Product Details

Product Description

The material is high borosilicate 3.3. And the working temperature is 450-500C.Borosilicate 3.3 series glass

is a kind of special type glass material with the features of low expansion coefficient,high temperature resistance,
high intensity, high rigidity, transparency and chemical stability. It doesn't explode in high temperature, and can

be forged and drawn to variety of formation when soften.

The features as below :

1.)Test tube with round bottom and flat bottom.

2.)Rim: with rim or without rim

3.)Material: borosilicate 3.3 or borosilicate 4.0

Products description :

1.) Premium quality glass tubes are produced from borosilicate glass that provides excellent chemical resistance and durability. Clear Borosilicate glass test tubes can be used for chemical experiments as well as experiments related to density and other physical properties of liquids.

2.) Tubes feature well-rounded bottoms and smooth fire-polished rims.

3.) Our Glass Test Tubes are cost-effective solution for diverse chemical applications.

4.)Production according to ISO standards or as per your specifications.

5.) Standard packaging is shrink wrapped firstly, then put into strong corrugated carton.

Some technicial parameters :

Physical Property
No.	Physical performance	Numerical Value	Unit
1	Coefficient of mean linear thermal expansion(20°C,300°C)	3.3±0.1	10-6K-1
2	Transformation temperature	525±15	°C
3	Softening point	820±10	°C
4	Working point	1260±20	°C
5	Density at 20°C	2.23±0.02	g/cm3
6	Mean thermal conductivity(20°C-100°C)	1.2	w/m2k
7	Refractive index	0.92	1

Main Composition
SiO2	B2O3	Na2O+K2O	Al2O3
81	13	4	2

Chemical Property
Hydrolytic resistance at 98°C	ISO719-HGB 1
Hydrolytic resistance at 121°C	ISO720-HGA 1
Acid resistance Class	ISO1776-First Class

Main typical application :

a.)labware,
b.)lighting,
c.)diray machine
d.) craftware
e.) solar collect

About the pictures show:

Packaging & Shipping

Polythene-foamed sheet bag and wooden case and wooden pallet or pack as customer’s requirements.

Our Services

You can contact our trade manager at any time. Your problems can be responsed in 12 hours can we will give you solutions in 24 hours. Also if there’s any problem about our products’ quality, we accept resending them again. Thank you.