Dangerous \"helmet\"”

Safety helmets are special protective equipment; it is advisable to purchase those that come with the \"three certificates and one mark\" (production license, product qualification certificate, safety inspection certificate, and safety mark)

Regarding PPE, it refers to qualified PPE; once a defect is found in the PPE, a new one must be replaced. If a safety helmet is found to be cracked or lack an inner lining, it is an unqualified safety helmet and must be replaced.

Safety helmets have an expiration date, so be sure to check it when wearing them.

Wearing a safety helmet properly, with the straps adjusted at the right tension, is essential to ensure safety.

Damaged safety helmets and other personal protective equipment are also a hazard that should not be ignored!

Only by purchasing qualified personal protective equipment can protection be achieved

This standard has **requirements regarding safety helmets**: issued on November 29, 2006. 1. Subject matter and scope of application: This standard specifies the physical and technical requirements for safety helmets used in industry, as well as the rules for their testing, management, labeling, and packaging. 　　This standard applies to safety helmets commonly used in industry, while the additional special properties specified are applicable only to corresponding special environments. 2 Referenced Standards GB 1410 Test methods for solid electrical insulating materials – Insulation resistance, volume resistivity, and surface resistivity GB 2812 Test methods for safety helmets 3 Terms 3.1 Safety helmet A helmet that provides protection for the human head against external forces. It consists of a cap shell, a lining, a chin strap, a back band, etc. 　3.1.1 Shell The shell of a safety helmet includes the chin strap, brim, top reinforcement, ventilation holes, socket, hole for the strap liner, and chin strap hook. 　　a. Cap tongue: the part that extends from the front of the cap shell ； 　　b. Brim: The part that extends around the crown of the hat, excluding the visor ； 　　c. Top reinforcement: The part used to enhance the strength of the top section of the cap shell ； 　　d. Vent holes: Holes provided on the cap shell ； 　　e. Plug: The insertion structure that connects the plug housing to the plug gasket and accessories ； 　　f. Connection hole: The opening that connects the cap liner and the cap shell. 　3.1.2 Crown lining: A general term for the internal components of the crown. These include crown straps, protective straps, support straps, sweat-absorbing strips, padding, and tie cords. 　　a. Band: A ring that wraps around the head to provide fixation ； 　　b. Straps: Straps that come into direct contact with the top of the head ； 　　c. Straps: An additional layer of strap on top of the support straps that does not touch the head, serving as a cushioning element ； 　　d. Strapping: The rope (band) that connects the support straps and protective straps, as well as the inner lining of the hat and the hat shell ； 　　e. Sweat-absorbing strip: a strip of sweat-absorbing material wrapped around the outside of the hat band ； 　　f. Padding: A cushion that provides cushioning between the headband and the helmet shell ； 　　g. Rear band: An adjustable band is added to the back of the cap band ； 　　h. Hood liner joint: The joint that connects the hood liner to the hood shell. 　3.1.3 Chin strap: A strap attached to the chin. 　3.1.4 Locking clip: A clip used to adjust the length of the chin strap. 　3.1.5 Insertion: The cap shell and the inner lining are connected by insertion. 　3.1.6 Bolting: The cap shell and the inner cap are connected using bolting ropes. 　3.1.7 Riveting: The cap shell and the inner liner are joined using rivets. **The Bureau of Technical Supervision approved GB 2811-89 on 1989-12-01, with implementation set for 1990-08-01; 3.2 Horizontal distance: The distance between the brim of a safety helmet and any horizontal point in the space surrounding the helmet shell when it is worn. 　3.3 Vertical distance: The vertical distance between the top of the head and the inner top of the helmet cover when the helmet is worn (excluding the space for the head strap). 　3.4 Wear height: The vertical distance from the bottom edge of the helmet band to the top of the head when the helmet is worn. 　3.5 Headform: The human head model used when testing safety helmets (see Appendix A). 