Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.
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Safety Helmet Impact, And Puncture Resistance ,Testing, Machine is used for the detection ,of impact, resistant ,helmet, absorbs ,impact test, machine performance and puncture resistance, high degree of automation equipment, easy to operate, is a ,helmet, producers over production licenses and construction quality are recognized qualification essential for an assessment of ,testing, equipment.
Three years hence remove the ,helmet, from use or earlier if the ,helmet, has changed in colour, exhibits any signs of wear, or damage due to ,impact, or deterioration (AS/NZS 1800:1998 3.4). If the sticker has not been used, replace the ,helmet, three years from the manufacture date stamp under the brim or peak of the ,helmet,.
SHARP ,impact, tests. Each model of motorcycle ,helmet, undergoes 30 linear and 2 oblique ,impact, tests in order to achieve a SHARP rating. To complete these 32 tests, a minimum of 7 individual ,helmet, samples, in a range of sizes, are subjected impacts at three speeds (6, 7.5 and 8.5 metres per second) as follows:
55mm long, standard Charpy ,test, specimen is given in Figure-2. If the dimensions of specimens are maintained as indicated in standards, notched-bar ,impact test, results are affected by the lattice type of materials, ,testing, temperature, thermo-mechanical history, chemical composition of materials, degree of strain hardening, etc.
Safety helmet, should withstand the ,impact, of a plumb ball of 500gm weight with conical steel point having an included angle of 36 degree or a spherical point of radius not more than 0.5mm, dropped from a height of 3 meter with pointed end downward onto the top of the crown of the ,helmet, without getting pierced, dented or suffering failure of any integral part.
What is the shelf life of a ,helmet, and what is the expiry date? - According to the Singapore SS 98 standard for industrial ,safety helmet, specification, there is no manditory expiry date.Instead, representative samples from each batch of hats can be tested every 3 years (from the date of first use) to ensure each batch's compliance with SS 98.
For ,impact testing,, the typical ,test, apparatus consists of a rig that drops a helmeted headform in a guided freefall to an anvil on the floor. You strap the ,helmet, on the headform, turn it upside down so the ,helmet, hits the anvil first and drop it onto the anvil. The ,helmet, is oriented before each drop to ,test, it's most vulnerable areas.
29/1/2014, · ,Testing, Methods: 1. ,Impact, Absorption ,Test,: Principle ,Impact, absorption capacity is determined by recording against time the acceleration imparted to a headform fitted with the ,helmet,, when dropped in guided free fail at a specified ,impact, velocity upon a fixed steel anvil. The first ,impact, shall be carried out within 45 seconds of conditioning.
The Charpy ,impact test,, also known as the Charpy V-notch ,test,, is a standardized high strain-rate ,test, which determines the amount of energy absorbed by a material during fracture.Absorbed energy is a measure of the material's notch toughness.It is widely used in industry, since it is easy to prepare and conduct and results can be obtained quickly and cheaply.
The drop tower ,test, is the industry standard for ,helmet testing,. In this ,test,, a twin-wire impactor simulates ,helmet,-to-,helmet impact,. To ,test, the shock absorbency , ,helmets, get taken to a height of 60 inches from the ground, then dropped onto a steel anvil beneath a firm rubber pad at specific velocities, locations and temperatures.