Round bottom flasks with standard ground joint

Made from Duran borosilicate glass tubing

Round-bottom flasks made of borosilicate glass with standard ground joints, ideal for heating, mixing, reactions, and handling liquids in laboratory applications.

The spherical bottom promotes more uniform heat distribution, making these flasks particularly suitable for applications requiring controlled heating, such as distillation, chemical reactions, and solution preparation. Borosilicate glass provides high thermal and chemical resistance while ensuring excellent visibility of the contents.

The standard ground joint allows connection to condensers, adapters, and other compatible glass components, facilitating the assembly of modular systems and experimental apparatus.

Available in different capacities and with various NS joint sizes, they are suitable for chemical, pharmaceutical, university, research, and quality-control laboratories.

Scientific blown glassware is manufactured through hot working of borosilicate glass, a material particularly suited to laboratory applications due to its high thermal and chemical resistance and excellent resistance to thermal shock. Shaping is carried out by localized flame heating, controlled rotation of the glass, and air blowing to obtain precise geometries, uniform wall thickness, and smooth transitions with minimal internal stress.

The main processing techniques include blowing, drawing, constriction, expansion, glass-to-glass sealing, and the manufacture of standard ground joints, connectors, hose connections, stopcocks, and special fittings. Particular attention is paid to concentricity, wall thickness uniformity, and the continuity of welded joints, all of which are essential for reliable performance during heating, vacuum operation, and fluid transfer.

After forming, the glassware undergoes controlled annealing to reduce internal stresses generated during hot working. This process improves mechanical stability and resistance to thermal shock, making the glassware suitable for both standard laboratory applications and custom-designed experimental systems.

Round-bottom flasks with standard ground joint

Made from Duran borosilicate glass tubing