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Boro 3.3 Glass Tube

Min. Order / Reference FOB Price
1 Ton	US $1000.00/ Ton

Local Area:	Jinan, Shandong, China
R&D Capacity:	OEM, ODM, Other
Payment Terms:	LC, T/T, PayPal

Condition:	New
Type:	Double Vacuum Heating Tube
Certification:	API, ISO, CB, CE

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Product Description

transparent borosilicate glass tubing, pyrex glass tube
Physical performance
Coefficient of mean linear thermal expansion(20,300) 3.3±0.1 10-6K-1
Transformation temperature 525±15
Softening point 820±10
Working point 1260±20
Density at 20 2.23±0.02g/cm3
Mean thermal conductivity(20-100) 1.2w/m2k
Refractive index 0.92
Main Composition
SiO2 81
B2O3 13
Na2O+K2O 4
Al2O3 2
Chemical Property
Hydrolytic resistance at 98 ISO719-HGB 1
Hydrolytic resistance at 121 ISO720-HGA 1
Acid resistance Class ISO1776-First Class