In conclusion, which can be used in the project budget.
L stainless steel pipe is a kind of hollow long round steel, which is mainly used for industrial transmission pipelines and mechanical structural components such as petroleum, chemical industry, medical treatment, food, light industry, machinery and instruments etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in all kinds of manufacturing mechanical parts and engineering structures.
.Model 309 & mdash; It has better temperature resistance.
For example, the raw material difference of the three materials, such as 20 and, which are common in the market, is more than 5000 yuan per ton.
. 302— The corrosion resistance is the same, and the strength is better because the carbon content is relatively high.
Selection process of stainless steel pipe water supply pipe.
After the pipeline is installed and the pressure test is qualified, it is better to wash with low chloride ion water and disinfect with 0.03% potassium permanganate.
Fabrication of stainless steel pipe
Application fields: chemical industry, construction industry.
Seamless steel pipe belongs to the category with relatively high added value among steel pipe products, and the products involved in this case belong to the medium and high-end products of stainless steel pipe. According to incomplete statistics, in 2010, China exported about 20000 tons of stainless steel pipes to the EU, accounting for about 13% of the total exports of stainless steel pipes that year.
offer. 303— Add a small amount of sulfur and phosphorus to make it easier to cut.
However, stainless steel is relative, and it is just ordinary stainless steel. It's better not to use it in a particularly polluted environment. You can rest assured to use stainless steel pipes in your daily life.
The heat-treated alloy should be 1900 DEG at low temperature; Annealing treatment at the temperature of F, then rapid cooling and water quenching. This treatment is applied to solid melt annealing and stress relief. Stress relief treatment, such as below 1900 DEG; F, which is easy to lead to the precipitation of harmful metal or non-metallic phases.
Basic weight (density) / kg of steel plate: SPCC & mdash& mdash; Cold rolled carbon steel sheet and strip are generally used, add t at the end of the brand as spcct.
Total quality management.The allowable depth of stainless steel straight track is also required. For hot-rolled and hot-rolled steel pipes, stainless steel pipes with diameter less than or equal to 140mm and not greater than 5% of the nominal wall thickness the large depth is less than or equal to 0.5mm, cold drawn (rolled) stainless steel pipes are not greater than 4% of the nominal wall thickness, and the large depth is less than or equal to 0.3mm.
Deformation strengthening of austenitic stainless steel stainless steel has good cold deformation performance. It can be cold drawn into very thin steel wire and cold rolled into very thin steel strip or steel pipe. After a large amount of deformation, the strength of the steel is greatly improved, especially when rolling in the subzero temperature zone. The tensile strength can reach more than 2000 MPa. This is because in addition to the cold hardening effect, there are also superimposed Deformation induced M transition.
6 Density 400 & rdquo; Density of series: 93310s, 309S and 316316 density stainless steel coils of 30323042001 are divided into Austenitic ferrite, martensite, duplex (ferrite austenite) stainless steel cold rolled coil and stainless steel hot rolled coil.
.Stainless steel coil is widely used in chemical industry, food, medicine,304 stainless steel pipe fittings, papermaking, petroleum,430F stainless steel plate, atomic energy and other industries, as well as various parts of buildings, kitchenware, tableware, vehicles and household appliances. 304 stainless steel coil is divided into austenitic stainless steel cold rolled coil and stainless steel hot rolled coil. 304 stainless steel (coil) plate features: beautiful surface and diversified use possibilities; Good corrosion resistance; Longer and more durable than ordinary steel; Good corrosion resistance; High temperature oxidation resistance and high strength, so it can resist fire; Good plasticity and welding performance. It has excellent rust and corrosion resistance good intergranular corrosion resistance and good processing performance.
Check the clamping forming effect after each clamping, and there shall be no clamping in place or serious depression of pipe clamping. According to visual inspection, the pipe fitting end and the pipe are tightly bonded. The smaller the diameter of the diamond edge of the pipe fitting above DN25 is slightly smaller than the outer diameter of the pipe, ranging from 0.1-2mm. The larger the pipe diameter, the greater the difference.
In the grades of Japanese steel (JIS Series), ordinary structural steel is mainly composed of three parts, which represent the material,304 thin wall stainless steel pipe, such as s (steel) represents steel and f (ferrum) represents iron; The second part represents different shapes, types and uses, such as P (plate) represents plate, and K (kogu) represents tool; The third part represents the characteristic number, which is generally low tensile strength. For example: SS400 & mdash& mdash; One s represents steel, and the second s represents & ldquo; Structure & rdquo; (structure), 400 is the lower limit tensile strength of 400MPa, and the whole represents ordinary structural steel with tensile strength of 400MPa.