Standard Tubing 


This standard quartz lamp tubing is a kind of clear electrically fused machine-drawn tubing. It has characteristics of excellent visual, thermal, mechanical properties with tight dimensional tolerances. This material is available in a full range between 2mm and 200mm outside diameter. The hydroxyl (OH) content can be adjusted to different level according to its application.


The spectral transmission from wavelength about 180-220nm usually reflects material purity for clear fused quartz. The presence of some metallic impurities will make the transmission decrease from wavelength about 180-220nm. As transmission curve illustrate, due to the presence of the higher content of some metallic impurities such as Fe etc., the transmission is from wavelength 185-220nm which encourages the ozone generation is much lower. So this material can not be used for making ozone generation lamps.


However, it still has a transmission of over 85% at wavelength 253.7nm which is ideal for making water purifying lamps and other UV germicidal lamps, because these UV lamps emit about 90% of their radiated energy at 253.7nm which makes the peak germicidal effectives occur.

This has a very good transmission at visible light range from wavelength 380-720nm. So this low cost material is accepted world widely for making halogen lamps, high pressure mercury vapor (HPMV) lamps and other lamps of general lighting system.

The large diameter can also be used in other lower temperature industrial field due to its anti-alkali and anti-acid properties such as chemical industry and lower temperature semiconductor industry etc.

The detailed Application in combination with its different Hydroxyl (OH) content is as follows:

OH Application
OH≤160PPM thermo couple, defrost lamps for refrigerator. halogen lamps for GLS and automobile, water purification and other UV lamps. The large diameter tube can also be used in Chemical and lower temperature semiconductor industry and so on.
OH15PPM quality halogen lamps , low cost HPMV* lamps, low cost MH* lamps.
OH5PPM top quality halogen lamps, quality HPMV lamps, MH lamps
OH2PPM MH lamps.


1.   UB=Unbaked; NB=Normal Baked; EB=Extra Baked; SB=Super Baked; GLS=General Lighting System; HPMV=High Pressure Mercury Vapor; MH=Metal Halide.

2.  Wavelength: Vacuum UV=10-200nm   UV-C = 200-280nm   UV-B
= 280-315nm
UV-A = 315-380nm  Visible Light =380-720nm