Safety shoes
Safety shoes are a general term for safety shoes and protective shoes. They are generally used in different working situations to protect the feet and legs from predictable injuries.
Type: safety shoes
Standard: GB21148-2007 / EN - 2007
Meaning: safety shoes and protective shoes
Objective: protecting foot and leg
Safety shoe international standard
Safety shoes China
The current safety shoe standard in China is GB21148-2007. The safety shoe standard in China is formulated according to the European standard.
Gb4014-83 leather safety shoes; Gb7054-86 rubber outsole safety boots.
Safety shoes belong to high-tech content and high added value of footwear products, safety shoes production process for raw materials, auxiliary materials, chemical materials, mechanical equipment, such as demand is very high, many with certain scale and level of the current domestic shoemaking enterprise has set his sights on safety shoes this past by developed countries occupy the market areas.
Safety shoes Europe
European standard EN345 "special safety, protection and working shoes" the European standard was formulated by the CEN/TC61 technical committee on foot and leg protection, with the secretariat of the BSI. This standard sets the structure and performance indexes of safety protective shoes, such as the design of style, the whole shoes, the upper side, the inside of the shoes, the tongue of the shoes, the inner bottom and the outer bottom. The test method of each project specified in the standard is similar to other similar standards, and the principle of the method is generally applicable to most safety protective shoes.
Safety shoes USA
(ansi-z41-1991) according to the resistance of shoes to compression and impact, safety shoes with protective steel toe cap can be classified into different types.
Safety shoe parameters
Safety shoe head impact resistance
The impact test is carried out with steel hammer of specified weight. When the head is impacted, the clearance height under the head should be less than the specified value, and there should be no penetrating cracks in the direction of the test axis. It is worth noting that the weight, specification, impact height and structure of the hammer are different in the standards of various countries, which should be distinguished in actual testing.
Safety shoes for puncture resistance
The test machine is equipped with a pressure plate and a test nail is installed on the pressure plate. The test nail is a truncated head, and the hardness of the nail head should be greater than 60HRC. Place the sole sample on the chassis of the test machine. The position allows the test nail to puncture through the outer bottom. The test pin penetrates the sole at a speed of 10mm /min plus or minus 3mm /min. 4 points on each sole were selected for the test (at least 1 point was at the heel). The distance between each point was no less than 30mm, and the distance between each point and the inner bottom edge was more than 10mm. The bottom with antiskid block should be punctured between blocks. Two of the four points should be tested within a distance of 10-15 mm from the edge line where the implant is located. If the humidity will affect the results, the test should be before the sole in 20 ℃ + 2 ℃ deionized water for 16 + 1 h.
Safety shoes anti - static performance
After the sample is adjusted in a dry and wet atmosphere, the clean steel ball is filled into the shoe and placed on the metal probe device. The resistance between the first two probes and the third probe is measured using the specified resistance test instrument. In general, the resistance of conductive shoes should not be greater than l00K ohm. Antistatic shoes require resistance between 100K ohm and 100M ohm.
The thermal insulation performance of the safety shoes is to take the shoes as samples, install the thermocouple in the center of the inner bottom connection area, and fill the steel ball into the shoes. To regulate the temperature of the sand bath pot to 150 ℃, 5 ℃, put on it, the shoe made of sand in contact with the shoes outsole, use in connection with the thermocouple temperature test device, measuring the temperature of the inner bottom and the appropriate time, the increase of the temperature curve is given. The increased temperature was calculated 30min after the sample was placed on the sand bath. General insulation shoes the added value of the inner bottom surface temperature is less than 22 ℃.
Safety shoe heel performance
The maximum compression load of the test instrument is 6000N, equipped with a device for recording load/deformation characteristics. Place the heel sample on a steel plate and place the test punch in the center of the heel against the inner bottom. The load is applied at a speed of 10mm/min x 3mm /min. Draw the load/compression curve and calculate the absorbed energy E, expressed in joule.
Safety shoe skid resistance
This standard stipulates to test the anti-skid coefficient of the sole, but it also stipulates the design and specification of the anti-skid block, such as the thickness of the sole, the height of the anti-skid block and the distance from the edge of the sole.
Safety shoes are acid and alkali resistant
Suitable for electroplating, pickling, electrolytic, liquid dispensing, chemical operators, etc. Note: acid-proof shoes can only be used in low concentration acid-base workplaces. Avoid contact with high temperature, sharp device damage upper or sole leakage; After wearing, rinse the acid-base liquid on the shoes with water and then dry to avoid direct sunlight or drying.
1. Hardness changes (IRHD) sulphuric acid, hydrochloric acid and sodium hydroxide were observed H= + / - 10. (the test result is +6, +4, +3, meeting the standard)
2. Quality change (%) of sulfuric acid, hydrochloric acid, sodium hydroxide, etc. is + or - 2(the test results are +0.6, +0.5, +0.6, meeting the standards).
3. Tensile properties (%) the tensile strength of sulfuric acid, hydrochloric acid and sodium hydroxide decreased less than 15 (the test results were -8, -6 and -4, meeting the standards).
4. Tensile elongation rate (%) the variation of sulfuric acid, hydrochloric acid and sodium hydroxide does not exceed + / -20 (the test results are -8, -5 and -4, meeting the standard).
Safety shoe function
With the continuous progress of shoe-making technology in China and the update of shoe materials around the world, safe footwear varieties are gradually diversified and high-end. Safety shoes design and technical requirements of domestic and abroad has standards, using computerized management, electric insulation, antistatic, acid and alkali resistant, puncture proof, protect the toes, general protective shoes six categories, has good resistance to oil, prevent hit, anti-static, piercing, acid and alkali resistance and insulation performance, points SB/SBP/S1 / S1P/S2 / S3 six security levels, is widely used in machinery, metallurgy, construction, chemical, pharmaceutical, mining, oil field, electric power industries. Every pair of shoes through process quality control of the company and the factory strict testing, in line with national safety standards (most of the index exceeded national standards) and the European safety shoes EN345 standard, the product has been more than 500 domestic industrial and mining enterprises, especially in Europe and the United States joint venture, and exported to the European Union, the United States and Australia and other countries.
Safety shoe function description
Safety shoes are a general term for safety shoes and protective shoes. They are generally used in different working situations to protect the feet and legs from predictable injuries. Different safety shoes have different application scopes and different requirements for the function of safety shoes. The specific performance is:
Safety shoes for toe protection: the safety of inner head can be grade AN1, which is suitable for metallurgy, mining, forestry, port, loading and unloading, stone mining machinery, construction, petroleum, chemical industry, etc.
Safety shoes for puncture prevention: the anti-puncture strength is grade 1, which is applicable to mining, fire control, construction, forestry, cold work and machinery industry.
Safety shoe
Using industry standards (protect toes shoes LD50-94), to protect the toes safety shoes lining for baotou steel, has both static pressure resistance and impact resistance, puncture-proof, smashing, very safe, upon examination, resistance to pressure for 10 kn, 23 kg impact hammer toe resistance to impact since 450 mm height of free fall impact the top of the shoe, shoes inside deformation > = 15 mm gap, mainly is suitable for the mining, machinery and construction safety, metallurgy, steel, port loading used in heavy industry, such as, play a protective toes safety shoes, there is rubber and elastomer, wearing comfortable, and does not affect the daily operation of labor.
Safety shoes prevent puncture
To protect the foot from the puncture of sharp objects, to withstand the puncture force of 1100N, national special level standard.
Safety shoes are antistatic
Anti-static shoes according to GB4385-1995 standard production, the resistance value range is 100 k 'Ω Ω - 1000 - m', the product has good permeability, antistatic, wear-resisting, prevent slippery, and other functions, mainly is suitable for the aviation, space has played a very light industry to avoid danger because of static electricity and inflammable and explosive accident.
Oil resistance of safety shoes
According to the test of oil resistance standard, the volume increase is no more than 12%. If the volume does not increase, but decreases, the reduction is greater than 0.5% of the original volume or the hardness increases more than 10 (shor A), according to GB/T 3903. It is stipulated that the growth of flexural fractures of 40,000 times is not greater than 7mm.
Safety shoe maintenance method
Safety shoes need to be properly used and maintained to ensure proper performance and maintain the foot health of users. Therefore, more attention should be paid to the following matters:
First of all: regularly clean safety shoes, one of the key is not to use solvents as cleaning agents.
Second: often clean the sole, avoid accumulation of dirt, especially insulation safety shoes, the electrical conductivity of the sole or anti-static efficiency will be affected by the dirt of the sole, even life safety.
Again: do not modify the safety shoe structure at will. Because the construction of formal safety shoes is well designed by designers to protect people's safety, random transformation may affect the safety index of safety shoes.
Then: do not use safety shoes should be stored in a cool, dry and well ventilated place. Safety shoes are a tool for people to protect their personal safety.
Safety shoes instructions
Safety shoe toe protection
1. Product implementation standard ld50-1994 toe safety shoes (boots). New national standard gb21148-2007 personal protective equipment safety shoes.
2. The static pressure of toe of grade An1, An2, An3, An4 and An5 is 15KN, 10KN, 4.4kn, 3.0kn and 1.5kn, respectively. Safety shoes of grade An1, An2 and An3 fall freely with 23Kg impact hammer from 900mm, 450mm and 225mm respectively. The clearance inside the shoe head is 15mm or more. Safety shoes of grade An4 and grade An5 fall freely with a 5Kg impact hammer at a height of 450mm and 225mm respectively. The clearance inside the toe is greater than 15mm.
3. An1 is suitable for metallurgy, mining, forestry, port, ship, loading and unloading, rock quarrying, heavy industry and other operations; An2 is applicable to machinery, construction, petrochemical, etc. An3 is applicable to electronics, food, medicine and other industries; An4 ~ An5 is suitable for textile industry and locksmith operation. It is used to protect the toe from injury.
4. During the transportation and storage of safety shoes, direct sunlight, rain and moisture should be avoided. The storage room should be well ventilated, dry, mildew-proof and moth-proof.
Safety shoes anti-static shoes
1. Product implementation standard gb4385-1995. Electrical performance is tested according to appendix A in gb4385-1995.
2. Anti-static shoes are protective shoes that can remove the static electrode of human body and prevent the power click amount below 250V. Suitable for inflammable and explosive workplace.
3. Anti-static shoes shall not be used when insulating shoes. When wearing, thick socks and insulation MATS of insulating wool shall not be worn at the same time.
4. During the wearing of antistatic shoes, the resistance value of shoes should be tested once, generally no more than 200h. Such as resistance to be outside the scope of regulation 100 k Ω - 1000 - m Ω term cannot be used as anti-static shoes to continue. Products over 18 months from the date of production shall be subject to the relevant electrical performance test, which shall be sold and used only if they meet the standard requirements.
5. During storage, the anti-static safety shoes shall be stored in a dry and ventilated warehouse to prevent mildew, pile them away from the ground and walls for more than 0.2m, and leave all heat bodies for more than 1m. During transportation and storage, contact with oil, acid, alkali or other corrosive articles shall be strictly prohibited.
Safety shoes electric insulated shoes
1. Product implementation standard gb12011-2000. Main technical parameters: the experimental voltage is 6KV, and the leakage current is less than 1.8ma.
2. The product is 6KV leather upper insulation shoes, which are suitable for wearing under 1KV in the working environment and used as auxiliary safety equipment and labor protection products shoes. When used, the provisions of the safety engineering rules of the electrical industry (DL408 and DL409) must be strictly observed.
3. When wearing electric insulated shoes, the working environment should keep the vamp dry. (electric shoes are sometimes called electrical shoes.)
4. The product shall be strictly prohibited from contact with sharp objects, high temperature, acid, alkali or other corrosive articles. If there is any corrosion or damage to the bottom, it shall not be used with electric insulating shoes.
