9
TEST TUBES
N
EUTRAL
G
LASS
TEST TUBES SAMCO ‘50’
SAMCO neutral glass test tubes will withstand
moderate temperature change, they should not be
taken from cold and placed directly into the
hottest part of the flamewithout pre-heating.
Durham Tubes
*
Code
Size
Wall thickness Quantity
mm
mm
per pack
G011/21
25 x 6.5 0.65
250
G011/22
30 x 6.5 0.65
250
G011/23
35 x 7.5 0.65
250
G011/24
50 x 7.5 0.65
250
Test Tubes
*
Light wall with rim
Code
Size
Wall thickness Quantity
mm
mm
per pack
G020/31
75 x 10 0.8
100
G020/32
75 x 12 0.8
100
G020/33
100 x 12 0.8
100
G020/34
100 x 16 0.8
100
G020/35
125 x 16 0.8
100
G020/36
150 x 16 0.8
100
G020/37
150 x 18 0.8
100
G020/38
150 x 24 0.8
50
Test Tubes
*
Light wall rimless
Code
Size
Wall
Quantity
mm
Thicknessmm per pack
G021/31
75 x 10 0.8
100
G021/32
75 x 12 0.8
100
G021/33
100 x 12 0.8
100
G021/34
100 x 16 0.8
100
G021/35
125 x 16 0.8
100
G021/36
150 x 16 0.8
100
G021/37
150 x 18 0.8
100
G021/38
150 x 24 0.8
50
*Supplementary sizes to ISO4142
Physical Properties
Composition
Coefficient of expansion 54 x 10
-7
SiO
2
71
(0-300°C)
AI
2
O
3
7
Density
2.37 B
2
O
3
11
Softening point
770°C CaO 1
Annealing point
560°C BaO 2
Working point
1160°C Na
2
O 6
K
2
O 1
Test Tubes
Mediumwall with rim
Code
Size
Wall thickness Quantity
mm
mm
per pack
G022/31
75 x 10 1.0
100
G022/32
75 x 12 1.0
100
G022/33
100 x 12 1.0
100
G022/34
100 x 16 1.2
100
G022/35
125 x 16 1.2
100
G022/36
150 x 16 1.2
100
G022/38
150 x 18 1.2
100
G022/40
150 x 24 1.2
50
Test Tubes
Mediumwall rimless
Code
Size
Wall thickness Quantity
mm
mm
per pack
G023/31
75 x 10 1.0
100
G023/32
75 x 12 1.0
100
G023/33
100 x 12 1.0
100
G023/34
100 x 16 1.2
100
G023/35
125 x 16 1.2
100
G023/36
150 x 16 1.2
100
G023/38
150 x 18 1.2
100
G023/40
150 x 24 1.2
50
They have good chemical resistance and are
suitable for usewith samples which are
susceptible to pH change.
Tolerances are as specified in ISO4142:2002 (Table 3).
