1.Supplied directly from the factory,lowest price 2.Stable supply capacity,500 tons per month 3. Sample for free

1. Manufacturing process

Furnace: Automatic temperature control ,≥1200°c;

There  production lines.

The borosilicate glass product is processing with a advanced production technology  by using the characteristic that  in the condition of high temperature the glass is conductive .The borosilicate glass tube ,its Melting temperature is1680°C,Softening temperature is 830 °C ,Coefficient of thermal expansion is 3.3×10-6K-1 .

  

2.Size

OD: 3 - 230mm ;

Thickness: 1.1 - 11mm;

Length: Depends on different requirments

3.Physical and chemical properties

Mechanical properties
Density	2.23±0.02g/cm³
Mohs scale of hardness	>7

Thermodynamic performance
Coefficient of mean linear thermal expansion	(0-300°C)(3.3±0.1)×106K1
Softening point	820±10°C
Transformation temperature	516±10°C
Specific heat capacity	(20-100°C)0.82KJ×(Kg×K)-1
Thermal conductivity	1.2W×(m×K)-1
Thermal shock resistance	180K
The film thermoelectric performance	100K
Maximum working temperature	Shorttime(<10h)500°C,Longtime(>10h)450°C

Chemical properties
Hydrolytic class	ISO719/DIN12111 HGB1 ISO720	HGA1
Acid class	ISO1776/DIN12116	1
Alkali class	ISO695/DIN52322	A2

Optical properties
Refractive index	Nd:1047384
Transmission rate	>91%

 4.Usage

1. Glass bar:  can be used for processing high-grade decorative lighting supplies

2.Glass tube:  can be used for chemical equipment, chemical pipeline,  tube for crafts

3. Can be used for processing rough tube of  solar vacuum tube

4. Can be used for processing  high-grade daily necessities

5.The package 

 

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borosilicate 3.3 glass tube