isolated tracer line in a pipe with controlled conductivity and process for the production of this tracer line

摘要

An isolated tracer includes an elongated tube (46), a layer of insulation (48) covering the tube (46), and a layer of tape (54) compressing the insulation (48) to provide a desired conductance rate for the isolated tracer. The isolated tracer is made by passing a tube (46) concurrently through a funnel shaped die (42) with a layer of insulation (48) and wrapping tape (54) around the insulation (48) after it leaves the die (42). The insulation (48) is compressed to a desired amount to provide a desired conductance rate by adjusting tension on the tape (54) as it is wound about the insulation (48) covering the tube (46).