DURAN is a brand name for the internationally defined

borosilicate glass Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10−6 K−1 at 20 °C), m ...

3.3 (DIN ISO 3585) produced by the German compan
DURAN Group GmbH
since 2005 under license from the

Schott AG Schott AG is a German multinational glass company specializing in the manufacture of glass and glass-ceramics. Headquartered in Mainz, Germany, it is owned by the Carl Zeiss Foundation. The company's founder and namesake, Otto Schott, is cre ...

, which was the first to develop it, and which sold it from 1893 until the

equity carve-out Equity carve-out (ECO), also known as a ''split-off IPO'' or a ''partial spin-off'', is a type of corporate reorganization, in which a company creates a new subsidiary and subsequently IPOs it, while retaining management control. Only part of th ...

of the DURAN Group in 2005. Because of its high resistance to heat and temperature changes, as well as its high mechanical strength and low coefficient of thermal expansion, DURAN, which Pyrex from Corning is similar to, is not only used for laboratory devices (e.g. components of chemical devices, beakers,

Erlenmeyer flask An Erlenmeyer flask, also known as a conical flask (British English) or a titration flask, is a type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck. It is named after the German chemist Emil Erlenmeyer ...

s, etc.) but also in

cathode ray tubes A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. The images may represent electrical waveforms (oscilloscope), pictur ...

, transmitting tubes, and speculums. This glass was developed by

Otto Schott Friedrich Otto Schott (1851–1935) was a German chemist, glass technologist, and the inventor of borosilicate glass. Schott systematically investigated the relationship between the chemical composition of the glass and its properties. In this wa ...

in 1887. In 1938 the brand ''DURAN'' was subscribed at the Reichspatentamt and registered in 1943.

Milestones

1887: Otto Schott invented the glass 1943: The brand was registered for patent under the trade name DURAN 1950: DURAN

tubing became and has remained the standard material in the production of laboratory glass items 2011: SCHOTT Tubing in Mitterteich, Germany, was the first to produce DURAN tubing with a length of 10 meters, making it the longest industrially produced glass tube 2015: SCHOTT in Mitterteich set a world record by manufacturing DURAN tubing with an outside diameter of 460 mm, the largest ever industrially produced glass tubing 2017: DURAN Group is now DWK Life Sciences.Merger with other companies
Retrieved 2020 May 25.

Properties

* High chemical resistance * Outstanding transmission properties * High thermal capacity and resistance to thermal shock * Strong

electrical insulator An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons which cannot readily move. Other materials—semiconductors and conductors—conduct electric current ...

* transparency in the visible and infrared range of the electromagnetic spectrum * High resistance to scratches * Easily cleaned smooth surface

Applications

* Laboratory devices * Product presentation * Giftware * Explosion proof lighting * Interior design * Sprinkler fuses * Photobioreactors for ideal algae growth *

Heat exchangers A heat exchanger is a system used to transfer heat between a source and a working fluid. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct conta ...

* Sight glasses * Ventilation systems * Glass Kettles * Water Pipes Duran is currently available in hollow glass products. It is either formed by a molding process into final glass products like

s or drawn as a

tube Tube or tubes may refer to: * ''Tube'' (2003 film), a 2003 Korean film * ''The Tube'' (TV series), a music related TV series by Channel 4 in the United Kingdom * "Tubes" (Peter Dale), performer on the Soccer AM television show * Tube (band), a ...

by SCHOTT Tubing. Such tubes are typically a semi-finished product for further processing, which provide higher precision in its cylindrical geometry and better optical clarity than molded hollow glassware.

References

{{Reflist

External links

Duran-Group.com

Laboratory Glassware
German brands Glass trademarks and brands