Soda Lime Sight Glass Disc DIN8902

Tempered soda lime glass disc grinded and polished.

According to DIN8902, compressive stress with temperatures up to max.150°C,

without restriction at low temperature area.

Additional information

Material

Soda Lime Glass

Standard

DIN8902

Size

Diameter 10-420mm

Thickness

1-19mm

Edge

Grind or Polish

产品生产工艺

Product Details

Size and Dimentions

Diameter: 10-420mm.

Thickness: 1-19mm

Gerneral Toelrance :

Diameter (D):

up to 150mm: ± 0.5 mm

from 150 to 200mm: ± 0.8 mm

over 200 mm: ± 1.0 mm

Thickness (s):

from 10 to 19 mm:+ 0.5 – 0.25 mm

Flatness (e):

D ≤ 100 mm: 0.05 mm

100 mm < D ≤ 150 mm: 0.08 mm

150 mm < D ≤ 200 mm: 0.12 mm

D > 200 mm: 0.15 mm

Parallelity (p):

D ≤ 100 mm: 0.20 mm

100 mm < D ≤ 200 mm: 0.25 mm

D > 200 mm: 0.30 mm

 

 

Technique Specification

Composition

SiO2 Na2O CaO MgO Al2O3 K2O SO3 Fe2O3
72.6% 13.9% 8.4% 3.9% 1.1% 0.6% 0.2% 0.11%

Physical & Chemical Data

1 Density ρ 2.52g/cm3 @24℃
2 Transmissivity 91%
3 Water resistance ISO0719 III
4 Acid resistance ISO0195 III
5 Alkali resistance ISO0695 III
6 Max Working Pressure @24℃ 35bar (Corrosive medium)
7 Flexural Strength 165/mm2
8 Surface compressive stress 77N/mm2
9 Coefficient of expansion (20-300) ≤8.5*10-6/K
10 Max Working Temperature 150℃
11 Thermal Shock Resistance △T 50K
12 Softening Point 715±10℃
13 Annealing Point 550±10℃

Application

  • Industry, petrol, chemistry and medicine pipe.
  • Used in flange for observing the liquid flow or liquid level

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