Concrete can be poured over steel pipes, steel pipes can also be embedded or encased in concrete, so if someone consider concrete cannot be pour over steel pipes, that is wrong. For some types of utility pipe, like gas, plumbing, or other pressurized pipe, it usually is avoided by either sleeving the steel pipe, or by wrapping the pipes with a protective material, or by routing them underneath or above the concrete.
A real project we made before
We have placed steel electrical conduits (galvanized steel) in miles of pipelines that are wrapped directly in concrete to prevent damage to heavy equipment when operating nearby. We have a steel pipe column in the concrete, and the buried pipe is partially coated with epoxy asphalt to reduce the corrosion that may occur when a dialectical reaction may cause corrosion.
Corrosion about pressure steel pipe
The pressure pipe that passes through the concrete slab or foundation is jacketed because the concrete block may settle or move, causing the fitting to loosen and cause leakage. Since the leak under the plate or foundation is difficult to detect and repair, the casing isolates the pipe from the concrete block, allowing movement without damaging the pipe. If a bushing is not required, such as an electrical penetration through the floor, the steel pipe is wrapped with PVC tape so that the concrete is no longer in contact with the concrete, thereby reducing potential corrosion.
This is a galvanized steel pipe, which completely corrodes the place where it penetrates the concrete slab. By the way, the image rotates 90 degrees and I don’t know how to change it… But you can see that corrosion is a “cancer” that continues to fight metals.
There are some suggestions about steel pipes choice. At the first, considering to purchase quality galvanized steel pipes is main solution way. The second, checking the junction of pipes and concretes often is good way. The third, using anti corrosion methods to protect your steel pipes as well before you embed the pipes into concretes.