Clear Quartz Tube

This is clear fused quartz glass tube available as continuous machine drawn and automatic controlled tubing .this glass has the typical characteriastics of high purity ,good spectral transmission,weellcontrolled dimension and lower OH and so on .it serves as the first choice of heat resistant material for halogen lamps ,mercury lamps ,metal halide lamps and other quartz lamps .this glass can be supplied in the range of 3-80mm outside diameter,0.6-2.0mm wall thickness and 1200-1500mm length. Exhaust tube with good CPK are suiable for highspeed streamline production .and further processing of trim cutting ,fire polishing ,bending and pinchingcan be done according to the requirement of cusomers .OH-content can be controlled within 20ppm/15ppm/10ppm/5ppm/2ppm according to the requirement of customers.
The detailed dimensional tolerance and technical data can be found in table I，table II,table III, tableIV, tableV.


Clear Fused Quartztubing,Quartz tubing standard sizes ：

ID×0D(mm) (mm) 1×3 1.00 1.2×3 0.90 1.6×3 0.70 2×3 0.50 2×4 1.00 2×6 2.00 2.3×3.6 0.60 2.35×3.65 0.65 2.35×4 0.83 2.35×4.35 1.00 3×5 1.00 4×6 1.00 5×7 1.00 6×8 1.00 6×10 2.00 7×9 1.00 7.75×9.75 1.00 7.8×10 1.10 8×10 1.00 8×12 2.00 8.5×10.5 1.00 9×11 1.00 9×11.8 1.40

ID×0D(mm) (mm) 10×12 1.00 10.5×12.75 1.13 11×13 1.00 11.7×14.1 1.20 12×14 1.00 12.75×15 1.13 13×15 1.00 15×17 1.00 15×18 1.50 16×18 1.00 18×20.5 1.25 18×21.6 1.80 19×25 3.00 20×22 1.00 20×22.8 1.40 20×23 1.50 20.2×23 1.40 22×25 1.50 22×25.3 1.65 22×25.8 1.90 23×26 1.50 25×27.5 1.25 25×28 1.50

ID×0D(mm) (mm) 25×28.8 1.00 27×30 1.50 30×33 1.50 32×35 1.50 34×38 2.00 35×38 1.50 37×40 1.50 38×44 3.00 38.1×42.1 2.00 40×43 1.50 42×45 1.50 45×48 1.50 47×50 1.50 48×52 2.00 50×54 2.00 50×55 2.50 53×57 2.00 55×59 2.00 57×61 2.00 60×64 2.00 63×67 2.00 65×69 2.00 66×70 2.00 68×72 2.00 70×80 2.50

Dimensional Tolerance  (table Ⅱ)

Range of OD	OD	WT	Siding	Ellipsticity	Camber/1220mm
≤5mm	±2.0%	±10%	12%	2.0%	2.5mm
6.00-15.00mm	±1.25%	±8%	10%	1.5%	2.5mm
15.00-20.00mm	±1.25%	±10%	15%	1.5%	2.5mm
20.00-25.00mm	±1.25%	±10%	15%	1.5%	3.0mm
25.00-30.00mm	±1.35%	±12%	15%	1.5%	3.0mm
30.00-80.00mm	±1.5%	±14%	15%	2.0%	3.0mm

Chemical Composition  unit: ppm(tableⅢ)

Cr	Ge	Fe	Mg	Ti	Ca	Al	Na	Li	K
0.1	0.4	1.5	0.4	0.1	0.8	16	2.3	0.5	2.0

Lights transmittance(table Ⅳ)

nm	≤220	255	280	315	350	380	590	780
%	89	91	93	93	93	93	93.2	93.4

Physical capability(table V)

	214	219	254
Density（g/cc）	2.2	2.21	2.21
Coefficient of　expansion (cm/cm℃)	5.5×10-7	5.9×10-7	6.7×10-7
Softening point(℃)	1683	1660	1615
Annealning point(℃)	1215	1204	1163
Strain point (℃)	1120	1106	1066
Refraction	1.4585	1.456	1.460
Heat（j/kg0k）	670	700	690
Youngs modulus (pa)	＞1.1×109	0.94×109	0.55×109
Young's modulus (Pa)	7.2×1010	7.5×1010	7×1010
Resistivity（ohm cm@350℃）	7×109	2.5×1010	5×1010
Permittivity （@1MHz）	3.75	5.8	6