The following installation guidelines are recommended practices that help ensure successful installations.

HDPE dual wall corrugated pipe construction and connection method:
1. The pipe should be inspected for shipping damage. If damaged cracks, deformation defects were found, these should be promptly removed.

2. Check the connection with the pipe should be sealed with flexible packing flexible joint, according to the specific structural design requirements.

3. Excavation trench
Excavate trenches to ensure that sides will be stable under ALL working conditions.
Slope trench walls or provide supports for the walls in conformance with all local and national standards for safety. The trench should be backfilled as soon as possible but not later than the end of each workday. Pipe should not be laid or embedded in standing or running water.
Where trench walls are stable or supported, provide a width sufficient, but no greater
than necessary, to ensure working room to properly and safely place and compact haunching and other embedment materials.
 (1) The trench bottom should clear width increases by 0.6m diameter pipe used.
 (2) Trench excavation should be good drainage measures to prevent the bottom of the tank by water immersion.
 (3) The pipeline infrastructure must be gravel cushion on the general soil foundation, the thickness of 0.1m; on the ground, the thickness of not less than 0.2m, according to design requirements specific practices.
 (4) The base should be compacted, the surface should be smooth. The interface part of pipeline infrastructure to interface operation should be reserved for the groove. Groove length appropriate for the 0.4m-0.6m, depth appropriate for the 0.05m-0.1m, the width should be 1.1 times the diameter of the pipe.
4. Downloading the pipe
When the trench depth is not significant, lift tube into the trench by hand, if the trench depth is greater than 3m, then use non-metallic rope chute into the slot. It is strictly prohibited to use metallic rope or hooked ends of the pipe and rolling it into the trench.
5. Pipe Joining
Pipe should be placed into the trench and connected together in a manner that will not damage the structural integrity of the pipe or compromise the joint itself. The gasket should be lubricated with a lubricant prior to joining the pipes together. The spigot end should be inserted manually to insure the proper alignment and a machine may be required to finish pushing the pipes together. The receiving pipe must be sufficiently anchored to handle the force of the pipe fitting into the bell. An installation stub should be inserted into the bell of the 2nd pipe to push the pipes together. This will reduce the chances of damage by pushing against the pipe with the machine. The spigot end should be pushed into the pipe until the Home Position (painted dot on corrugation) is just on the outside of the bell. Attempting to push Home position into the bell will result in damaging the pipe and the bell. If the joint does not completely connect, take the pipe apart, clean the bell and spigot and attempt it again.
6. Backfill
The haunching is the most important part of the installation process since it provides
the primary support for the soil and traffic loadings. Haunching should be placed in maximum 6” layers uniformly on both sides of the pipe. Tamp or ram to achieve the specified compaction. If the material does not require compaction shovel into the area, eliminating voids, Construction of each layer should be repeated up to the springline.
 1. Maxillary angle position (2d angle range) in the first application of sand, coarse sand provided.
 2. Based on the top part of the beginning to the pipe within the tank above 0.7m to be using artificial backfill.
 3. 0.7m above the top tube from the pipe axis machine can be used on both sides, and backfill, compaction.
 4. Groove side of each part of the soil used to backfill the best degree of compaction (%) should be the design requirements or by CECS122: 2001 technical specification requirements.
Handling & Stockpiling / Storage
 1. The pipe is designed to withstand normal field handling and can be easily unloaded by hand or with equipment. To avoid damage the pipe should not be dropped. Additionally, tie down straps or bands should not be removed until the pipe has been secured to prevent rolling or dropping the pipe.
 2. Handling should be accomplished by hand, lifting tongs or nylon slings. When using slings, two pick points are recommended.
 3. Stockpile pipe as close as possible to its final location but away from construction traffic and construction activities. Pipe should be stockpiled on level ground and if stacked, blocking should be provided to prevent rolling. Stacked pipe should be placed with bells alternated on successive layers and the bells should overhang the layer below to prevent deforming and damaging the bell.
 4. The protective wrap on the gaskets of the spigot end should be left on the pipe until it is ready for installation. Lube, couplers and fittings should be stored with the pipe. Couplers and fittings should be stored flat to prevent damage and misshape. Stockpile height should not exceed 4 meters.