5. During storage, it shall be stored in a dry and ventilated warehouse to prevent mildew and pile away from the ground and walls for more than 0.2m. The storage period is 24 months, and the electrical insulation safety shoes over 24 months shall be subject to preventive electrical performance test.
Safety shoes puncture resistant shoes
1. Product implementation standard gb12017-1989, applicable to mining, forestry, fire control, construction and other industries, to prevent foot piercing and wearing of labor protection shoes. It is necessary for labor protection.
2, extra premium, Ⅰ, Ⅱ etc, its wear resistance, respectively is 1100 or higher n, 780 n, 490 n, should be selected according to different work environment corresponding level puncture proof shoes.
3. During transportation and storage, direct sunlight, rain and moisture should be avoided. The storage room should be well ventilated, dry, mildew-proof and moth-proof.
Safety shoes oil resistant protective shoes
1. Product implementation standard gb16756-1997, applicable to factories, coal mines, oil fields and other industries.
2. The product shall be stored for 2 years from the date of production, and the oil-resistant protective shoes shall be stored in a ventilated, dry, mildew-proof and moth-proof place. It is strictly prohibited to contact with acid, alkali or other corrosive articles.
Safety shoes specifications
Antioil shoes are used in places where floor area oil or oil is spilled; Waterproof shoes are used in places where water is accumulated or spilled on the ground. Cold shoes are used to protect the feet of people working at low temperature from frostbite.
Puncture - resistant shoes are used to protect the foot from being stabbed by various hard sharp objects.
The main function of anti-smashing shoes is to prevent falling objects from injuring the feet. The front cover of the shoe has anti-impact material.
The main function of steel-making shoes is to prevent from burning, scalding and cutting. These shoes are suitable for smelting, furnace, cast iron, etc.
In addition to the above, there are also some special cover, such as canvas, asbestos, aluminum film material of the shoe cover.
The selection of protective shoes and the selection of protective shoes should be carried out according to the harmful nature and degree of the working environment. Protective shoes shall have product qualification certificate and product specification. Before using, you should read the manual according to the conditions of use, and use the correct method. Special protective shoes should be checked and kept clean after use and stored in non-polluting and dry places.
Safety shoe size selection
The shoe size that circulates on the market is quite messy, more reliable method is to choose proper safety shoe through try on. It should be comfortable to try on the shoes. The steel head of the shoe head does not squeeze or jam the feet. The toes can move flexibly without the feeling of sliding forward or backward. The so - called fit feet, mainly refers to: the size of shoes and feet match, not large or small; Toes move freely in shoes. The lower back of the shoe supports firmly against the arch of the foot; The heel of the shoe is firm.
Even when choosing a safety shoe by trying it on, the basic point of the choice is not to be ignored. There are mainly the following aspects:
1. The front tip of safety shoes has a certain amount of allowance, especially for safety shoes, because there is a hard steel head in front of them. If you stand for a long time, your toes should have more room to move. Otherwise, your toes will be pressed for a long time. There are a lot of people when choosing safety shoe, feel the safety shoe of the same shoe size is bigger than the fashion shoe that wears normally, this is safety shoe is made according to national requirement to enlarge, actually we wear what size shoe normally, buy what size safety shoe can.
2. Different types of safety shoes require different weight and weight. The fatness and thinness of the foot is represented by the width of the sole and the length of the heel circumference. The fatness and thinness of the shoe is determined by the size of the inner space of the shoe cavity. Consumers can only choose according to the fitting effect.
3. The heel of the safety shoe is not tight or loose
4. The safety vamp should not squeeze the instep
5. The waist of the safety shoe fits the arch of the foot, and the waist should cover the foot
The difference between safety shoes and protective shoes
Many people think that protective shoes are safety shoes, in fact, this statement is not correct. According to China's current standards, safety shoes and protective shoes are two different standards. Safety shoe national standard gb21148-2007, when protecting shoe national standard gb21147-2007, can know from standard number both are different, otherwise, the country also need not make different standard. Specifically, there are many similar national standards for protective shoes and safety shoes. The main differences are as follows:
