Cement mortar lined anti-corrosion spiral steel pipe is a water supply steel pipe that forms a cement coating on the inner wall of the steel pipe through a centrifuge or pipeline spraying machine, mainly to extend the service life of the water supply pipeline, protect water quality, and improve the water supply capacity of the pipeline. Execution standard: CECS10:89 or GB50268-2008. Pipe diameter range: 159mm-2220mm, applicable range: used for anti-corrosion of the inner wall of water transmission steel pipes.

Standard for anti-corrosion spiral steel pipes: FBE epoxy powder anti-corrosion shall comply with SY/T0315-1997 "Technical Standard for Fusion bonded Epoxy Powder External Coating of Steel Pipelines"

2PE/3PE anti-corrosion shall comply with SY/T0413-2002 (test) "Technical Standard for Polyethylene External Coating of Buried Steel Pipelines"

Anti corrosion surface rust removal standard: The sandblasting rust removal on the outer surface of the steel pipe shall meet the Sa2 1/2 level according to GB/T8923-2008 requirements, and the anchor depth on the surface of the steel pipe shall be between 40-100 μ m.

The cement mortar anti-corrosion spiral steel pipe is filled with concrete, which can absorb a large amount of heat energy. Therefore, when subjected to a fire, the temperature distribution of the pipe column section is very uneven, which increases the fire resistance time of the column, slows down the heating rate of the steel column, and once the steel column yields, the concrete can bear most of the axial load, preventing structural collapse. The fire resistance of composite beams will also be improved, as the temperature of the steel beams will be reduced by transferring heat from the top flange to the concrete. Experimental statistical data shows that meeting the requirement of a first level fire resistance of 3 hours can save 1/3 to 2/3 or even more fireproof coatings compared to steel columns. As the diameter of the steel pipe increases, more coatings are saved.

The grades of cement mortar anti-corrosion steel pipe mortar include M3, M5, M7.5, M10, M12.5, M15, M20, M25, M30, M40. Mortar is divided into several types according to its use, including masonry, plastering, and jointing, regardless of its grade. After the completion of cement mortar work, the most important process is air drying. It refers to drying in the wind for 2-3 days in a natural state. Mainly to prevent cracks in cement mortar caused by bumps during shipment.

The performance of steel components under external forces still has a certain impact. It may have adverse effects on deformation, stability, fatigue resistance, and other aspects. Hot rolled steel products are difficult to control in terms of thickness and edge width. We are familiar with thermal expansion and contraction. At the beginning, even if the length and thickness meet the standards during hot rolling, there will still be a certain negative difference after cooling. The wider the edge width and the thicker the thickness, the more obvious this negative difference will be. So for large-sized steel, it is not possible to require too precise specifications for the width, thickness, length, angle, and edge lines of the steel.

Cement mortar anti-corrosion steel pipe internal anti-corrosion

1. Three layer polyethylene (3PE) steel pipes for corrosion prevention and two-layer polyethylene (2PE) steel pipes for corrosion prevention in oil and gas.

2. FBE (single-layer fusion bonded epoxy powder anti-corrosion) steel pipes and 2FBE (double-layer fusion bonded epoxy powder anti-corrosion) steel pipes are used for oil and gas.

3. IPN8710 polymer non-toxic coating for water supply pipeline internal anti-corrosion of steel pipes.

4. High density polyethylene polyurethane foam insulated steel pipe.

5. Cement mortar lined steel pipes for water supply pipeline internal anti-corrosion.

6. Epoxy coal tar glass cloth steel pipe anti-corrosion.