4 Structural form requirements 4.1 The top of the cap shell should be reinforced. It can be made with a smooth top or a ribbed structure. The hat shell can be edgeless, edged, or rolled. 　4.2 The plastic cap liner shall be designed with a rear band that allows for free adjustment of the band’s size. 　4.3 The chin strap without a rear hoop liner is made in a “Y” shape; those with a rear hoop may be made as a single piece. 　4.4 The strap on the front part of the contact tip should be breathable and sweat-absorbing. 　4.5 The padding around the headband can be made in strip form or in block form, with space provided for air circulation. 5 Size requirements 5.1 Inside the helmet shell a. Length: 195–250 mm ； 　　b. Width: 170--220mm ； c. Height: 120--150mm. 　5.2 Brim length: 10–70 mm. 　5.3 Brim: 0–70 mm, downward tilt 0°–60°. 　5.4 Ventilation pores: Holes in the cap, with a total area of not less than 400 mm2. Special uses are not subject to this restriction. 　5.5 Headband: Available in the following three sizes: Size 1: 610–660 mm; Size 2: 570–600 mm; Size 3: 510–560 mm. 　　The headband can be made separately or used as a universal one. 　5.6 Vertical spacing a. Plastic lining: 25--50mm ； 　　b. Cotton or synthetic fiber tape: 30--50mm. 　5.7 Wearing height: 80--90mm. 　5.8 Horizontal spacing: 5–20 mm. 　5.9 The height of protrusions around the shell interior shall not exceed 6 mm, and there shall be padding around these protrusions. 6 Color Generally, light colors or colors that are easy to notice are preferred. Such as white, light yellow, etc. 7 Weight a. Safety helmets with small rims or edges shall not weigh more than 430 g (excluding accessories) ； 　　b. Safety helmets with a high brim shall not weigh more than 460 g (excluding accessories) ； 　　c. The winter hat shall not weigh more than 690g (excluding accessories). 8 Classification Various safety helmets are classified according to different materials, shapes, and workplaces. 　8.1 Material Classification: 8.1.1 Engineering Plastics: Engineering plastics are mainly divided into two categories: thermoplastic materials and thermosetting materials. It is mainly used to manufacture the shell and lining of safety helmets, as well as the materials for helmet straps. When other substances such as plasticizers and colorants are added, it is important to check whether these components are toxic and may cause skin allergies or inflammation. 　　Plastic caps used in coal mine gas mines should be treated with antistatic agents. 　　Thermosetting materials can be mixed with glass fibers and vinylon fibers and then pressed together. 　8.1.2 Rubber materials: Rubber materials include natural rubber and synthetic rubber. Waste rubber and recycled rubber cannot be used. 　8.1.3 Paper adhesive: Paper adhesives are prepared from raw materials such as wood pulp. 　8.1.4 Plant materials: Plant materials include vines, willow branches, and bamboo. 　8.1.5 Materials for winter hats: The shell of a winter hat can be made from engineering plastics or plant-based materials, while the fabric can be cotton, synthetic fibers, cashmere, fleece, leather, artificial leather, wool, and other materials. The lining of the hat can be made of colored woven fabric, velvet, woolen materials, etc. 　8.1.6 Materials for cap lining straps: cotton, synthetic fibers. 　8.1.7 Materials for hat linings and top strap ties: cotton rope, synthetic fiber rope, or a mixture of cotton and synthetic fiber ropes. 　8.1.8 Material for chin strap: cotton fabric strap or synthetic fiber strap. 　8.2 Shape classification: edgeless, short edge, rolled edge, medium edge, long edge, etc. 　8.3 Classification of work sites: General work and special work. 　8.3.1 Test requirements: See Table 1. 　 　　Note: ① Y denotes safety helmets for general types of work. ② T denotes safety helmets for special types of work. ③ For the test requirements and methods, refer to GB 2812. 9 Technical performance requirements for safety helmets 9.1 Basic technical performance requirements 9.1.1 Impact absorption performance Impact tests shall be conducted using the methods specified in Chapters 3 and 4 of GB 2812, after pre-treatment at low temperatures, high temperatures, and under water spray. The force transmitted to the headform does not exceed 4900 N (500 kgf). 　