The so-called steel pipe is divided into two categories: seamless steel pipe and welded steel pipe.
Galvanized pipes are galvanized on steel pipes. Hot dip galvanized and cold galvanized. Can be seamless steel pipe or welded steel pipe. Seamless steel pipe can be processed into galvanized pipe, galvanized pipe may be seamless steel pipe, welded steel pipe may also be seamless steel pipe can be processed into galvanized pipe, galvanized pipe may be seamless steel pipe, it may be Welded steel pipe.
Classification of seamless steel tubes: Seamless steel tubes are divided into hot-rolled and cold-rolled (dial) seamless steel tubes.
Hot-rolled seamless steel tubes are divided into general steel tubes, low- and medium-pressure boiler steel tubes, high-pressure boiler tubes, alloy steel tubes, stainless steel tubes, petroleum cracking tubes, geological steel tubes, and other steel tubes.
Cold-rolled (dial) seamless steel pipes include general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes and alloy thin-walled steel pipes. Stainless steel pipe, special-shaped steel pipe.
Welded steel pipe classification:
According to different welding methods can be divided into arc welded pipe, high frequency or low frequency resistance welded pipe, gas welded pipe, furnace pipe, Bondi tube and so on.
According to the shape of the weld, it can be divided into straight seam welded pipe and spiral welded pipe. It can be divided into general welded pipe, galvanized welded pipe, oxygen welded pipe, wire bushing, metric welded pipe, idler pipe, deep well pump pipe, automotive pipe, transformer pipe. , Welded thin-walled tubes, welded special-shaped tubes and spiral welded tubes.
Stainless steel tube classification:
Stainless steel pipe is divided into two categories: seamless steel pipe and welded steel pipe (seamed pipe).
According to the shape of the cross-section can be divided into round tubes and shaped tubes, widely used round steel tube, but there are also some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagonal and other special-shaped steel tube.
There are several kinds of common welded pipe, straight welded pipe, spiral welded pipe and seamless welded pipe, but straight welded pipe and spiral welded pipe are very good recognition, LZ is probably the difference between seamless welded pipe and seamless steel pipe .
It can be seen from several aspects:
First, the most obvious effect: pickling the second can be seen from the cross section of the pipe head, if there is rust, wipe him clean, if you look closely will find the welding area.
Third, welded pipes are generally of a fixed length, and are generally 6 meters, 9 meters or 12 meters. The length of the seamless steel pipe is very small, because the factory price increase of the length is very large.
Galvanized pipes are galvanized on steel pipes. Hot dip galvanized and cold galvanized. Can be seamless steel pipe or welded steel pipe. Seamless steel pipe can be processed into galvanized pipe, galvanized pipe may be seamless steel pipe, welded steel pipe may also be seamless steel pipe can be processed into galvanized pipe, galvanized pipe may be seamless steel pipe, it may be Welded steel pipe.
Classification of seamless steel tubes: Seamless steel tubes are divided into hot-rolled and cold-rolled (dial) seamless steel tubes.
Hot-rolled seamless steel tubes are divided into general steel tubes, low- and medium-pressure boiler steel tubes, high-pressure boiler tubes, alloy steel tubes, stainless steel tubes, petroleum cracking tubes, geological steel tubes, and other steel tubes.
Cold-rolled (dial) seamless steel pipes include general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes and alloy thin-walled steel pipes. Stainless steel pipe, special-shaped steel pipe.
Welded steel pipe classification:
According to different welding methods can be divided into arc welded pipe, high frequency or low frequency resistance welded pipe, gas welded pipe, furnace pipe, Bondi tube and so on.
According to the shape of the weld, it can be divided into straight seam welded pipe and spiral welded pipe. It can be divided into general welded pipe, galvanized welded pipe, oxygen welded pipe, wire bushing, metric welded pipe, idler pipe, deep well pump pipe, automotive pipe, transformer pipe. , Welded thin-walled tubes, welded special-shaped tubes and spiral welded tubes.
Stainless steel tube classification:
Stainless steel pipe is divided into two categories: seamless steel pipe and welded steel pipe (seamed pipe).
According to the shape of the cross-section can be divided into round tubes and shaped tubes, widely used round steel tube, but there are also some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagonal and other special-shaped steel tube.
There are several kinds of common welded pipe, straight welded pipe, spiral welded pipe and seamless welded pipe, but straight welded pipe and spiral welded pipe are very good recognition, LZ is probably the difference between seamless welded pipe and seamless steel pipe .
It can be seen from several aspects:
First, the most obvious effect: pickling the second can be seen from the cross section of the pipe head, if there is rust, wipe him clean, if you look closely will find the welding area.
Third, welded pipes are generally of a fixed length, and are generally 6 meters, 9 meters or 12 meters. The length of the seamless steel pipe is very small, because the factory price increase of the length is very large.
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