Tubing assembly and cleaning

First check whether your laboratory screw joint (inner diameter) fits your tubing (outer diameter). If it is still difficult to put the tubing inside the inner parts of the laboratory screw joint, a trick can be helpful. Just either sharpen the tubing with a simple sharpener or cut it diagonally. You should now be able to easily put the tubing through the inner parts.

With BOLA Tube Fittings and Reducing Unions, transition from imperialGlossaryimperial A system of units based on Inches. In Europe, the imperial system (which is still very common in the USA) has been replaced by the metric system. With BOLA Tube Fittings and Reducing Unions, a transition from metric to imperial tubing can easily be made. The conversion from mm to inch can be found here. to metricGlossarymetric The metric system is an international decimalised system of measurement. In Europe, the system was introduced in the 19th century to achieve international comparability. With BOLA Tube Fittings and Reducing Unions, a transition from metric to imperialGlossaryimperial A system of units based on Inches. In Europe, the imperial system (which is still very common in the USA) has been replaced by the metric system. With BOLA Tube Fittings and Reducing Unions, a transition from metric to imperial tubing can easily be made. The conversion from mm to inch can be found here. tubing can easily be made. The conversion from mm to inch can be found here. tubing or connections between both can easily be made. For example: A pipe socket of an analytical device with an outer diameter of 1/4" shall be connected to a PTFEGlossaryPTFE Polytetrafluoroethylene tubing with an outer diameter of 8 mm.
Needed components: Reducing union 6 mm to 8 mm (Cat.No. D 526-10) and a set of tapered V-rings Ø 1/4" (6.35 mm; Cat.No. D 502-03). By exchanging the 6 mm V-rings with the 1/4" V-rings, the pipe socket can be connected to the 1/4" reducing union and the 8 mm PTFEGlossaryPTFE Polytetrafluoroethylene tubing on the other side.

At high temperatures, under vacuum or with thin wall thickness we recommend
to support the tubing in the laboratory screw joint. This can for example be made by using a short piece of glass or metal tube. Consequently, the tubing cannot turn off to the inside and become leaky. This trick allows also to connect elastic, gummy tubing to GL threads by means of BOLA Laboratory Screw joints.