Who is still complying with national standards for safety helmets (GB 2811-89)

The poor quality of the helmet and the top 8 yuan become the top hat of the construction personnel.

Details determine the success or failure of connecting helmets to unqualified manufacturers

Anhui Minsheng Industry & Trade Group safety helmet is not safe

Very thin and brittle, it breaks the helmet hanging on some construction sites!

Too many reports, too many accidents make us sad, the China Safety Protection Network is still here to remind all helmet manufacturers should still abide by the rules of the game:

Hard hat national standard GB 2811-89

1 Theme content and scope of application

This standard specifies the physical performance requirements, technical performance requirements and inspection rules, management, signs and packaging for industrially used safety helmets.

This standard applies to helmets commonly used in the industry, and other special features are only applicable to the corresponding special places.

2 reference standards

GB 1410 solid electrical insulating materials, insulation resistance, volume resistivity and surface resistivity test method

GB 2812 helmet test method

3 Terms

3.1 Hard Hat

The protective cap on the human head which is protected by external forces. It consists of a cap shell, a cap liner, a chin strap, and a rear hoop.

3.1.1 Caps

The helmet caps include caps, brims, top ribs, vents, sockets, plugs, and chins with pedestal and hangers.

a. The visor: the part of the front of the cap shell;

b. brim: the portion of the cap shell that extends around the outside of the cap;

c. top ribs: the portion used to reinforce the top of the cap shell;

d. Breathable holes: open pores on the cap;

e. Socket: the insert structure connecting the cap shell with the cap liner and accessories;

f. Connection hole: The opening of the connection cap and cap shell.

3.1.2 Cap lining: The general name of the internal components of the cap. Includes the top band of the hoop, the guard band, the support band, the sweat absorption band, the gasket and the tether, etc.

a. Cap hoop: a fixed band around the circumference of the head;

b. Trousers: straps that are in direct contact with the top of the head;

c. Guard band: An additional layer of top strap is attached to the top of the band to act as a buffer;

d. Tether (belt): The cord (band) that connects the care belt and guard band, cap liner and cap shell;

e.Sweat-absorbing tape: belt-shaped sweat-absorbent material wrapped around the cap hoop;

f. Pad: a cushion that acts as a cushion between the cap and the cap;

g. Rear hoop: Adjustable hoop on the rear of the cap hoop;

h. Cap lining connector: Connector to connect the cap liner and cap shell.

3.1.3 The chin strap: The strap attached to the pimple.

3.1.4 locking card: adjust the jaw with a long clip.

3.1.5 Plug-in: The cap shell and the cap lining are inserted and connected.

3.1.6 Bolting: The cap shell and the cap liner are connected by a tether.

3.1.7 Riveting: Caps and caps are riveted together.

State Bureau of Technical Supervision 1989-12-01 Approved 1990-08-01 Implementation of GB 2811-89 3.2 Horizontal Spacing: The distance between the cap hoop and any horizontal point of the space around the cap when the helmet is worn.

3.3 Vertical distance: The vertical distance between the top of the helmet and the top of the cap when the helmet is worn (excluding the top rib space).

3.4 Wearing height: The vertical distance from the bottom edge of the hoop to the top of the head when the helmet is worn.

3.5 Head mold: The head model used when testing helmets (see Appendix A).

4 structural requirements

4.1 The top of the cap should be strengthened. It can be made into a light top or a ribbed structure. The cap is made without edge, with edge or edge.

4.2 The plastic cap lining should be made with a rear hoop structure that can be freely adjusted in size.

4.3 The chin strap with no rear hoop lining is made of "Y" type, with a rear hoop, allowing a single root.

4.4 Contact head The headband of the forehead should be breathable and absorb sweat.

4.5 The gasket around the hoop, can be made into a bar, or block, and leave space for air circulation.

5 size requirements

5.1 Inside the shell

a. Length: 195--250mm;

b. Width: 170--220mm;

c. High: 120--150mm.

5.2 Cap tongue: 10-70mm.

5.3 brim: 0--70mm, down slope of 0 ° - 60 °.

5.4 Ventilation Porosity: Perforations on the cap shell with a total area of ​​not less than 400 mm2. Special applications are not subject to this limitation.

5.5 Hat clips:

The following three numbers

No. 1: 610--660mm;

No.2: 570--600mm;

No. 3: 510--560mm.

Cap hoop, can be made separately, but also can be used universally.

5.6 vertical spacing

a. Plastic lining: 25--50mm;

b. Cotton or chemical fiber tape: 30--50mm.

5.7 Wearing height: 80--90mm.

5.8 horizontal spacing: 5 - 20mm.

5.9 The height of the protrusions around the cap should not exceed 6mm, and there should be a cushion around the protrusions.

6 colors

Generally suitable for light or eye-catching colors, such as white, light yellow and so on.

7 weight

a. Small edge, curling helmet does not exceed 430g (not including accessories);

b. The length of the helmet is no more than 460g (not including accessories);

c. Cold-proof cap does not exceed 690g (not including accessories).

