2022 NAICS national industry in sector 23 Construction
237120 Oil and Gas Pipeline and Related Structures Construction
NAICS 237120 is the US industry code for oil and gas pipeline and related structures construction. It covers establishments primarily engaged in the construction of oil and gas lines, mains, refineries, and storage tanks.
- Code
- 237120 (2022 NAICS)
- Title
- Oil and Gas Pipeline and Related Structures Construction
- Part of
- Utility System Construction
- SBA small business limit
- Average annual receipts up to $45 million
- Closest UK SIC
- 42210, 42220, 42910, 42990 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
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.
Examples Census gives
- 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
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- 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.
- Manufacturing floating oil and gas drilling and production platforms are classified in U.S. Industry 336611, Ship Building and Repairing.
Activities listed under 237120
The Census index assigns these 24 activities to this code. If your business matches one, this is your code.
- Compressor, metering and pumping station, gas and oil pipeline, construction
- Construction management, oil and gas pipeline
- Construction management, oil refinery and petrochemical complex
- Corrosion protection, underground pipeline and oil storage tank
- Distribution line, gas and oil, construction
- Gas main construction
- Gathering line, gas and oil field, construction
- Manhole, oil and gas, construction
- Natural gas pipeline construction
- Natural gas processing plant construction
- Oil and gas field distribution line construction
- Oil pipeline construction
- Oil refinery construction
- Petrochemical plant construction
- Petroleum refinery construction
- Pipe lining (except thermal insulating) contractors
- Pipeline construction on oil and gas field gathering lines to point of distribution on a contract basis
- Pipeline rehabilitation contractors
- Pipeline wrapping contractors
- Pipeline, gas and oil, construction
- Pumping station, gas and oil transmission, construction
- Refinery, petroleum, construction
- Service line, gas and oil, construction
- Storage tank, natural gas or oil, tank farm or field, construction
SBA size standard for 237120
To count as a small business for SBA loans and federal contracts under NAICS 237120, your business (including affiliates) must not exceed $45 million in average annual receipts. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 4220, 4290), so treat them as a starting point and check the definition.
- 42210Construction of utility projects for fluidsUK SIC
- 42220Construction of utility projects for electricity and telecommunicationsUK SIC
- 42910Construction of water projectsUK SIC
- 42990Construction of other civil engineering projects n.e.c.UK SIC
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.