American Water Works Association.; American National's AWWA standard [for] installation of steel water pipe--4 in. PDF

By American Water Works Association.; American National Standards Institute

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Extra info for AWWA standard [for] installation of steel water pipe--4 in. (100mm) and larger

Sample text

Care shall be taken not to damage coatings during compaction. Proper equipment and care in placement will ensure the required compaction under the lower quadrant of the pipe. Pipe zone backfill for pipe up to 48 in. (1,200 mm) in diameter shall be placed in layers of not more than 6 in. (150 mm) in thickness or 25 percent of the pipe diameter, whichever is greater. Pipe zone backfill for pipe larger than 48 in. (1,200 mm) in diameter shall be placed in layers not exceeding 24 in. (600 mm) in thickness and subject to meeting the compaction requirements.

Wipe clean the area to be taped and make sure it is dry and free from dirt. c. Prime the area to be repaired and let the primer dry to a tackiness before applying the repair tape. d. Cut the tape to such a size that it extends beyond the damaged area for a minimum of 4 in. (100 mm) in all directions around the area to be repaired. Apply the tape starting at the center and working toward the edge, making sure to smooth out all wrinkles. Make sure the primed area extends past the tape edges. e. Only one layer of repair tape is required on damages that affect the outer layer of tape.

When installing pipe 36 in. (900 mm) and larger, use a probe rod method to confirm that the backfill is properly consolidated within the pipe lower quadrant (between the pipe spring line and invert elevation). Take care to ensure that the pipe is not floated or displaced before backfilling is complete. 4 Cohesive soils shall be compacted with mechanical equipment or hand tamping. Care shall be taken not to damage coatings during compaction. Proper equipment and care in placement will ensure the required compaction under the lower quadrant of the pipe.

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AWWA standard [for] installation of steel water pipe--4 in. (100mm) and larger by American Water Works Association.; American National Standards Institute


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