Description
In order to ensure the engineering quality, and no quality problems ofthe corrugated pipes, manufacturers should be focus on the postservice, should have independent construction site technical guidancepersonnel, guide and monitor the construction unit filling.Large aperture assembly tube manufacturers must have a professionalinstallation team, make sure bolts fastening force to meet the designrequirements.manufacturers must have backfill files for each culvert, if appear qualityproblems it will be easy to check.
