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Processing requirements for Stainless Steel Pipe Ferritic

Nov. 13, 2019

Stainless Steel Pipe Ferritic is very unique in terms of model size and appearance. First, the thicker the wall of such stainless steel pipe, the higher the cost performance and practicality, and the thinner the pipe wall, the greater the processing cost. The increase, in addition, the performance limitation of the stainless steel tube depends on the processing technology. Generally, the precision of the seamless steel pipe is low, and the thickness of the pipe wall is not uniform, the brightness of the inner and outer surfaces of the pipe is low, and the cost of the fixed-length is relatively expensive. The surface is prone to pitting, black spots and is not easy to remove. In addition, the inspection and shaping of the precision stainless steel tube thick-walled tube must be processed offline. Therefore, the stainless steel pipe exhibits sufficient superiority in the field of high-pressure, high-strength mechanical structural materials.

Stainless Steel Pipe Ferritic

Stainless Steel Pipe Ferritic

Stainless steel pipes are mainly divided into hot rolling, hot extrusion and cold drew (rolled) stainless steel pipes according to the rolling process. According to the difference in stainless steel metallographic structure, it mainly includes semi-ferritic semi-Martensitic stainless steel pipe, martensitic stainless steel pipe, Austenitic Stainless Steel Pipe, and ferritic stainless steel pipe.

According to the specifications, the specifications of the stainless steel  pipe is mainly in accordance with the provisions of GB14975-94 "stainless steel seamless steel pipe", in which the general length of the thick stainless steel pipe thick pipe (indefinite) is 1.5-10m for hot rolled steel pipe and the hot extruded steel pipe is greater than or equal to 1m. The cold drawn (rolled) stainless steel pipe has a wall thickness of 0.5-1.0 mm and a length of 1.0-7 m; a wall thickness of more than 1.0 mm and a length of 1.5-8 m.

A total of about 45 types of hot-rolled (hot extruded) stainless steel pipes having a diameter of 54-480 mm and a total of about 36 types having a wall the thickness of 4.5-45 mm. The cold drawn (rolled) stainless steel tube has a total of 65 kinds of diameters of 6-200 mm and a total of 39 types of the wall thickness of 0.5-21 mm.

The inner and outer surfaces of precision stainless steel pipe thick-walled pipes shall not have defects such as cracks, folds, cracks, cracks, rolling, separation and crusting and such defects shall be completely removed (unless they are specially used for machining). And after the stainless steel pipe wall is removed, the wall thickness and the outer diameter cannot exceed the negative deviation. As long as it does not exceed some minor surface defects that allow negative deviations, it may not need to be removed.

The allowable depth of stainless steel straights is also required. Hot-rolled, hot-extruded steel pipe, stainless steel pipe with a diameter of 140mm or less and not more than 5% of the nominal wall thickness, the maximum depth is less than or equal to 0.5mm, and the cold drawn (rolled) stainless steel pipe is not more than 4% of the nominal wall thickness, the maximum The depth is less than or equal to 0.3 mm.

The last thing to note is that the precision stainless steel tube the thick-walled tube needs to be cut at right angles and removed from the tube wall before application. Our company is Welded Stainless Steel Pipes Manufacturer China, if you are interested in us, if you need it, please come to consult.


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