ASTM D1796 & D4007 & IP75

Why is it important to determine the water and sediment is fuels?

The water and sediment content of fuel oil or crude oil is significant because it can cause corrosion of equipment and problems in processing. A determination of water and sediment content is required to measure accurately net volumes of actual fuel or crude oil in sales, taxation, exchanges, and custody transfers.

Summary of the test method

Equal volumes of fuel or crude oil and water-saturated toluene are placed in each of two cone-shaped centrifuge tubes.  The cone-shaped centrifuge tubes are immersed in the vertical position to the 100 mL mark in a liquid bath of sufficient depth. The sample is preconditioned at 60°C inside the liquid bath. After centrifugation, the volume of the higher density water and sediment layer at the bottom of the tube is read.

Why should you use a  Tamson liquid bath to preheat the samples?

The TC16 liquid bath is according to the requirements of above mentioned ASTM D1796, ASTM D4007 and IP 75 test methods where a liquid bath is prescribed to preheat the cone-shaped centrifuge tubes. The liquid bath has place for nine cone-shaped centrifuge tubes. The temperature range is from ambient +5°C to 250°C. With the levelling platform (P/N 13T8010) you can immerse the cone-shaped centrifuge tubes in the vertical position to excactly the 100-mL mark as indicated in the  ASTM D1796, ASTM D4007 test methods. The centrifuge is offered as an option and can be found on the specification sheet for ASTM D91.

Please contact our sales team (sales@tamson.nl) to get a quotation. Or visit our webshop to get price and technical information of a Tamson TC16 liquid bath and the required accessories to preheat the cone-shaped centrifuge tubes as prescribed in the ASTM D1796, ASTM D4007,  and IP 75 methods to determine water and sediment in fuels by a centrifuge.