Irritanthazardsymbol

The United Nations has designed GHS hazard pictograms and GHS hazard statements to internationally harmonize chemical hazard warnings under the Globally Harmonized System of Classification and Labelling of Chemicals. These symbols have gradually replaced nation and region specific systems such as the European Union's Directive 67/548/EEC symbols,[28] Canada's Workplace Hazardous Materials Information System.[29] It has also been adopted in the United States for materials being sold and shipped by manufacturers, distributors and importers.[30] The USA previously did not mandate a specific system, instead allowing any system, provided it had met certain requirements.[31]

Biohazard symbol

The Workplace Hazardous Materials Information System, or WHMIS, is Canada's national workplace hazard communication standard, first introduced in 1988, and included eight chemical hazard symbols.[34] This system was brought into alignment with GHS in 2015, with a gradual phase in of GHS symbols and label designs through 15 December 2025.[29] The WHMIS system does deviate from GHS by retaining the former WHMIS symbol for Class 3, Division 3, biohazardous infectious materials, as GHS lacks a biological hazard symbol.[29]

Guidelines for lockout-tagout OSHA has developed a series of guidelines to properly implement lockout-tagout. There are three elements to lockout-tagout that consist of training, written procedures and inspections. Training will likely encompass many workers, from maintenance workers who perform the lockout-tagout procedure, to affected employees, or those who work near equipment that will be shut off.

The biohazard symbol was developed in 1966 by Charles Baldwin, an environmental-health engineer working for the Dow Chemical Company on their containment products.[21]

Flammable symbol

Healthhazardsymbol

Work sites can be some of the most hectic areas on any given day. Employees are scuffling around completing their hourly and daily tasks. Often, their work involves the use of heavy machinery and other types of dangerous equipment, and because of their line of work, danger tags are needed whenever possible. This mindset should apply for every industry and not only ones where heavy, dangerous, machinery is used daily.

Each category also has a subset of tags that provides even more specific information for management and workers. For example, equipment status can be broken down into out of service tags, which informs workers when a piece of equipment is not working for the time being. Likewise, repair tags will also let workers know when something is undergoing maintenance and employees can even find out the status of gas cylinders. Any work site can find the right danger tag.

Some warning symbols have been redesigned to be more comprehensible to children, such as the Mr. Ouch (depicting an electricity danger as a snarling, spiky creature) and Mr. Yuk (a green frowny face sticking its tongue out, to represent poison) designs in the United States.

The sign is commonly referred to as a radioactivity warning sign, but it is actually a warning sign of ionizing radiation. Ionizing radiation is a much broader category than radioactivity alone, as many non-radioactive sources also emit potentially dangerous levels of ionizing radiation. This includes x-ray apparatus, radiotherapy linear accelerators, and particle accelerators. Non-ionizing radiation can also reach potentially dangerous levels, but this warning sign is different from the trefoil ionizing radiation warning symbol.[15] The sign is not to be confused with the fallout shelter identification sign introduced by the Office of Civil Defense in 1961. This was originally intended to be the same as the radiation hazard symbol but was changed to a slightly different symbol because shelters are a place of safety, not of hazard.[10][16]

Toxic symbol

Importance of danger tags Danger tags come in many colors and variations depending on where they need to be used. According to Safety Sign, these tags exist for inventory check, electrical hazards, equipment status and inspections.

Controlling hazardous energy sources is paramount for any work site. According to an OSHA fact sheet, approximately 3 million workers face dangerous conditions when working with energy sources. Laborers, craft workers and machine operators are perhaps the largest group of workers facing the greatest dangers.

In the United States, due to concerns that the skull-and-crossbones symbol's association with pirates might encourage children to play with toxic materials, the Mr. Yuk symbol is also used to denote poison.

The European Union aligned its regulations with the GHS standards in 2008 with the adoption of CLP Regulation, replacing its existing Directive 67/548/EEC symbols during the mid-2010s, and requiring use of GHS symbols after 1 June 2017.[32][33] Since 2015, European standards are set by:

Hazard symbols are recognizable symbols designed to warn about hazardous or dangerous materials, locations, or objects, including electromagnetic fields, electric currents; harsh, toxic or unstable chemicals (acids, poisons, explosives); and radioactivity. The use of hazard symbols is often regulated by law and directed by standards organizations. Hazard symbols may appear with different colors, backgrounds, borders, and supplemental information in order to specify the type of hazard and the level of threat (for example, toxicity classes). Warning symbols are used in many places in place of or in addition to written warnings as they are quickly recognized (faster than reading a written warning) and more universally understood, as the same symbol can be recognized as having the same meaning to speakers of different languages.[citation needed]

Corrosive symbol

Work sites should also keep size in mind when using danger tags. It doesn't help to put up small electrical tags that workers may not even see. The utilization of danger tags is a must for work sites across various industries and in case the lines of communication are severed, tags can still inform workers of important information.

