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BOROSILICATE TEMPERED GLASS PANES TYPE B - ISPESL M.15.C AND CTI ADVISE

Borosilicate Tempered Glass Panes Type B

The ISPESL M.15.C standard applies to pressure resistant circular panes for sight glasses made of thermally toughened borosilicate glass, which are designed to withstand a continuous one-sided fluid pressure at temperature between -200°C and 280°C.
Borosilicate Tempered Glass Panes Type B

Technical Specifications

• Minimal flexural fracture stress: 160 N/mm2
• Allowable continuous working temperature: 72,15≤T≤553,15 K
• Thermal shock resistance (ISO 718): 230°C
• Hydrolytic resistance (ISO 719): class HGB 1
• Acid resistance (ISO 1776): ≤ 100µg Na2O per 100 cm2
• Alkaline resistance (ISO 695): class A2
• Coefficiente di dilatazione termica lineare: α≤5.0±0.1*10-6K-1 (293.15÷573.15 K)


M.15.C Type B Standard Panes

Diameter d1(mm)
Diameter d2(mm)
Working pressure (bar)
8
10
16
25
40
50
Thickness (mm)
45
32
-
-
-
-
10
12
50
35
-
-
-
10
12
-
60
45
-
-
10
12
15
-
63
48
-
-
10
12
15
-
80
65
-
-
12
15
20
-
100
80
-
-
15
20
25
-
125
100
-
15
20
25
30
-
150
125
-
20
25
30
-
-
175
150
-
20
30
-
-
-
200
175
20
25
30
-
-
-
250
225
25
30
-
-
-
-

Non standard panes available on request


Resistance to Chemical Attack

Borosilicate Tempered Glass Panes Type B
a) loss in mass (mm)
b) time (months)

Geometrical Tolerance

diameter up to 150 mm ± 0,5 mm
from 150 to 200 mm ± 0,8 mm
over 200 mm ± 1,0 mm
thickness from 10 to 20 mm + 0,5 - 0,25 mm
over 20 mm + 0,8 - 0,4 mm