The 80 you are talking about should be the nominal surgical standard of 80mm, and the actual national standard outer diameter is 89mm. The outer diameter of this steel pipe is not large, and it is available in our company, 5200. per ton.
If the buried pipe is deeply buried, it is not necessary to determine the thickness. The main factor to consider is cost. If it is too thick, the quantity will be too large and the cost will be high. It is not recommended to bury galvanized pipes directly in the ground. Certain anti-corrosion measures must be taken, otherwise they will have a lifespan.