The stainless steel seamless pipe is a long strip of steel with a hollow section and no seams around it. I believe there are many ways to make stainless steel seamless pipes, and here are a few simple ways to make them: hot-rolled, cold-rolled or cold-rolled. The specifications for stainless steel seamless pipes are expressed in terms of wall thickness in millimeters. Seamless steel tubes are divided into two types: hot rolled and cold rolled (dial) seamless steel tubes. Hot-rolled seamless steel pipes are divided into general steel pipes and seamless steel pipes: seamless steel pipes are made of steel ingots or solid pipe blanks through perforation. Low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.
Cold-rolled (dial) seamless steel pipe is divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipes, and also includes carbon thin-walled steel pipe and alloy thin-walled steel pipe. Stainless steel thin-walled steel pipe and special-shaped steel pipe. The outer diameter of the hot-rolled seamless pipe is generally larger than 32mm. The wall thickness is 2.5-75mm. The diameter of the cold-rolled seamless steel pipe can be up to 6mm. The wall thickness can be up to 0.25mm. The outer diameter of the thin-walled pipe can be up to 5mm. The wall thickness is less than 0.25mm. High precision. Generally, the seamless steel pipe is a seamless pipe made of low-alloy structural steel such as 1020303545 and other high-quality carbon steel 16Mn5MnV or low-carbon steel such as 40Cr30CrMnSi45Mn240MnB, which is hot-rolled or cold-rolled, and is mainly used for a fluid conveying pipe. Seamless tubes made of medium carbon steel such as 4540Cr are used to make mechanical parts, such as parts for automobiles and tractors. Generally, seamless steel pipes are required to ensure strength and flattening test. The hot rolled steel pipe is delivered in a hot rolled state or a heat treated state; the cold rolling is delivered in a heat treated state by heat.
Seamless steel tubes for low and medium pressure boilers: used in the manufacture of various low and medium pressure boilers, superheated steam pipes, boiling water pipes, water wall pipes and superheated steam pipes for locomotive boilers, large smoke pipes, small smoke pipes and arch brick pipes. Hot-rolled or cold-rolled (dial) seamless steel tubes are made of high-quality carbon structural steel. It is mainly made of steel No. 1020. In addition to ensuring chemical composition and mechanical properties, it is required to carry out hydraulic test, crimping, flaring and flattening. Hot rolling is delivered in a hot rolled state, and cold rolled (dial) is delivered in a heat treated state.
Stainless steel seamless pipe scrap production materials A lot of scrap steel can be produced, sometimes waste (only we do not need, or can not be used) is also a treasure, waste utilization, waste recycling, re-processing can also produce stainless steel without Sewing tube. In an age when resources are increasingly lacking, we need to cherish one thing and one thing. Mineral raw materials: carbon, chromium, nickel, manganese, silicon, molybdenum, etc. Waste stainless steel seamless pipe: There are three main sources of stainless steel seamless pipe scrap resources: First, the scrap produced in the production process of the manufacturer's stainless steel seamless pipe, such as remnant, cutting, cutting, trimming, etc.; Scrap steel produced during the manufacture or construction of stainless steel products, such as scraps, car scraps, etc.; third, life cycle recycling of scrap steel, such as used equipment or dismantled waste building materials. Due to the late development of stainless steel seamless pipe consumption and production in China, the life cycle of stainless steel is relatively long. Compared with the early stainless steel consumption countries, this part of China's stainless steel scrap resources is less. Domestic stainless steel seamless pipe supply sources include imported stainless steel scrap and stainless steel scrap selected from imported waste equipment and shredded materials (commonly known as foreign metal waste). The production of stainless steel seamless pipes and the dust, waste residue and pickling mud recovered during the manufacturing process also contain a certain amount of stainless steel scrap resources.