What you should know about the choice of tubing

Incorrectly chosen tubing can endanger the user. Here you can find the most important features in tabular form. The number of “+”-signs stands for the degree of performance of the feature.

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Our tip: PTFE tubing is ideal for the “normal” work in laboratories.

If you need tubing which is absolutely gastight even in limit range of pressure and temperature, you should choose PFA or FEP. PFA only has advantages at temperatures of more than +205°C, but is more expensive than FEP tubing.

We shape and bend … according to your needs

FEP and PFA tubing is most suitable for shaping or bending. A special thermal procedure is applied to shape the tubing to the requested form. Please contact us for a free and non-binding quotation. We connect and assemble … according to your needs We can offer you our “know how” for cutting tubing, assembling fittings (either from our standard range or suitable for your specific system) from single pieces to complete series manufacturing. Please contact us for a free quotation.

We connect and assemble … according to your needs

We can offer you our “know how” for cutting tubing, assembling fittings (either from our standard range or suitable for your specific system) from single pieces to complete series manufacturing. Please contact us for a free quotation.

Thin tubing at vacuum and high temperatures

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.

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Processing of heat shrinkable PTFE tubing

Shrinking should be done at a temperature of +340 °C +/-10 °C. (At approx. +327 °C the appearance of PTFE changes from white to transparent). Please note that the part to be coated has to withstand the shrinking temperature. Temperatures exceeding +350 °C lead to overheating of the heat shrinkable tubing and destroy its plastic memory (shrinking capacity). Thus, the tubing becomes unusable. Steady heating and cooling from all sides provides the best result, otherwise creases and tearing can arise. Appropriate heat sources are ovens or air heaters. We strongly advise against using gas flames as this can lead very easily to irregular overheating. Longitudinal shrinkage can occur during shrinking. The longitudinal shrinkage is approx. 15 %.

Safety instructions:
Use adequate ventilation to assure removal of toxic vapours which may be produced by overheating!

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