Can the 8163 steel pipe be used in boilers?

GB8163 steel pipes are seamless pipes used for fluid transportation (GB/T8163-1999); they are general-purpose seamless pipes employed for transporting fluids such as water, oil, and gas. Production methods: ① Ordinary boiler pipes are used at temperatures below 450°C, and domestically produced pipes are mainly manufactured from hot-rolled or cold-drawn carbon structural steel of grades 10 and 20. 　　②High-pressure boiler tubes are often exposed to high temperatures and pressures during use, and under the influence of hot flue gases and steam, they suffer from oxidation and corrosion. The steel pipe is required to have high endurance strength, excellent resistance to oxidation and corrosion, as well as good microstructural stability. 　　(2) Uses: ① General boiler tubes are mainly used to manufacture water wall tubes, feed water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small flue tubes, as well as arch brick tubes, etc. 　　②High-pressure boiler tubes are primarily used to manufacture superheater tubes, reheater tubes, guide tubes, main steam tubes, and other components for high-pressure and ultra-high-pressure boilers. The manufacturing process for GB8163 steel tubes involves the following steps: tube billet – inspection – peeling – inspection – heating – piercing – pickling – grinding – lubrication and air drying – welding – cold drawing – solution treatment – pickling – pickling and passivation – inspection – cold rolling – degreasing – end trimming – air drying – internal polishing – external polishing – inspection – labeling – final packaging of the finished products. GB8163 steel tubes can be classified into different types based on their manufacturing methods, including hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, and extruded tubes. 　　1.1 Hot-rolled seamless pipes are generally produced on automatic tube rolling mills. The solid tube billet is inspected to remove surface defects, cut to the desired length, centered on the end face at the piercing end, then sent to a heating furnace for heating, and pierced using a piercing machine. While perforating, it rotates and moves forward continuously; under the action of the rolls and die heads, a cavity gradually forms inside the tube blank, known as the billet. It is then sent to the automatic tube rolling machine for further rolling. Finally, the wall thickness is uniformized using a leveling machine, and sizing is carried out with a sizing machine to meet the specified requirements. Using a continuous tube rolling mill to produce hot-rolled seamless steel tubes is a relatively advanced method. 　　1.2 To obtain seamless tubes with smaller dimensions and better quality, cold rolling, cold drawing, or a combination of both methods must be employed. Cold rolling is usually carried out on two-roll mills, where the steel tube is rolled in an annular die formed by a variable-diameter circular hole and a stationary conical die head. Cold drawing is usually carried out on single-chain or double-chain cold drawing machines with a capacity of 0.5 to 100 T. 　　1.3 The extrusion method involves placing the heated tube billet inside a sealed extrusion cylinder; the piercing rod moves together with the extrusion rod, thereby forcing the extruded product out through a smaller die hole. This method can produce steel pipes with a smaller diameter.

How can strength calculations be carried out without the basic allowable stress for 8163? How to determine its safety?

During the design phase, 8163 was considered; since it does not have a basic allowable stress, how should strength calculations be carried out, and how can its safety be determined?

For boilers, 3087 is superior to 8163. For pressure pipelines, 8163 is superior to 3087. 3087 is only used for 10# and 20# steels, while 8163 is applicable to a wider range of steel grades. Moreover, the factory hydrostatic test pressure is 10 MPa for 3087 and 19 MPa for 8163. In GB/T8163, 10 and 20 steels are applicable only to boilers with a rated outlet hot water temperature of less than 120 degrees. If there is no new standard, it means it cannot be used in boilers.

In GB/T8163, 10 and 20 steels are applicable only to boilers with a rated outlet hot water temperature of less than 120 degrees. Where does it come from? Standards? Standard?

It can be used; TSG G0001 specifies the application range for 8163 steel pipes.