How to read the production date of a helmet

Identify the validity period of a helmet:

Each helmet should have four permanent marks: manufacturer name, Trademark, model; year and month of manufacture; production certificate and inspection certificate; production license number. The mark of the year and month of manufacture of the helmet is quite special. There are two number wheels on the inside of the brim. One of them is a growth ring with an arrow pointing to a certain year. The other is the moon wheel, the arrow points to a certain month, and the combination is the year and month of production.

Extended information:

Precautions for using safety helmets:

1. Before use, check the appearance of the safety helmet for cracks, scratches, and unevenness. , wear, whether the cap lining is complete, and whether the structure of the cap lining is in normal condition. If there are obvious defects on the helmet that affect its performance, scrap it in time to avoid affecting the protective effect.

2. Users cannot remove or add accessories to the helmet at will, so as not to affect its original protective performance.

3. Users cannot adjust the size of the helmet lining at will, which will directly affect the protective performance of the helmet. Once a falling object impact occurs, the helmet will come off due to insufficient wear or hit the top directly after the impact. Harm the wearer.

4. The wearer must wear the helmet correctly and firmly when using it, and cannot shake it. The chin strap must be tightened, and the rear hoop must be adjusted to prevent the helmet from falling off.

5. Do not drill holes in the helmet without permission, do not bump the helmet at will, and do not use the helmet as a bench to avoid affecting its strength.

6. Safety helmets that have withstood an impact or been tested should be discarded and cannot be used again.

7. Safety helmets cannot be stored in environments contaminated by acids, alkalis or chemical reagents, and cannot be placed in places with high temperatures, sunlight or humidity to avoid aging and deterioration

8. You should pay attention to using safety helmets within the validity period. Safety helmets woven from plant branches are valid for 2 years, plastic safety helmets are valid for 2 and a half years, fiberglass and plastic safety helmets are valid for 3 and a half years, and those that exceed the validity period Safety helmets should be discarded.

Hard hat production date chart

The technical requirement for hard hats is GB2811. Generally, the LA mark is required. The production date is usually printed on the inside of the helmet, whether it is square or square. There will be some small dots in the circle. The last dot is mainly the production date. This is a mold. Add one dot in which month it was produced.

Impact absorption performance: According to the prescribed method, the impact test is carried out after high temperature, low temperature, water immersion and irradiation pre-treatment. The force transmitted to the head mold shall not exceed 4900N; no fragments of the cap shell shall fall off.

Puncture resistance: Perform puncture test after high temperature, low temperature, water immersion and irradiation pretreatment according to the prescribed method. The steel cone does not contact the surface of the head mold; no fragments of the cap shell should fall off.

Technical requirements:

The hat hoop can be adjusted according to the applicable scope.

The forehead area of ??the hatband should be sweat-absorbent or have a sweat-absorbent band, the width of which is greater than or equal to the width of the hatband.

The laces should be made of soft textile fabric, with a width of not less than 10mm or a rope with a diameter of not less than 5mm.

Toxic and harmful materials must not be used, and materials that come into contact with human body parts must not cause allergic irritation or damage to the skin.

The aging resistance of the material should not be lower than the date indicated on the product label. The performance of a helmet in normal use should not be lower than the standard due to material reasons during the period of use. All materials used should have the same expected life.

Hard hat accessories must not undermine the stability of the helmet when worn normally.

Illustration of the production date of the helmet

There are two number wheels on the inside of the brim. One of them is a growth ring with an arrow pointing to a certain year. The other is the moon wheel, and the arrow points to a certain month. The combination is the year and month of production.

The safety helmet has the following four permanent marks: manufacturer name, trademark, model; year and month of manufacture; production certificate and verification; production license number.

The validity period of the helmet: calculated from the date the product is manufactured. Among them, plant branch woven caps should not exceed two years; plastic caps and paper and rubber caps should not exceed two and a half years; fiberglass rubber caps should not exceed three and a half years.

Extended information:

A safety helmet is composed of three parts: a hat shell, a hat lining and a chin strap.

Hat shell: This is the main component of the helmet, generally using an oval or hemispherical thin shell structure. A certain amount of pressure deformation will occur under the impact pressure. Due to the rigidity of the material, which absorbs and disperses the force, and the smooth surface and round curve, the impact object can easily slide away, thus reducing the impact time. According to the needs and the strength of the helmet shell, the shell can be made into various types such as bare top, top rib, edged and edgeless.

Cap lining: Cap lining is the general term for the parts in the hat shell that are in direct contact with the top of the wearer's head. It consists of a hat hoop ring, a top strap, a protective belt, a support strap, a sweat-absorbent band, and a padding technology. Composed of ropes, etc. The material of the hat lining can be made of cotton webbing, synthetic fiber tape and plastic lining tape. The hat hoop is an annular band that tightly surrounds the person's head when worn. The forehead part of the band is lined with sweat-absorbing material, which has a certain sweat-absorbing effect. .

The hat hoop annular belt can be divided into two types: fixed belt and adjustable belt. The hat hoop is available with a back collar and without a back collar. The top band is a lining band that is in contact with the top of the human head. The top band and the hat shell can be connected with rivets, or the socket of the band is connected to the socket of the hat shell. The top band is in the shape of a cross or six strips. There are 4 to 6 sockets correspondingly.

Chin strap: A strap that is fastened to the chin and plays the role of fixing the helmet. The chin strap consists of a strap and a locking card. A hood without a back collar uses a "y" shaped chin strap.

Reference: Baidu Encyclopedia - Safety Hat Standards

Where to check the validity period of safety helmets

Each safety helmet should have the following four permanent marks: Manufacturing Factory name, trademark, model; year and month of manufacture; production certificate and verification; production license number.

There are 2 number wheels on the inside of the hat brim. One of them is a growth ring with an arrow pointing to a certain year. The other is the moon wheel, and the arrow points to a certain month. The combination is the year and month of production.

The validity period of the helmet: calculated from the date the product is manufactured. Among them, plant branch woven caps should not exceed two years; plastic caps and paper and rubber caps should not exceed two and a half years; fiberglass rubber caps should not exceed three and a half years.

A safety helmet is a shallow dome hat made of steel or similar materials worn to protect the top of the head. It is a protective equipment to prevent impact objects from damaging the head. It consists of a hat shell, a hat lining, a lower cheek strap and a rear hoop. The cap shell is hemispherical, strong, smooth and has a certain elasticity. The impact and puncture kinetic energy of the striking object are mainly borne by the cap shell. There is a certain space between the cap shell and the cap lining, which can buffer and disperse the instantaneous impact force, thereby avoiding or reducing direct damage to the head. Impact absorbency, puncture resistance, lateral rigidity, electrical insulation, and flame retardancy are the basic technical performance requirements for safety helmets.