End-To-End Seal with Two Different Size Tubing

End-To-End Seal with Two Different Size Tubing

 Set Up:

-         8 & 14 mm (any larger tubing will do) Pyrex tubing

-         # 1 tip

-         Matches/mats/towel/glass cutter/screen

-         Blow tube/cork (use cork....NOT rubber!!)

End-To-End Seal (8 & 14mm tubing):

-         Cut 1 piece of 8 & 14 mm tubing, about 6" long.

-         Use a # 1 tip.

-         Make a test tube from the 14 mm tubing.

-         Heat the end of the test tube and blow a small bulge.

-         Heat the small bulge and blow out the bulge.

 

-         Flint knap the rough pieces, leaving a small part of the small bulge.

-    Add a small cork stopper to one end of the 8 mm tubing.

-         Heat the ends together of the small bulge and the 8 mm tubing, remove from the heat, push them together then slightly pull them apart.

-         Heat one side and allow to collapse

-         Remove from heat and blow to diameter of surrounding tubing (8 mm).

-         Repeat for the other three sides.

-    Fire polish the ends (heat the ends enough to create a smooth edge).

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