PSC H344

Overview

The Product Service Code (PSC) taxonomy classifies goods and services used across U.S. federal procurement systems (for example, FPDS and SAM). The PSC Manual on Acquisition.gov provides the authoritative descriptors, assignment guidance, and periodic updates that govern PSC usage and interpretation. ¹

PSC H344 is recorded as "Inspection- Furnace, Steam Plant, and Drying Equipment; Nuclear Reactors." Agencies apply this code to identify inspection, testing, and quality-control services related to industrial boilers, furnaces, dryers, steam-plant equipment, and specified nuclear-reactor inspection activities per the PSC Manual descriptor. Use of H344 in award records typically indicates line items or deliverables focused on inspection, condition assessment, or instrumentation checks rather than durable equipment procurement. ¹

See also on G2X:

• G2X — PSC H344 overview
• G2X — PSC H343
• G2X — PSC H345

What this PSC covers

• Boiler and industrial-furnace inspection and testing services.
• Steam-plant performance and safety inspections.
• Drying and dehydrator equipment inspection services.
• Nuclear-reactor inspection activities and related instrumentation checks.
• Commercial testing and laboratory services supporting the above. ¹

Related NAICS and PSC codes

Source: PSC Manual and federal award records indicating PSC-to-NAICS usage. ¹

How agencies typically use H344

Federal solicitations and award records use H344 to tag line items for inspection and testing of boiler, furnace, drying, steam-plant, and nuclear-reactor equipment. FPDS award entries show H344 paired with professional-services NAICS such as 541330 when inspection or engineering-assessment services are procured. ²

Common contract activities under H344

• Safety and regulatory-compliance inspections for boilers and steam systems. ¹
• Non-destructive testing and condition assessments for furnaces and dryers. ¹
• Periodic performance testing and reporting required by an agency performance work statement (PWS) or statement of work (SOW). ¹

Frequently asked questions

• What does the code H344 specifically signify on award records?

H344 identifies inspection and testing services related to furnaces, steam plants, drying equipment, and nuclear-reactor inspection activities as described in the PSC Manual; it classifies inspection/testing line items rather than equipment purchases. ¹

• Which NAICS codes are commonly paired with PSC H344 in awards?

Agencies commonly pair H344 with professional-services NAICS such as 541330 (Engineering Services) in FPDS award records when contracting inspection or engineering-assessment services. ²

• Is H344 limited to nuclear-reactor inspections?

No. The descriptor includes nuclear-reactor inspection activities but is not limited to them; H344 broadly covers inspection services for furnaces, dryers, boilers, and steam-plant equipment as well. ¹

• Where can I confirm the official descriptor and any updates to H344?

The authoritative listing and updates are published in the PSC Manual on Acquisition.gov, which provides the formal PSC descriptors and periodic XLSX/data releases. ¹

Useful resources

• G2X — PSC H344 overview
• PSC Manual (PSC April 2025 XLSX) — Acquisition.gov ¹
• FPDS award/search — FPDS.gov examples of H344 mapped to NAICS and award records ²

References

1. Acquisition.gov — PSC April 2025 (PSC Manual and data file). https://www.acquisition.gov/content/psc-april-2025.xlsx.
2. FPDS.gov — FPDS-NG award/search (records showing PSC H344 mapped to NAICS such as 541330). https://www.fpds.gov/ezsearch/search.do.