The symbol, or some variation thereof, specifically with the bones (or swords) below the skull, was also featured on the Jolly Roger, the traditional flag of European and American seagoing pirates. It is also part of the Canadian WHMIS home symbols placed on containers to warn that the contents are poisonous.

Tape with yellow and black diagonal stripes is commonly used as a generic hazard warning. This can be in the form of barricade tape, or as a self-adhesive tape for marking floor areas and the like. In some regions (for instance the UK)[5] yellow tape is buried a certain distance above buried electrical cables to warn future groundworkers of the hazard.

On February 15, 2007, two groups—the International Atomic Energy Agency (IAEA) and the International Organization for Standardization (ISO)—jointly announced the adoption of a new ionizing radiation warning symbol to supplement the traditional trefoil symbol. The new symbol, to be used on sealed radiation sources, is aimed at alerting anyone, anywhere to the danger of being close to a strong source of ionizing radiation.[17] It depicts, on a red background, a black trefoil with waves of radiation streaming from it, along with a black skull and crossbones, and a running figure with an arrow pointing away from the scene. The radiating trefoil suggests the presence of radiation, while the red background and the skull and crossbones warn of danger. The figure running away from the scene is meant to suggest taking action to avoid the labeled material. The new symbol is not intended to be generally visible, but rather to appear on internal components of devices that house radiation sources so that if anybody attempts to disassemble such devices they will see an explicit warning not to proceed any further.[18][19]

Lockout-tagout importance Also known as lock and tag, this safety procedure is vital to ensure equipment and other machines are properly turned off and remain so during scheduled maintenance. According to the University of California Santa Cruz's environmental health and safety division, serious accidents have occurred because a worker mistakenly believed a machine was safely off. Lockout-tagout also guards against other factors that may introduce safety hazards. For instance, machines may start up unexpectedly because stored energy was not correctly, or properly, released.

As with most aspects of the work site, there are certain guidelines to help enable best practices. OSHA has developed certain specifications to follow. For instance, caution signs must be designed a certain way. According to 1910.145(d)(4), these caution signs must:

According to Baldwin, who was assigned by Dow to its development: "We wanted something that was memorable but meaningless, so we could educate people as to what it means." In an article in Science in 1967, the symbol was presented as the new standard for all biological hazards ("biohazards"). The article explained that over 40 symbols were drawn up by Dow's artists, and all of the symbols investigated had to meet a number of criteria: "(i) striking in form in order to draw immediate attention; (ii) unique and unambiguous, in order not to be confused with symbols used for other purposes; (iii) quickly recognizable and easily recalled; (iv) easily stenciled; (v) symmetrical, in order to appear identical from all angles of approach; and (vi) acceptable to groups of varying ethnic backgrounds." The chosen scored the best on nationwide testing for uniqueness and memorability.[20]

On roadside warning signs, an exclamation mark is often used to draw attention to a generic warning of danger, hazards, and the unexpected. In Europe and elsewhere in the world (except North America and Australia), this type of sign is used if there are no more-specific signs to denote a particular hazard.[6][7] When used for traffic signs, it is accompanied by a supplementary sign describing the hazard, usually mounted under the exclamation mark.

The skull-and-crossbones symbol, consisting of a human skull and two bones crossed together behind the skull, is today generally used as a warning of danger of death, particularly in regard to poisonous substances.

hazardsymbols意思

A chemical hazard symbol is a pictogram applied to containers and storage areas of dangerous chemical compounds to indicate the specific hazard, and thus the required precautions. There are several systems of labels, depending on the purpose, such as on the container for transportation, containers for end-use, or on a vehicle during transportation.

