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Answer : the pre-treatment on the shipbuilding steel.
Make some process on the steel before marking them. like correcting the steel, blasting and priming work when the ship rolled steel often uneven due to rolling, rolling uneven shrinkage after cooling or transport, storage, process and other factors affect the existence of various deformation. To this end, plates and profiles after removing from the steel material yard, respectively, the first multi-roll steel sheet leveling machine and straightening machine correction to ensure that number expected, and forming the edge of the normal. Steel generally will be corrected by polishing rust, primer and spray drying the final. After this treatment the number of steel material can be sent to these processes often composed of pre-auto assembly line, the use of transfer roller steel and steel materials yard material lifting, material number, edge processing and other follow-up processes of convergence of transportation lines to achieve the hull parts preparation and processing of integrated mechanization and automation.
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
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BBN SHIP STEEL FACTORY
