Steel pipelines are a critical component of oil, gas, and water transportation. Protecting them from corrosion is essential to ensure long service life and safety. Two of the most widely used external pipe coatings are 3LPE (Three-Layer Polyethylene) and FBE (Fusion Bonded Epoxy).

Mild steel plate is made of ordinary carbon steel, which is low in cost, moderate in strength, and easy to process and weld, but its surface is prone to rust and requires subsequent painting or anti-corrosion treatment.

Cold-dip galvanized steel pipe is a type of welded steel pipe whose surface has undergone electro-galvanizing treatment. It is widely used in building structures, electrical conduits, furniture manufacturing, and mechanical supports, offering a certain degree of corrosion resistance and good processing performance. Compared to hot-dip galvanized steel pipe, cold-dip galvanized steel pipe has a thinner coating and a smoother appearance, making it suitable for indoor or non-corrosive environments. In recent years, with the continuous advancement of urban infrastructure construction and the improvement of industrial manufacturing standards, cold-dip galvanized steel pipe still maintains a certain market share in light steel structures, power cable trays, and scaffolding. However, due to its relatively weak weather resistance, it is prone to corrosion in humid or acidic/alkaline environments, and therefore is gradually being replaced by higher-grade anti-corrosion materials in some high-requirement projects.

EN 10220 is a European standard that defines the dimensions and masses of seamless and welded steel pipes used in various industrial applications.

API 5L SSAW Steel Pipe refers to spiral welded steel pipe manufactured according to the pipeline standard issued by the American Petroleum Institute, specifically API 5L.SSAW stands for Spiral Submerged Arc Welded, a manufacturing method in which steel coils are formed into a pipe shape and welded along a spiral seam using submerged arc welding technology.   API 5L SSAW Steel Pipe Definitio...

API 5DP is a technical standard for steel drill pipe developed by the American Petroleum Institute (API). It aims to regulate the manufacturing, testing, and performance requirements of drill pipe in the oil and gas industry.