Harmonized System
U.S. exports of Safety or Relief Valves (HS 848140) totaled $67.1M in August 2026.
Importers of Safety or Relief Valves paid $4.2M in duties in August 2026, an average duty rate of 10.69% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataSafety and relief valves protect pressurized systems — boilers, pressure vessels, pipelines, and process equipment — from overpressure events, and their design and performance are typically governed by ASME, API, or equivalent standards that end-use customers require importers to document. Unlike other valve headings, this heading consolidates all safety and relief valve types into a single 10-digit line (8481400000), so classification disputes within the heading are rare; the more common issue is distinguishing safety/relief valves from pressure-reducing valves (heading 848110) when a valve performs both functions. Mexico leads US import supply, with Germany and Canada also significant sources. Importers should verify whether specific applications — such as nuclear or high-pressure steam service — trigger additional regulatory requirements beyond standard CBP entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3.5K import shipments a month
The functional distinction is the operating mode: a safety or relief valve remains closed under normal operating conditions and opens only when system pressure exceeds a set threshold, discharging fluid to protect the system. A pressure-reducing valve (heading 848110) continuously modulates downstream pressure during normal operation. CBP will look to the valve's design specifications, set-point mechanism, and intended installation context to resolve borderline cases.
While CBP does not require ASME or API certification as a condition of customs entry, many US end-use applications — including boilers, unfired pressure vessels, and certain pipeline systems — require valves to carry ASME Section I, Section VIII, or API 526 certification under applicable state or federal safety codes. Importers should confirm with their customers which certifications are required before sourcing, as non-certified valves may be legally imported but commercially unusable in regulated installations.
Subheading 4 of 6 in heading 8481
Subheading 848140 · $67.1M of $1.3B
Trade Directory
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8481400000 | Safety or Relief Valves | $39.7M | 10.69% | 74.42% | $4.2M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8481400000 | Safety or Relief Valves | $67.1M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Exports · August 2026
destination
customs district
origin
entry
rate provision · imports
25.6% enters free of duty; duty collected equals 10.69% of imports for consumption.
ImportsExports
Imports
$39.7MYoY · free account
Exports
$67.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $476.5M of Safety or Relief Valves and exported $776.5M.
Through August 2026. Source: U.S. Census Bureau.