ISO 7010 W-series hazard warning labels use the internationally standardized yellow equilateral triangle to communicate hazard conditions without language dependency. Covering electric shock (W012), arc flash (W042), laser beam (W004), flammable material (W027), moving parts (W017), general danger (W001), pinch points, cutting hazards, and others, these labels are well suited for international equipment and multilingual facilities.
We stock a large selection of ISO warning labels available in sizes from 0.375″ square roll stock to 3.75″ base on 3M polyester, UL Recognized and CSA Approved materials.
Under ISO 3864-1 (Safety Colours and Safety Signs), the equilateral triangle with a yellow background and black border is the globally reserved shape for hazard warning. Yellow must cover at least 50% of the total sign area; the black pictogram is centered inside the triangle.
The yellow-triangle format is intentionally shape-coded so that hazard communication is recognizable even when color vision is impaired. ISO 3864-3 specifies the geometric construction rules — proportions, stroke weight, pictogram clearance zones — our expert designers ensure that our labels adhere to these standards.
ISO 7010 registers each safety symbol with a unique letter-prefix identifier. The W prefix (warning) designates symbols that indicate a condition which may cause injury or death if precautions are not taken. Examples of W-series symbols we stock:
Not all sizes are available for every symbol. To request any additional sizes email our sales team at [email protected].
ANSI Z535.4 Warning-format labels (orange header, safety-alert symbol, signal word, and English message text) are the North American standard for product safety labeling and the format referenced by OSHA 29 CFR 1910.145 for compliance in US workplaces. ISO 7010 W-series Hazard labels communicate the same hazard condition using only a registered pictogram inside a yellow triangle — no signal word, no language-specific text.
ANSI Warning labels convey detailed hazard descriptions and consequence/avoidance instructions in English, suited to US facilities with English-speaking workforces. ISO W-series Hazard labels communicate hazard identity in a format readable by workers regardless of language. Many OEM programs apply both on the same piece of equipment — an ANSI Z535.4 label for the full message text and US compliance; an ISO W-series symbol at the hazard point for graphic reinforcement recognized internationally. Consult your product safety engineer or certification body to determine the correct format or combination for your products and target markets.
ISO 3864-1 (Safety Colours and Safety Signs) establishes the yellow equilateral triangle as the international symbol shape for hazard warning and defines the safety color specifications, contrast ratios, and geometric requirements for all ISO safety signs. ISO 3864-2 (Design Principles for Product Safety Labels Using Graphical Symbols) specifies how those design rules apply specifically to labels placed on machinery, vehicles, and equipment. ISO 3864-3 (Design Principles for Graphical Symbols) governs the construction rules for individual pictograms, ensuring visual consistency across manufacturers and revisions. ISO 7010 (Graphical Symbols — Safety Signs — Registered Safety Signs) provides the complete W-series hazard warning symbol library; each registered symbol has passed ISO review for clarity and global recognizability. EU Machinery Directive 2006/42/EC and EU Machinery Regulation 2023/1230 require pictogram-based safety markings on CE-marked machinery; ISO 7010 symbols are the accepted means of conformance. OSHA 29 CFR 1910.145 sets performance requirements for accident-prevention signs and tags in US workplaces without mandating a specific format; ISO 7010 symbols satisfy those performance requirements. Consult each standard directly at iso.org/store for requirements applicable to your products.
3M polyester base with polyester overlaminate, UL Recognized and CSA Approved, rated –40°F to 300°F. Full construction details are on the ISO Safety Labels page.
