Corrosion prevention is crucial for ensuring the longevity of large-diameter steel pipes and for safeguarding water quality. Corrosion protection work is often overlooked in construction projects, yet it is an extremely critical task.
Through internal corrosion prevention, utilizing comparative protective methods and maintenance timing, the key factors affecting the quality of internal corrosion prevention were identified, along with corresponding protective measures. These findings provide a crucial basis for quality control for future projects.
In the aforementioned paragraph, it is evident that the quality of internal corrosion protection in pipeline construction can affect the service life of large-diameter steel pipes and even impact the water quality within the pipeline. Therefore, ensuring effective internal corrosion protection is a crucial aspect. There are numerous factors that can influence the quality of internal corrosion protection for large-diameter steel pipes, including: construction methods, speed, maintenance techniques, maintenance duration, machinery, and human factors...
For large diameter steel pipe jet sleeves, manufactured according to the actual pipeline dimensions on the construction site, primarily assembled using φ30 mm steel pipes and plates, the lapping gaskets require copper or stainless steel sheets of thickness between 1mm to 2mm.
Raw Material Preparation
Cement: Utilize P.O 42.5 cement, ensure it passes inspection before entering the site, and implement moisture protection measures for the cement upon arrival.
Huangsha: Choose medium to coarse sand with hard, clean, and well-graded particles. The quality and inspection methods should comply with the relevant standards in JGJ 52—2006 "Quality Standards and Inspection Methods for Sand Used in Ordinary Concrete."
The quality of soil, mica, organic impurities, and other harmful substances in the sand is less than 2% of the total weight. The sand is sent to a testing station for inspection, and upon passing the inspection, it is permitted for use.
Prior to use, all materials are meticulously sifted to ensure the cleanliness of the sand. The sand particles must pass through a 1.19 mm sieve; no more than 55% should pass through a 0.29 mm sieve; and no more than 5% should pass through a 0.149 mm sieve.