9.1.2 Puncture resistance Tests shall be conducted in accordance with the provisions in Chapters 3 and 5 of GB 2812. The electrical contact display device does not show any indication, meaning that the steel cone is not in contact with the surface of the die. 　9.2 Special technical performance requirements 9.2.1 Electrical insulation performance Tests shall be conducted in accordance with the provisions in Chapter 6 of GB 2812; the leakage current shall not exceed 1.2 mA. 　9.2.2 Flame retardancy Tests shall be conducted in accordance with the provisions in Chapter 7 of GB 2812, and the after-flame time shall not exceed 5 s. 　9.2.3 Lateral stiffness Tests shall be conducted in accordance with the provisions in Chapter 8 of GB 2812; the maximum deformation shall not exceed 40 mm, and the residual deformation shall not exceed 15 mm. 　9.2.4 Antistatic performance Tests shall be conducted in accordance with the provisions in Chapter 9 of GB 2812; the actually measured surface resistivity shall not exceed 1×10⁹ Ω. 10 Inspection Rules 10.1 Factories that produce safety helmets must pass inspections by **designated inspection agencies and obtain a production license before they can manufacture and sell such helmets. 　10.2 Safety helmets are inspected in batches of 2,000 to 20,000 units upon leaving the factory; if a batch contains less than 2,000 units, it is still considered as one batch. 　10.3 When the factory conducts random inspections based on classification codes, if one sample is found to be defective, additional inspections are carried out; if it remains defective, then the entire batch of products is considered defective. 　10.4 When a factory applies for testing, a test certificate with a classification code is issued based solely on the actual performance achieved. 　10.5 **When the inspection department conducts random checks on factory products, representatives from the provincial or municipal inspection departments or from the factory should be present. When product quality declines, the **inspection department should guide the factory in improving product quality, and has the authority to issue criticism, warnings, or notifications to factories that fail to produce in accordance with standards and experience a drop in product quality. In severe cases, it is recommended that the licensing authority revoke their production license. 11 Procurement, Supervision, and Management 11.1 Procurement of safety helmets: Enterprises must purchase products that come with certification of successful product inspection; such products may be used only after passing inspection. 　11.2 Safety helmets should not be stored in places with acids, alkalis, high temperatures, exposure to sunlight, or humidity; they must also not be kept together with hard objects. 　11.3 Service life of safety helmets: Calculated from the date of completion of product manufacturing. 　　Hats woven from plant branches should not be used for more than two years. 　　Plastic caps and paper-gummed caps should not exceed two and a half years. 　　The rubber cap made of fiberglass-reinforced plastic (vinyl steel) should not last more than three and a half years. 　11.4 In accordance with the provisions of Article 11.3, the enterprise’s safety and technology department shall conduct random tests on safety helmets that have reached their expiration date; they may be used again only if they pass these tests. Subsequent tests shall be carried out once a year, and if the helmets fail such tests, they must be discarded. 　11.5 The competent labor bureaus at the provincial and municipal levels shall supervise expired safety helmets and urge the enterprise’s safety technology departments to conduct inspections; they may only be used after passing such inspections. 12　Markings and Packaging 　12.1　Each safety helmet shall have the following four permanent markings: 　　a. Manufacturer’s name, trademark, model ； 　　b. Manufacturing year, month ； 　　c. Production certificate and verification ； 　　d. Production license number. 　12.2 When packing safety helmets for shipment, each helmet should be wrapped with paper or plastic film as a cushion before being placed in a cardboard box. The safety helmets placed in the boxes must be finished products. 　12.3 The box shall be marked with the product name, quantity, weight, volume, and other relevant notes. 　12.4 Each box of safety helmets must be accompanied by an instruction manual.

As mentioned above, safety helmets have their standards; if safety helmets are not safe, then how can safe working be ensured? You need to purchase safety helmets through legitimate channels