We have in stock for our clients a comprehensive range of Borosilicate Glass Tubing which is manufactured using high grade borosilicate glass. Owing to the quality of the glass, these tubing are resistant to heat and crack. Though these are available in various dimensions and sizes

“Extra-hard” borosilicate glass

For visual control of chemical and physical processes.

The quality of a sight glass depends mainly on the chemical composition and mechanical strength of the glass material. Uniform glass quality is maintained through glass analyses and acid / alkali tests . The mechanical strength is attained throught themal pre-stressing . In this procedure the sight glass is brought to a high temperature then quickly cooled – rather as in the hardening of steel . This increases the bending strength and shock resistance of the glass to the values stipulated in the standard. Optical control of the pre-stressing is carried out with the aid of a polarization filter : the stress lines are made visible at the edge of the sight glass as interference colours . Glass which has not been thermally prestressed shows no stressed shows no stress lines and has much lower mechanical strength.