NAICS Code 33121: Iron and Steel Pipe and Tube Manufacturing from Purchased Steel
NAICS industry
Definition
This industry comprises establishments primarily engaged in manufacturing welded, riveted, or seamless pipe and tube from purchased iron or steel.
Government contracts for this product: PSC 4710 Pipe, Tube and Rigid Tubing
Code facts
- Part of
-
-
31-33
-
331
- 3312
-
331
-
31-33
- Codes under it
- 1
- Contract awards
- 626 In the last 12 months
- Contract obligations
- $14,478,571 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 331210
- Boiler tubes, wrought, made from purchased iron
- Conduit, welded and lock joint, made from purchased iron or steel
- Pipe (e.g., heavy riveted, lock joint, seamless, welded) made from purchased iron or steel
- Tube (e.g., heavy riveted, lock joint, seamless, welded) made from purchased iron or steel
- Tubing, mechanical and hypodermic sizes, cold-drawn stainless steel, made from purchased steel
- Well casings (e.g., heavy riveted, lock joint, welded, wrought) made from purchased iron or steel
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $14,400,022 |
| FY2025 | $14,478,571 |
| FY2024 | $19,814,970 |
| FY2023 | $15,580,419 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Centroid, Inc. | $3,956,295 | |
| 2 | Aviator Systems Inc. | $1,074,555 | |
| 3 | Rudy Iii, Ernest | $964,428 | |
| 4 | Bb&G Enterprises Inc. | $905,026 | |
| 5 | JBL System Solutions LLC | $498,144 | |
| 6 | Sarco Inc. | $464,376 | |
| 7 | Argo Turboserve Corporation | $374,150 | |
| 8 | Hoopoe Labs Inc. | $349,993 | |
| 9 | AB Group Inc. | $339,567 | |
| 10 | Wickcraft Company, Inc. | $319,908 |
See the full FY2025 ranking of NAICS 33121 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Defense Logistics Agency | $11,926,148 | |
| 2 | Department of the Army | $1,183,542 | |
| 3 | Department of the Interior | $389,046 | |
| 4 | Department of Agriculture | $350,001 | |
| 5 | Department of Energy | $233,257 | |
| 6 | Department of the Navy | $161,578 | |
| 7 | Department of State | $116,077 | |
| 8 | Department of Justice | $52,018 | |
| 9 | Department of Homeland Security | $10,675 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 4710 Pipe, Tube and Rigid Tubing | $7,449,597 | |
| 2 | 6130 Converters, Electrical, Nonrotating | $3,956,295 | |
| 3 | 9640 Iron and Steel Primary and Semifinished Products | $1,146,178 | |
| 4 | 3895 Miscellaneous Construction Equipment | $589,551 | |
| 5 | 5450 Miscellaneous Prefabricated Structures | $518,405 | |
| 6 | 5970 Electrical Insulators and Insulating Materials | $393,998 | |
| 7 | 5630 Pipe and Conduit, Nonmetallic | $136,131 | |
| 8 | 4920 Aircraft Maintenance and Repair Shop Specialized Equipment | $58,759 | |
| 9 | 5975 Electrical Hardware and Supplies | $52,815 | |
| 10 | 5660 Fencing, Fences, Gates and Components | $38,873 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | New York | $2,699,511 | |
| 2 | Florida | $1,249,011 | |
| 3 | Texas | $1,051,629 | |
| 4 | California | $999,824 | |
| 5 | Maryland | $907,545 | |
| 6 | New Jersey | $658,281 | |
| 7 | Pennsylvania | $448,758 | |
| 8 | Washington | $351,013 | |
| 9 | Virginia | $340,695 | |
| 10 | Wisconsin | $327,017 | |
| 11 | Ohio | $255,333 | |
| 12 | Connecticut | $255,260 | |
| 13 | Arizona | $199,844 | |
| 14 | Nebraska | $179,620 | |
| 15 | Illinois | $161,134 | |
| 16 | Louisiana | $133,252 | |
| 17 | Wyoming | $127,260 | |
| 18 | Missouri | $126,746 | |
| 19 | Tennessee | $106,062 | |
| 20 | Nevada | $71,714 | |
| 21 | Oklahoma | $61,778 | |
| 22 | Kansas | $46,120 | |
| 23 | Minnesota | $44,813 | |
| 24 | Michigan | $40,956 | |
| 25 | South Dakota | $38,780 | |
| 26 | North Dakota | $35,238 | |
| 27 | Georgia | $32,158 | |
| 28 | Iowa | $27,320 | |
| 29 | Massachusetts | $18,027 | |
| 30 | Kentucky | $15,078 | |
| 31 | Delaware | $7,480 | |
| 32 | Utah | $1,854 | |
| 33 | Oregon | $650 |
Show all 33
Shares are of everything obligated under NAICS 33121 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 4,774 listed here. See the rest on GovTribe.
