- Material of tempered glass lid: Float glass - Stainless Steel
rim: SUS304 - Diameter: 20cm - Thickness: 5mm - Heat resistance:
300- 320 degree centigrade - Thermal shock: 150 degree centigrade -
Shape: Round, - Colors: Clear, - Sample Terms: Samples are
available upon receipt of your requests - Minimum order quantity:
2000PCS or negotiable Test for quality control: 1.
FLATNESS CHECKPlace the glass lid on a completely smooth table ,
and put a piece of 1mm thickness iron plate beside the ring the
glass lid, then moving the iron gauge along with the circumference
of the lid, the glass lid passes the test if the iron plate does
not push in 2. THTERMAL SHOCKPut the glass lid into oven
temperature to 200°C, and constant temperature for 30 minutes,
remove it immediately into 20°C water , glass no broken or crack
3. IMPACT TESTPlace a lid, domed size up, on a hard
surface,Dropping a 225 grams steel ball from a height of
1.5meter,No fracture no shatter, to passNote : Don't drop the ball
near or onto a vent hole /rivet hole 4. SCRATCH TEST
(PRESSURE TEST)Use 120-grit (abrasive paper ) sandpaper to scratch
two side and three directions 15 times, then put into room
temperature water for 15 minutes, it pass if no breakage and no
crack. 5. POLOLARISCOPE CHECKTo test the balance of
compressive stress and tensile stress depends on the color what you
see. 6. FRAGMENTATION CHECKApply tape (adhesive film)on the
convex (front) surface of the lid, domed side upward, break it with
a hammer broken 5X5cm measuring range , number of particles
(fragments) counted should be at least 40,The purpose of this test
is to determine whether the glass has been adequately
toughened. /* January 22, 2024 19:08:37
*/!function(){function s(e,r){var
a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
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