The small and medium diameter ERW electric welded pipe mainly adopts the continuous roll forming method, and also adopts the row roll forming method

Steel sheet pile is a kind of section steel with lock. Its section has straight plate shape, groove shape and Z shape, etc., and there are various sizes and interlocking forms. The common ones are Larson type, Lackawanna type and so on. Its advantages are: high strength, easy to drive into hard soil; it can be constructed in deep water, and if necessary, it can be added with oblique supports to form a cage. Good waterproof performance; cofferdams of various shapes can be formed according to needs, and can be reused many times, so it has a wide range of uses.

Oil well pipe (OCTG pipe), also known as oil special pipe, is a kind of steel pipe specially used for oil and natural gas exploitation. Most of them are seamless pipes, but welded pipes also account for a considerable proportion.

Steel sheet piles can be divided into: hot-rolled (stretched) steel sheet piles and cold-formed steel sheet piles according to different processing and manufacturing processes.According to the shape, it can be divided into: U-shaped steel sheet pile, Z-shaped steel sheet pile, L/S-shaped steel sheet pile, and linear steel sheet pile.

Firstly, the steel sheet piles should be processed, and the surface defects should be treated well, and the length, width, lock shape and other components should be inspected. If there are affected weldments, they need to be disposed of in advance. If there is serious corrosion, the actual thickness needs to be measured and reduced.

The seamless steel pipe is made of high-quality round steel as the main material, and then the round steel is perforated. The principle of perforation is to use high temperature to soften the round steel, and then use the plug to remove all the solid parts in the middle to become hollow round steel, that is, seamless steel pipe.