本公司生产的电光源及电真空仪表用透明石英玻璃管，对于其他要求耐高温、高热稳定性、高 化学稳定性、 高介电性能的工业技术部门亦得

到广泛的应用。 下述五类本公司均具有相应的生产线。

a. 电加热连熔石英玻璃管(连熔管)；

b．真空加压法石英玻璃管(加压管)；

c．气炼电熔二步法石英玻璃管(气炼二步法管)：

d．电熔二步法石英玻璃管(电熔二步法管)；

e．渗钛无臭氧石英玻璃管(无臭氧管)。

产品按规格尺寸、外观指标、化学纯度及羟基含量(部标准JC／T598-1995)分为： 优等品(A级)，一等品(B级)，合格品(C级)三个等级

　　The transparent quartz glass tubes for 1ight source and vacuum instruments produced in our company are also widely used in other industry，technicai fields，where properties of high temperature proof，thermal stability，high chemical stability，high dielectric are needed．
We have production 1ines for the following 5 products：
a．Electric—heated continuously melting quartz glass tubes；
b．Vacuum pressure quartz glass tubes；
C．Two steps gas melting and electric-meltlng quartz glass tubes；
d．Two steps electric-meltlng quartz glass tubes；
e．Titaniferous ozon—free quartz glass tubes．
According to size，outward appearance，chemical purlty and hydroxyl content (Ministry standard JC／T598-1995)products are divided into：
High-class(Class A)，first Class(class B)，and qualified products(Class C)．S

Chemical purity 化学纯度

*No hydroxyl content requirements for products except gas discharge lamps.

*羟基含量指标适用于气体放电灯，其他使用场合一般不作要求。

Size and to1erance of tubes管子的规格尺寸及偏差

*用户可以根据需要，供应特殊厚壁产品。

椭圆度：不超过外径偏差的绝对值。

偏壁度：不超过壁厚偏差的绝对值。

弯曲度：不超过管长的3 ‰ 。

长度偏差：±1mm。

Special wall thickness products can be available according to the user's requirement．
Ellipticitv is no more than absolute value of the outside diameter toleragce．
Wall thickness deviation is no more than absohte value of the wall thickness telerance．
Bending is no longer than 3 ‰ of the tube Length．
Length telerance：±1mm．