Boro 3.3 Glass Tube

• Customization: Available
• After-sales Service: Long Term
• Warranty: Long Term
• Model NO.: HHLB
• Type: Fireproof Glass, Double Vacuum Heating Tube
• Structure: Solid
• Moh′s Hardness: 7
• Shape: Plate
• Function: Thermal Function
• Transparency: Transparent
• Processing Method: Poling Process
• Preparation Process: Floated
• Color: Clear
• Usage: Furniture, Building, Window, Fireplace
• Application: Daily Products, Water Heater, Solar Thermal, Air Conditioning System
• Condition: New
• Certification: API, ISO, CB, CE
• Pipe Material: Glass
• Pressurized: Pressurized
• Item: Transparent Borosilicate Glass Tubing, Pyrex Glass
• Process: Cut, Polish, Ground, Printing
• Use: Lab Glassware, Gift/Craft, Home Decoration
• Size: Diameter From 20-300mm
• Length: up to 4000mm
• Samples: Available Within One Week
• Packing: Carton+Pallet
• Payment: T/T, L/C at Sight
• Delivery Time: 20 Days
• Factory: Shandong
• Transport Package: Carton, Pallet
• Specification: OD4mm to OD315mm
• Trademark: HONHAI
• Origin: Shandong China
• HS Code: 70023200
• Production Capacity: 50 Tons/Day

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