For heavy wall :
44*4.0, 19*2.4, 28*4.0, 32*4.0,
32*4.0, 32*3.2, 38*3.8, 38*4.0,
51*4.0, 38*3.2, 51*4.8, 51*4.8,
44*4.0, 38*4.0,51*4.8
For light wall :
10*1.5, 12*2.2, 13*1.8, 16*1.2,
7*1.5, 8*1.5, 9*2.0, 10*1.5,
12*2.0, 12*2.2, 18*1.8, 9*2.0
2.Main Composition
a) SiO2: 80±0.5%
b) B2O3:13±0.2%
c) Al2O3:2.4±0.2%
d) Na2O(+K2O):4.3±0.2%
3.Physical and Chemical Properties
a) Coefficient of mean linear thermal expansion(20/300℃):3.3±0.1(10-6K-1)
b) Transformation temperature: 525±15℃
c) Melting point::1,260±20℃
d) Softening point:820±10℃
e) Density at 20℃:2.23g/cm2
f) Hydrolytic resistance at 98℃: ISO719-HGB1
g) Hydrolytic resistance at 121℃: ISO720-HGA1
h) Acid resistance class:ISO1776-1
i) Alkali resistance class:ISO695-A2