Share on:
Wholesale heat resistant 3.3 glass borosilicate colored tube
1.Main composition
SiO2 | B2O3 | Al2O3 | Na2O+K2O |
80±0.5% | 13±0.2% | 2.4±0.2% | 4.3±0.2% |
2.Physical and chemical properties
Coefficient of mean linear themal expansion(20°C/300°C) | 3.3±0.1(10–6K–1) |
Softening point | 820±10°C |
Melting point | 1260±20°C |
Transformation temperature | 525±15°C |
Hydrolytic resistance at 98°C | ISO719-HGB1 |
Hydrolytic resistance at 121°C | ISO720-HGA1 |
Acid resistance class | ISO1776-1 |
Alkali resistance class | ISO695-A2 |
1.Q:Are you factory or trading company ?
A:We are a trading company, and we have a long-term cooperation factory in Huailai.
2.Q:Where is your factory and trading office located ?How can I visit there ?
A:Our factory is located in Huailai county,Hebei Province,China,about 2hours from Beijing Capital International Airport.
Our trading office is located in Hongjunying South Rd,Chaoyang District,Beijing 100107,China.About half an hour from Beijing Capital International Airport
3.Q:What is the main products of your company?
A:We mainly produce:borosilicate galss tubing ,borosilicate gass rod ,and borosilicate glassware.
4.Q:How can I get some samples?
A:We are honored to offer you samples ,length about 20cm is free .Customers should pay for the shipping freight.
5.Q:How does your factory do regarding quality control ?
A:Quality first is our motto ,Workers always attach great importance to quality controlling from the very beginning to the very end .