Hazardsymbols and meanings

An effective form of communication for work sites are safety tags. They are available for multiple areas and come in bright colors to catch the attention of workers passing by. For those that handle various forms of energy, lockout-tagout procedures are required to prevent any injuries. Proper practices will go a long way toward protecting every worker ensuring a strong line of communications.

This symbol has also been more widely adopted for generic use in many other contexts not associated with poisonous materials. It used for denoting number of dead victims caused by natural disasters (e.g. earthquakes) or armed conflicts on event infographics.

The symbol was adopted as a standard in the US by ANSI in 1969.[10][12] It was first documented as an international symbol in 1963 in International Organization for Standardization (ISO) recommendation R.361.[13] In 1974, after approval by national standards bodies, the symbol became an international standard as ISO 361 Basic ionizing radiation symbol.[14] The standard specifies the shape, proportions, application and restrictions on the use of the symbol. It may be used to signify the actual or potential presence of ionizing radiation. It is not used for non-ionizing electromagnetic waves or sound waves. The standard does not specify the radiation levels at which it is to be used.[14]

This symbol has also been more widely adopted for generic use in many other contexts not associated with road traffic. It often appears on hazardous equipment, in instruction manuals to draw attention to a precaution, on tram/train blind spot warning stickers and on natural disaster (earthquake, tsunami, hurricane, volcanic eruption) preparedness posters/brochures—as an alternative when a more-specific warning symbol is not available.

Without these danger tags, safety is pushed aside, since workers aren't aware of any and all possible hazards. When used in conjunction with the lock and tag safety procedure, work sites are helping safeguard the health of workers but are also in compliance with various regulations and guidelines put forth by the U.S. Occupational Safety and Health Administration.

The international radiation symbol is a trefoil around a small central circle representing radiation from an atom. It first appeared in 1946 at the University of California, Berkeley Radiation Laboratory.[8] At the time, it was rendered as magenta, and was set on a blue background. The shade of magenta used (Martin Senour Roman Violet No. 2225) was chosen because it was expensive and less likely to be used on other signs.[9] However, a blue background for other signs started to be used extensively. Blue was typically used on information signs and the color tended to fade with weathering. This resulted in the background being changed on the radiation hazard sign.[10] The original version used in the United States is magenta against a yellow background, and it is drawn with a central circle of radius R, an internal radius of 1.5R and an external radius of 5R for the blades, which are separated from each other by 60°. The trefoil is black in the international version, which is also used in the United States.[11]

All parts of the biohazard sign can be drawn with a compass and straightedge. The basic outline of the symbol is a plain trefoil, which is three circles overlapping each other equally like in a triple Venn diagram with the overlapping parts erased. The diameter of the overlapping part is equal to half the radius of the three circles. Then three inner circles are drawn in with 2⁄3 radius of the original circles so that it is tangent to the outside three overlapping circles. A tiny circle in center has a diameter 1⁄2 of the radius of the three inner circles, and arcs are erased at 90°, 210°, and 330°. The arcs of the inner circles and the tiny circle are connected by a line. Finally, the ring under is drawn from the distance to the perimeter of the equilateral triangle that forms between the centers of the three intersecting circles. An outer circle of the ring under is drawn and finally enclosed with the arcs from the center of the inner circles with a shorter radius from the inner circles.[11]

The US-based National Fire Protection Association (NFPA) has a standard NFPA 704 using a diamond with four colored sections each with a number indicating severity 0–4 (0 for no hazard, 4 indicates a severe hazard).[35] The system was developed in the early 1960s, as a means to warn firefighters of possible dangers posed by storage tanks filled with chemicals. The red section denotes flammability. The blue section denotes health risks. Yellow represents reactivity (tendency to explode). The white section denotes special hazard information, not properly covered by the other categories, such as water reactivity, oxidizers, and asphyxiant gases.[35]

The biohazard symbol is used in the labeling of biological materials that carry a significant health risk, including viral and bacteriological samples, including infected dressings and used hypodermic needles (see sharps waste).[20]

Work sites should implement those regulations, but also remember other safety habits. Before any maintenance starts, all involved parties have to coordinate a timeframe and the specific equipment that will be shut off. From there, employees will follow proper procedures for shutting off equipment and completing the required maintenance.

OSHA estimates, because of lockout-tagout, approximately 50,000 injuries and 120 fatalities are avoided each year. There are various energy sources that can harm employees, as highlighted by Lockout-Tagout Shop, some of which include: