Coiled pipe is available in sizes through 6 IPS. Coiling may leave a bend in some pipe sizes that must be addressed in the preparation of the butt fusion process. There are several ways to address this situation:
- Straighten and re-round coiled pipe before the butt fusion process.
- If there is still curvature present, install the pipe ends in the machine in an "S" configuration with print lines approximately 180° apart in order to help gain proper alignment and help produce a straight joint. See figure below.
- If significant curvature remains, another option would be to install a straight piece of pipe between the two coiled pipes.
- Every effort should be made to make the joint perpendicular to the axis of the pipe.