Claims
- 1. A method for joining a first end of a first fluoropolymeric liner to a first end of a second fluoropolymeric liner, said fluoropolymeric liners comprising PTFE or modified PTFE material, comprising the steps of:applying a layer of PFA or FEP to at least one of said first ends; heating said first ends by contacting said first ends to a surface heat source; pressing said heated first ends together to form a weld.
- 2. The method of claim 1 wherein said surface heat source has a temperature of from about 590 degrees Fahrenheit to about 950 degrees Fahrenheit.
- 3. The method of claim 1 wherein said first ends are contacted to said surface heat source at a pressure of from about 15 pounds per square inch to about 150 pounds per square inch.
- 4. The method of claim 1 wherein said first ends are contacted to said surface heat source for a time period of from about 1 minute to about one hour.
- 5. The method of claim 1 further comprising surrounding the weld with a support.
- 6. The method of claim 5 wherein the support comprises PFA, PTFE or modified PTFE.
- 7. The method of claim 6 wherein the support is in the form of a tape or a solid ring.
FIELD OF THE INVENTION
This application claims the benefit of U.S. Provisional Application Ser. No. 60/073,813 filed Febraury 5, 1998. The present invention relates to components for lined piping systems and, more particularly, to metal pipe lined with fluoropolymer material.
US Referenced Citations (10)
Provisional Applications (1)
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Number |
Date |
Country |
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60/073813 |
Feb 1998 |
US |