Codes under 33121
| NAICS code | Size standard |
|---|---|
| 331210 Iron and Steel Pipe and Tube Manufacturing from Purchased Steel | 1,000 employees |
Quick answers
What is NAICS 33121?
NAICS 33121 is Iron and Steel Pipe and Tube Manufacturing from Purchased Steel, a NAICS industry in NAICS 31-33, Manufacturing.
What is the NAICS code for boiler tubes, wrought, made from purchased iron?
The NAICS code for boiler tubes, wrought, made from purchased iron is 331210, Iron and Steel Pipe and Tube Manufacturing from Purchased Steel. Its SBA small business size standard is 1,000 employees.
What is the NAICS code for conduit, welded and lock joint, made from purchased iron or steel?
The NAICS code for conduit, welded and lock joint, made from purchased iron or steel is 331210, Iron and Steel Pipe and Tube Manufacturing from Purchased Steel. Its SBA small business size standard is 1,000 employees.
What is the NAICS code for pipe (e.g., heavy riveted, lock joint, seamless, welded) made from purchased iron or steel?
The NAICS code for pipe (e.g., heavy riveted, lock joint, seamless, welded) made from purchased iron or steel is 331210, Iron and Steel Pipe and Tube Manufacturing from Purchased Steel. Its SBA small business size standard is 1,000 employees.
What codes are under NAICS 33121?
NAICS 33121 has one code under it with its own GovTribe page, 331210 Iron and Steel Pipe and Tube Manufacturing from Purchased Steel.
How much do federal agencies spend under NAICS 33121?
Federal contracts under NAICS 33121 obligated $14,478,571 in fiscal year 2025 and $64,273,982 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 33121?
The contractors with the most obligated under NAICS 33121 in fiscal years 2026 and 2027 are Centroid, Inc. ($3,956,295); Aviator Systems Inc. ($1,074,555); and Rudy Iii, Ernest ($964,428).
Which agencies buy the most under NAICS 33121?
The agencies that obligated the most under NAICS 33121 in fiscal years 2026 and 2027 are Defense Logistics Agency ($11,926,148), Department of the Army ($1,183,542) and Department of the Interior ($389,046).
Which PSC codes are used with NAICS 33121?
The PSC codes with the most obligated under NAICS 33121 in fiscal years 2026 and 2027 are 4710 Pipe, Tube and Rigid Tubing; 6130 Converters, Electrical, Nonrotating; and 9640 Iron and Steel Primary and Semifinished Products.
Where is the work under NAICS 33121 performed?
By place of performance, the states with the most contract obligations under NAICS 33121 over the last 12 months are New York ($2,699,511), Florida ($1,249,011) and Texas ($1,051,629).
What is the latest contract opportunity under NAICS 33121?
The latest contract opportunity under NAICS 33121 is Steel tube, solicitation from MICC Fort Drum, posted October 30, 2026.
On GovTribe
See everything under NAICS 33121
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