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Product Description

Laboy glass ware are all made of high quality boroslicate glass and annealed at 800 degree Celsius , can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling.

The ground joints are precisely grounded according to US standard.

US Standard Size Joint Will Fit into European Standard Size Joint

Standard Taper Ground Glass Joints are interchangable.For either frosted, presicon-ground standard taper joints (same size),the inner ground surfaces (male joint) make a good seal with the outer(female joint)). The joint size is described by the form A/B. The first number A represents the outer diameter (OD) in millimeters (mm) at the widest point of the inner (male) joint and the second number B represents the length of the joint. For example, a 14/20 joint is 14 mm wide at the top (the widest part) and is 20 mm in longth. The joint has a standard taper 1:10, any two joints (male and female) with the same outside diameter (A)can fit into each other ,no matther how lenght the joints are. For example, a 24/40 (US standard size) joint on a condenser will fit into a 24/29 (European standard size)flask but the ground glass joint will protrude (40 - 29) 11mm into the flask.

Protection of Products in Transit

  1. Check the integrity of the product before packaging.
  2. Bubble wrap tightly around the product.
  3. Fill the space in the packing box with pearl cotton.

Material: Borosilicate Glass(PYREX Glass)

Silicon content gt;80%
Strain and Temperature 520℃
Annealing temperature 800℃
Index of refraction 1.47
Transmittance ≧90%
Elastic modulus E 67KNmm-2
Tensile strength 40-120Nmm-2
Processing temperature(104dpas 1220℃
"td" "span" 0.2 "tr" "td" "span" 2.23g/cm3 "tr" "td" "span" 0.9Jg-1K-1 "tr" "td" "span" (20-100℃)1.2Wm-1K-1 "tr" "td" "span" 1 Level "tr" "td" "span" 1 Level "tr" "td" "span" 2 Level
Coefficient thermal expansion (20-300℃) (3.3±0.1)×10-6/K -1
Poisson's ratio μ
"span" Density(20℃)
"span" Specific heat
"span" Thermal conductivity
"span" Water resistance
"span" Acid resistance
"span" Alkali resistance

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