A safety helmet is a protective device that protects the head from impact. Consists of a cap shell, a cap liner, a lower cheek strap, and a rear hoop. The cap shell is hemispherical, strong, smooth and resilient, and the impact and puncture kinetic energy of the striking object are mainly carried by the cap shell. There is a space between the cap shell and the cap liner that can buffer and disperse the instantaneous impact force to avoid or reduce direct damage to the head. Impact absorption properties, puncture resistance, lateral rigidity, electrical insulation, and flame retardancy are requirements for the basic technical performance of the helmet.
Miners and underground engineers used to protect the top of the head wearing a shallow dome made of steel or similar raw materials. A lightweight protective helmet usually made of metal or reinforced plastic worn by workers in an industrial production environment. Hats worn by workers during construction or mining to protect the head from falling objects. Generally made of wicker, rattan or plastic.
Classification of safety helmets
The helmet products are divided into two categories according to their use: general operation (Y) helmets and special operations (T) helmets, of which T is divided into five categories: T1 is suitable for workplaces with fire sources; T2 applies to underground, tunnels, underground engineering, logging and other operations; T3 applies to flammable and explosive workplaces; T4 (insulation) applies to live working places; T4 (low temperature) applies to low temperature operations. All kinds of helmets have certain technical performance indicators and scope of application, so the selection should be based on the use of the industry and operating environment to buy the appropriate product.
Consumers can choose the right variety according to their own needs. They must choose helmets according to the industry and operating environment used. For example, the construction industry generally chooses Type Y helmets; in the electric power industry, T4 (insulated) safety helmets should be used for contact with power grids and electrical equipment; T3 type helmets should be selected for operation in flammable and explosive environments. The choice of helmet color is arbitrarily large, generally suitable for light colors or eye-catching colors, such as white, light yellow, etc., can also be selected in accordance with the requirements of relevant regulations, selected in accordance with the principles of security psychology, and selected according to different sectors. According to the workplace and the environment to choose.
All kinds of safety helmet applications 1 FRP helmets: mainly used for metallurgical high-temperature operations, oil drilling and logging, power lines, high-rise construction and construction in cold regions. 2 Polycarbonate plastic safety helmet: It is mainly used for oil field drilling, forest harvesting, power supply lines, construction and other operations. 3 ABS plastic safety helmet: It is mainly used in indoor normal temperature workplaces with high impact strength such as mining and machinery industries. 4 Ultra-high molecular weight polyethylene plastic safety helmets: It can be used in a wide range of applications such as metallurgical chemicals, mining, construction, machinery, electric power, transportation, forestry and geology. 5 Modified polypropylene plastic safety helmets: Mainly used in metallurgy, construction, forestry, power, mining, wells, transportation and other types of work. 6 Tape miners helmets: mainly used in coal mines, underground, tunnels, culverts and other places. When worn, there is no chin strap. 7. Plastic miner's helmet: The performance of the product is the same as that of the colloidal miner's cap, except that the high temperature resistance is higher than that of the collier's miner's cap. 8 Cold-proof helmets: It is applicable to wild and open-air operations personnel in cold areas of China in winter, such as mining, geological drilling, forest cutting, construction and port handling. 9 paper plastic safety helmet: suitable for outdoor operations to prevent solar radiation, sand and rain. 10 Bamboo hard hats: Mainly used in metallurgy, construction, forestry, mining, docks, transportation and other types of work. 11 Other woven helmets: Suitable for use in hot places in the south without fire.
A summary of the use of helmet colors in different industries
The relevant national standards do not make guidelines for the use of hard hat colors. Various industries, systems, and companies have different specifications. For example, there are several typical color specifications: Construction Industry: Wine Red: Leader Red: Technical White: Safety Supervisor: Blue: Electrician or Supervisor Yellow: Other Construction Personnel; State Power System: White: Leadership Blue: Managerial Yellow: Construction Person Red: Alien Petroleum System: White: Manager Yellow: Safety Supervisor Red: operator.
Honeycomb gravel stabilizer gravel grids hdpe geocell is three-dimensional, honeycomb like structures manufactured from high density polyethylene and jointly welded by ultrasonic technics. It is flexible to fold during the transport and installation on construction site. The geocell nets will be filled with soils, granular, cements or other on-site infill materials when stretched into web structures, which has powerful and rigid confinement in the lateral and vertical sides.
1. Cell depth: 50mm,100mm,150mm,200mm,250mm
2. Welding space: 330mm~1600mm
Item |
Height (mm) |
Thickness (mm) | Welding Distance (mm) | Tensile strength of welding points (N/cm) | Tensile strength of connection of cells (N/cm) | Tensile strength at yield of each sheet (Mpa) |
Smooth and Not Perforated |
50≤H≤250 | 1.0~1.2 | 330≤A≤1000 | ≥100 | ≥120 | ≥20 |
Smooth and Perforated |
50≤H≤250 | 1.0~1.2 | 330≤A≤1000 | ≥100 | ≥120 | ≥20 |
Textured and Not Perforated |
50≤H≤250 | 1.5~1.7 | 330≤A≤1000 | ≥100 | ≥120 | ≥20 |
Textured and Perforated |
50≤H≤250 | 1.5~1.7 | 330≤A≤1000 | ≥100 | ≥120 | ≥20 |
Remarks: All technical indexes can be customized, and the other special standards will be carried out by agreement or contact. |
1. with flexible, transport can be folded, construction can be stretched into a network, filled with soil, gravel, concrete and other loose materials, constitute a strong lateral limit and stiffness of the structure.
A hybrid retaining wall to prevent landslides and load loads
Treat half fill and half dig roadbed
Permafrost subgrade
Shandong Jinruixiang Geoetextilel Material Co.,Ltd. is a high-tech enterprise which integrates development, design, production, consultation, construction, domestic and international trade of new earthwork synthetic material. The company was established since 2000 and located in No. 10 Yuanshan Road, High-Tech Development Zone, Laiwu district, Jinan City, Shandong Province, China.
The company has specialized in producing geotechnical material including HDPE geomembrane, LDPE geomembrane, LLDPE geomembrane, EVA waterproof board, Composite Geomembrane, polypropylene geotextile, polyester geotextile, woven geotextile more than 15 years. The products are widely used in the field such as the landfill, pond, mine, garden landscape, water conservancy, highway, railway, oil field, biogas, industry and aquaculture etc.
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Q : Are you a factory or trading company?
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A : Our facoty is located is No.10 Yuanshan Road High-tech Development Zone, Laiwu District, Jinan City China. You can take the plan to Jinan Yaoqiang International Airport, then we can pick you up.
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A : General within 3-7 days after received the deposit.
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A : Yes. We are the gold and assessed supplier on alibaba and has got the factory report by SGS.
HDPE Geocells,Honeycomb HDPE Geocell, HDPE Gravel Grid Stabilizer,Plastic Gravel Grid Stabilizer
Shandong Jinruixiang Geotextile Material Co., Ltd , https://www.jrxgeosynthetics.com