milky and translucent quartz glass tube

The first manufacturer has been producing Opaque Quartz Glass Tube in China .It has no any harmful radiation, and it is characte
It serves as material of infrared heating for heaters, micro-wave oven, electrical baking over, sterilization container and other consumptive and industrial infrared application.
1.Chemical Compositions
unit: ppm
Al
Ca
Fe
Cu
Mg
Mn
4.2
1.53
0.6
0.02
0.157
0.01
2. Physics Properties
Purity (Sio2)
99.82
Density 20 Kg.m3(×103)
2.06-2.148
Shock Resistance KG/CM2
0.85
Softening Point
1600±40
Annealing Point
1120±25
Strain Point
1025±25
Hardness MohS
5-6
Dispute Pressure Intension Mpa
41348130
Inductivity Kv/MM
3.5
Resistance
10 (20)
3. Detailed Specifications and Technology Standards
The Out-diameter deviation of the Opaque quartz glass tube should not be over the stipulations in Table 1
Range of Out-Diameter
8≤φ≤16
17≤φ≤25
26≤φ≤35
φ≥36
Out-Diameter Deviation
±0.30
±0.50
±0.70
±1.00
Note:
1. the tubes, with both end open and one end open, are available. The Out-diameter of the dome end, if so, should not be over the Out-diameter of the tube.
2. For the tubes with special dimensions, it needs to be discussed by the both sides of supplier and customer.
The Wall Thickness deviation of the Opaque quartz glass tubes should not be over the stipulations in Table 2
Range of Wall thickness
0.8~1.5
1.6~3.0
≥3.1
Deviation of Wall Thickness
±0.10
0.20
0.30
Note:
1. The tubes, with both end open and one end open, are available. The wall thickness of the dome end, if so, should not be less than three-fourth of the wall thickness of the tube.
2. For the tubes with special dimensions, it needs to be discussed by the both sides of supplier and customer.
he other requirements to the Opaque quartz glass tubes should be in accordance with the stipulations in Table 3
Elliptcity
Not over the absolute value of OD deviation
Length
Decided by the supplier and customer, however the tolerance should not be over ±1mm
Deviation of Wall Thickness
Not over the absolute value of wall thickness deviation
Angularity
Not over 3% of the tube length
Surface Dirties
There must not be dirties on the inner surface. Without any obvious finger prints. Without obvious adhered materials caused when cutting; within the range of 300mm, obvious concentrated area of water marks cause when cutting should not be more than one; within the range of 300mm, the inner dirty area and small dirty pits should not be over 2mm.
Scuffings and Nicks
The total axial-direction scuffing length should not be over two times of the total length of the tube; and the total round scuffing length should not be over two times of the circumference of the tube. The length of the nick should not be over 12.5mm within the range of 300mm, and the nick length should not be over the circumference of the tube.