Installation Overview

1. Tite Liner“ polyethylene liner pipe is manufactured and delivered to the site in joint lengths of up to 20 meters (65 feet). Sizes 4" and smaller can be pro-vided on reels.

2. & 3. The liner pipe is joined together by a process called thermal fusion - the liner pipe ends are heated to the melting tem-perature, then joined together under pressure and allowed to cool. The completed joint has the qualities of the liner pipe. The fusion tent protects the liner pipe and operator in inclement weather and allows good control over the joining environment.

4. The fusion joint is inspected and then the external bead is removed.

5. The specially machined steel flange is attached to the steel pipe.

6. A pulling head is fusion joined to the pulling end of the liner pipe. This high-strength head is designed to provide an even pull on the liner pipe.

7. A wireline (cable) is inserted through the pipe using compressed air and a blow-down pig.

8. United's Roller Reduction Box is positioned at the flange on the end of the line where the liner pipe will enter the steel pipe.

9. The Tite Liner pipe is now pulled through the hydraulically powered Roller Reduction Box. The tension maintained between the Roller Reduction Box and the wireline keeps the liner pipe in its reduced diameter until completely pulled through the line. The liner pipe is installed normally at a rate of 30 meters (100 ft.) per minute.

10. After the liner pipe is pulled into the steel pipe, the tension is eased and the liner pipe returns to fit tightly against the inside of the steel pipe.

11. United designs and manufactures polyethylene flange-fittings specially for each project.

12. The liner pipe is pulled and clamped in position for fusion joining.

13. The liner pipe end is trimmed, faced, and joined to the polyethylene flange-fitting.

14. The clamp is removed, and the polyethylene flange-fitting retracts into the steel pipe to fit the steel flange.

15. The steel spacer ring is placed around the raised face of the steel flange and the polyethylene flange fitting. When the steel flanges are bolted together, the spacer ring assures that only the required amount of compression is exerted on the polyethylene flange-fitting to provide a pressure seal.

16. The two steel flanges are positioned and bolted together.