classified in Industry 811310, Commercial
- and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance; and
- Manufacturing floating oil and gas drilling and production platforms--are classified in U.S. Industry
- 336611, Ship Building and Repairing.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 1382 - Oil and Gas Field Exploration Services (via SIC1987:1382→NAICS1997:213112→2002:237120→2007:237120→2012:237120→2017:237120→2022:237120)
- SIC 1389 - Oil and Gas Field Services, NEC (via SIC1987:1389→NAICS1997:213112→2002:237120→2007:237120→2012:237120→2017:237120→2022:237120)
- SIC 1623 - Water, Sewer, Pipeline, and Communications and Power Line Construction (via SIC1987:1623→NAICS1997:23491→2002:237120→2007:237120→2012:237120→2017:237120→2022:237120)
- SIC 1629 - Heavy Construction NEC (via SIC1987:1629→NAICS1997:23493→2002:237120→2007:237120→2012:237120→2017:237120→2022:237120)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC C1NA — ARCHITECT AND ENGINEERING- CONSTRUCTION: FUEL SUPPLY FACILITIES
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 237120 valid in 2022? ▾
Yes, 237120 is a valid 6-digit 2022 NAICS national industry code representing 'Oil and Gas Pipeline and Related Structures Construction' under Sector 23 in the official classification index.
What is the SBA size standard for NAICS code 237120? ▾
The Small Business Administration (SBA) has established a small business size standard of $45,000,000 for NAICS code 237120 (Oil and Gas Pipeline and Related Structures Construction), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 237120? ▾
According to official Census Bureau concordance tables, NAICS code 237120 (Oil and Gas Pipeline and Related Structures Construction) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 1382 - Oil and Gas Field Exploration Services, 1389 - Oil and Gas Field Services, NEC, 1623 - Water, Sewer, Pipeline, and Communications and Power Line Construction, 1629 - Heavy Construction NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 237120:
- Sector 23 Directory Hub — List of related industries in the Construction sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 237120 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Oil and Gas Pipeline and Related Structures Construction).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.