Registry · NAICS Index · Sector 23

237120 — Oil and Gas Pipeline and Related Structures Construction

NAICS 237120 is 'Oil and Gas Pipeline and Related Structures Construction', a 2022 U.S. national industry under Sector 23 (Construction); the SBA small-business size standard is $45,000,000 (defined under 13 CFR § 121.201).

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

NAICS Structure: 237120 National Industry
Sector (2)
23
Construction
Subsector (3)
237
Heavy and Civil Engineering Construction
Industry Group (4)
2371
Utility System Construction
Industry (5)
23712
Oil and Gas Pipeline and Related Structures Construction
National Industry (6)
237120
Oil and Gas Pipeline and Related Structures Construction

Legacy SIC Concordance

Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.

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: