Thick-walled steel pipe is a kind of economical section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames and steel scaffolding used in construction. In addition, when the bending and torsional strength are the same, the thick-walled pipe with lighter weight has a larger section modulus than the thin-walled pipe with the same section. Special-shaped steel pipes with other cross-sectional shapes are also required according to different purposes. In addition to being directly used to transport fluids, large-diameter thick-walled steel pipes are also widely used as the original pipes of galvanized welded steel pipes for low-pressure fluid transport.
1. The specifications of the general-purpose seamless square tube are: 200*20600*6000mm;
2. Specifications of seamless square and rectangular tubes for high pressure boilers: Thickness: No. 20-40;
3. The specification of the seamless square tube for geological brick exploration: 400*10500*8000mm;
4. Specifications of seamless square and rectangular pipes for petroleum cracking: thickness: 20#-40#.
5. Carbon steel seamless round pipe for ships (gb5312-1999) is an important tool for manufacturing high-quality carbon structural steel hot-rolled and cold-drawn (rolled) steel sheets or strips for ship I-grade pressure-resistant piping system-grade pressure-resistant shell ribs. one of the raw materials.
6. High-pressure alloy pipe for fertilizer equipment (20g): It is mainly used to transport high-temperature and high-pressure fluid pipes on fertilizer equipment. Its representative materials are 20, 12crmo, 12cr2mo, etc.
7. Alloy steel pipes for low and medium pressure boilers (12cr1movg): mainly used for pipelines for conveying low and medium pressure fluids in industrial boilers and domestic boilers.
8. Structural stainless steel welded square and rectangular threaded steel bars (hrb335-2006): helical quadrangular prisms with a diameter of 16~40mm×12~50mm and a bright bar-shaped steel with a spiral weld.
9. Small-caliber stainless steel bright profile for building sanitary ceramics (304-2007): This product is suitable for decoration and decoration industry. It is mainly used in washbasin, washbasin and other countertops and products in other industries for interior and exterior decoration.
10. The non-standard special-shaped blanks formed by the machining center of the high-precision inner hole surface lathe with a precision inner diameter of not less than 30mm for the automobile half-shaft casing.
11. Special cold drawn low carbon thin wall finish rolling bright cylindrical roller bearing for diesel engine crankshaft connecting rod bearing.