08-29
/ 2023
Seamless steel pipe is made of steel ingot or solid tube blank by perforation, and then made by hot rolling, cold rolling or cold dial. The seamless steel pipe has the important status in our country steel pipe industry. According to incomplete statistics, our country existing seamless pipe production enterprises about more than 240, seamless steel pipe set about more than 250 sets, the annual capacity of about 4.5 million tons. From the diameter < 76, accounted for 35%, < phi 159-650, accounting for 25%. From the perspective of varieties, general purpose pipe 1.9 million tons, accounting for 54%; 760,000 tons of oil pipelines, accounting for 5.7%; 150,000 tons of hydraulic struts and precision pipes, accounting for 4.3%; Stainless pipes, bearing pipes and automobile pipes accounted for 50, 000 tons, accounting for 1.4%.
08-29
/ 2023
A, Local tortuosity: using a meter long ruler to measure the string height (mm) at the bending of the steel pipe, that is, the value of local tortuosity. The unit is mm/m and the display mode is 2.5mm/m. This method is also applicable to the curvature of the tube end.
08-28
/ 2023
For stainless steel welded pipe and stainless steel seamless pipe, although both are stainless steel pipe, but there is a big difference between them, there is a gap in the application field, and the use determines the material, process, surface and so on of both.
08-27
/ 2023
C:0.12-0.20, Si: ≤0.30, Mn: 0.30-0.70, S≤ 0.045P: ≤0.045, Cr: ≤0.30, Ni: ≤0.30, Cu: ≤0.30.
08-26
/ 2023
With the aid of pickling paste or spray to passivate the corroded parts to form a chromium oxide film to restore its corrosion resistance. After pickling, in order to remove all contaminants and acid residues, it is very important to properly rinse with clean water. All treatment with polishing equipment to re-polish, with polishing wax can be closed. The local slight rust can also be used 1:1 gasoline, oil mixture with a clean rag to wipe the rust.
08-26
/ 2023
Thick steel plate: thickness greater than 4\5\6\8\10\12\14\16\20\25\30\40\50,10 width less than 2000mm,10 width generally 2000, 2500mm, length 4-12m.
08-24
/ 2023
Cold rolled strip is widely used, such as automobile manufacturing, electrical products, locomotives and vehicles, aviation, precision instrument, food canning, etc. Cold rolled sheet is short for cold rolled sheet of ordinary carbon structural steel, also known as cold rolled sheet, commonly known as cold plate, sometimes mistakenly written as cold plate.
08-23
/ 2023
Stainless Steel (Stainless Steel) is short for stainless steel, resistant to air, steam, water and other weak corrosion media or stainless steel called stainless steel; And the chemical corrosion medium (acid, alkali, salt and other chemical erosion) corrosion steel called acid - resistant steel.
08-23
/ 2023
Like cold rolled ordinary sheet steel, cold rolled high quality carbon structural steel sheet is also the most widely used sheet steel in cold plate. Cold rolled high quality carbon thin steel is made of high quality carbon structural steel, and the thickness is less than 4mm by cold rolling.