8 categories

Various 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 major categories of thermoplastic materials and thermosetting materials. They are mainly used to make hard hat caps, cap linings, etc., and to make cap hoop materials, when adding other plasticizers, colorants, etc. Pay attention to whether these ingredients are toxic and do not cause skin irritation or inflammation.

Applied in plastic caps used in coal mine gas mines should be added antistatic agent.

Thermosetting materials can be mixed with glass fiber and vinylon.

8.1.2 Rubber: Like natural rubber and synthetic rubber, rubber and rubber should not be used.

8.1.3 Paper Glue: Paper Glue is prepared with wood pulp and other raw materials.

8.1.4 Plant material: The plant material is rattan, willow, bamboo.

8.1.5 Cold-proof cap materials: The cold-proof cap shell can be made of engineering plastics, plant materials, fabrics available cotton, chemical fiber products, sheep shearing, plush, leather, artificial leather, wool, etc. Cap lining available color weaving, velvet, Wool and so on.

8.1.6 cap liner with materials: cotton, chemical fiber.

8.1.7 Cap liner and top strap rope material: cotton rope, chemical fiber rope or cotton, chemical fiber mixed rope.

8.1.8 Lower jaw with materials: cotton or chemical fiber tape.

8.2 Shape classification: no edge, small edge, curling, mid-edge, large edge, etc.

8.3 Workplace classification: general operations and special operations.

8.3.1 Test Requirements: See Table 1.

Note: 1Y represents the general operation class of the helmet.

2T represents a special operating class helmet.

3 Test requirements and methods are detailed in GB 2812.

9 Hard hat technical performance requirements

9.1 Basic Technical Performance Requirements

9.1.1 Impact absorption performance

According to the methods specified in GB 2812 Chapter 3 and Chapter 4, the impact test is conducted after pretreatment with low temperature, high temperature, and water spray. The force transmitted to the head mold does not exceed 4900N (500kgf).

9.1.2 Puncture resistance

Tests are carried out in accordance with the provisions of GB 2812 Chapters 3 and 5. The electrical contact display device is not shown, ie the steel cone does not touch the surface of the head mold.

9.2 Special Technical Performance Requirements

9.2.1 Electrical insulation performance

Tested in accordance with the provisions of GB 2812 Chapter 6, leakage current does not exceed 1.2mA.

9.2.2 Flame Retardant Performance

Tested in accordance with the provisions of GB 2812 Chapter 7, the continued burning time does not exceed 5s.

9.2.3 Lateral rigidity

Test in accordance with the provisions of GB 2812 Chapter 8, the maximum deformation of no more than 40mm, the residual deformation does not exceed 15mm.

9.2.4 Antistatic properties

Tested in accordance with the provisions of GB 2812 Chapter 9, the actual measured surface resistivity is not greater than 1 × 109Ω.

10 inspection rules

10.1 The factory producing safety helmets must be inspected by the inspection department designated by the state, and only after obtaining a production license can it be produced and sold.

10.2 helmet factory by batch 2000-20000 top sampling inspection, a batch of less than 2,000 top is still calculated in batches.

10.3 When the factory conducts random inspection according to the classification number, there is one unqualified and double sampling inspection. If it still fails, the batch of products fails.

10.4 When the factory applies for a test, the test certificate of the classification number is only based on the performance actually achieved.

10.5 When the national inspection department tests factory products, it shall have the provincial or municipal inspection department or factory representatives to participate. When the product quality is reduced, the national inspection department shall guide the factory to improve the product quality. For factories that do not follow the standard production, the quality of the products declines. Criticism, warning, notification. Severely, the issuing department may be revoked for the production license.

11 Procurement, Supervision and Management

11.1 Procurement of Hard Hats: The company must purchase products with product inspection certificates, and the purchased products must be used after they are received.

11.2 Safety helmets should not be stored in places such as acids, alkalis, high temperatures, sun exposure, and humidity, but should not be placed together with hard objects.

11.3 The period of use of the helmet: calculated from the day the product is manufactured.

Plant woven knit caps for no more than two years.

Plastic caps, paper caps do not exceed two and a half years.

Fiberglass (vinyllon steel) rubber caps do not exceed three and a half years.

11.4 The company's safety and security departments shall perform spot checks on the helmets that expire according to the provisions of Article 11.3, and they can continue to use them only after they are qualified. They will be tested once a year, and the batch of helmets will be scrapped if they fail to pass the inspection.

11.5 The competent department of the provincial and municipal labor bureau shall supervise and urge the safety and technical department of the enterprise to check the safety helmets that have expired.

12 signs and packaging

12.1 Each top helmet shall have the following four permanent signs:

a. Manufacturer's name, trademark, model number;

b. Manufacturing year, month;

c. Production certificate and verification;

d. Production license number.

12.2 When the hard hat is shipped from the factory, each top cap should be wrapped with paper or plastic film and then placed in a cardboard box. The hard hat that is installed in the box must be a finished product.

12.3 The box should be marked with the product name, quantity, weight, volume and other precautions.

12.4 Every box of hard hats must be attached to instructions.