316L stainless steel pipeFeatures, performance and application

National standard thickness of stainless steel pipe. Stainless steel pipe is a brand of stainless steel produced according to American ASTM standards. Before the national standard thickness of stainless steel pipe, there are stainless steel pipe national standard thickness national standard wall thickness table product name specification material price (yuan ton) rise and fall welded pipe 6 points 5mm (& phi; 275mm) 3850 + 30 welded pipe 1 inch 0mm (& phi; 330mm)

Cold rolled steel strip shall be delivered in the state of heat treatment (annealing, normalizing and tempering after normalizing), and shall be delivered smoothly.

.Crimping: during crimping, the convex part of the pipe fitting is placed in the concave groove of the die, and the jaw is perpendicular to the pipe axis.

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.

.For the length of welding arc, 2 ~ 4mm is better for ordinary steel welding, and ~ 3mm is better for stainless steel welding. If it is too long, the protection effect is not good.

The steady creep rate is usually used to evaluate the long-time creep performance of materials. For the application of long-life materials, the steady-state creep rate of stainless steel pipe under high temperature and stress is the key index of the material, and can be extrapolated. The following are the test results of stainless steel pipe under different test conditions. The results show that the steady-state creep rate of stainless steel pipe sample is in the order of magnitude after creep at 550 ℃ (90mpa600 ℃ (85mpa) for 500h; when the temperature condition increases to 650 ℃ (the stress decreases to 70MPa), the creep performance of stainless steel pipe sample is good, and the steady-state creep rate is in the order of magnitude; when the temperature further increases to 700 ℃ (the temperature creep rate of 65mpa stainless steel pipe sample increased to 800 ℃ (65mpa steady-state creep rate reaches the maximum value under several test conditions, and creep fracture occurs. See for the change of steady-state creep rate of stainless steel pipe sample under several conditions. When the temperature increases, the material maintains a low level of creep rate. Under 650 ℃ 70MPa s creep deformation rate does not increase, which shows little influence on the temperature and stress, and creep fracture occurs under this condition Compared with several other common structural materials, it can be seen that the creep performance of several materials is better than that of ordinary materials under all test conditions. After 500 hours of test, the total strain does not exceed 0.12%. The curve is relatively stable and the fluctuation is small, indicating that the test data is stable and reliable. Stainless steel pipes are widely used because of their excellent corrosion resistance It is widely used in petrochemical industry,Stainless steel pipe products, pipeline transportation and other working conditions with strong corrosive media. The main reason for the corrosion resistance of stainless steel pipes is the addition of a large number of elements CrNi, and Cr is the main element determining the corrosion resistance of stainless steel pipes. The electrode potential of stainless steel pipes jumps with the increase of Cr content. However stainless steel pipes are in the subsequent heat treatment During the treatment, Cr element will precipitate into the matrix in the form of carbide. On the one hand, the hardness of Cr carbide is larger than that of the matrix, and the service wear process can improve the wear resistance of stainless steel pipe. On the other hand, the precipitation of Cr containing carbide will lead to Cr Element dilution zone in some parts of the matrix, increase the number of batteries of the material, reduce the electrode potential of stainless steel pipe and reverse the corrosion Therefore, in order to obtain good corrosion and wear resistance, the combination of mechanical properties and corrosion resistance of stainless steel pipe materials needs to be considered. At present, some scholars have studied the effects of austenitizing temperature and time, tempering temperature and time on the mechanical properties of stainless steel pipe by heat treatment to change the corrosion resistance of stainless steel pipe And corrosion resistance, it is found that austenitizing temperature can change mechanical properties, but has little effect on corrosion performance, It is concluded that low-temperature nitriding forms a diffusion layer on the surface of the material, improves the wear resistance of the material, interacts with Cr and chemically stable phase 07-fe3n to improve the corrosion resistance of the material.

The steady creep rate is usually used to evaluate the long-time creep performance of materials. For the application of long-life materials the steady-state creep rate of stainless steel pipe under high temperature and stress is the key index of the material, and can be extrapolated. The following are the test results of stainless steel pipe under different test conditions. The results show that the steady-state creep rate of stainless steel pipe sample is in the order of magnitude after creep at 550 ℃ (90mpa600 ℃ (85mpa) for 500h; when the temperature condition increases to 650 ℃ (the stress decreases to 70MPa), the creep performance of stainless steel pipe sample is good, and the steady-state creep rate is in the order of magnitude; when the temperature further increases to 700 ℃ (the temperature creep rate of 65mpa stainless steel pipe sample increased to 800 ℃ (65mpa steady-state creep rate reaches the maximum value under several test conditions, and creep fracture occurs. See for the change of steady-state creep rate of stainless steel pipe sample under several conditions. When the temperature increases, the material maintains a low level of creep rate. Under 650 ℃ 70MPa, s creep deformation rate does not increase, which shows little influence on the temperature and stress, and creep fracture occurs under this condition Compared with several other common structural materials, it can be seen that the creep performance of several materials is better than that of ordinary materials under all test conditions. After 500 hours of test, the total strain does not exceed 0.12%. The curve is relatively stable and the fluctuation is small, indicating that the test data is stable and reliable. Stainless steel pipes are widely used because of their excellent corrosion resistance It is widely used in petrochemical industry, pipeline transportation and other working conditions with strong corrosive media. The main reason for the corrosion resistance of stainless steel pipes is the addition of a large number of elements CrNi, and Cr is the main element determining the corrosion resistance of stainless steel pipes. The electrode potential of stainless steel pipes jumps with the increase of Cr content. However, stainless steel pipes are in the subsequent heat treatment During the treatment, Cr element will precipitate into the matrix in the form of carbide. On the one hand, the precipitation of Cr containing carbide will lead to Cr Element dilution zone in some parts of the matrix, reduce the electrode potential of stainless steel pipe and reverse the corrosion Therefore, in order to obtain good corrosion and wear resistance, the combination of mechanical properties and corrosion resistance of stainless steel pipe materials needs to be considered. At present, some scholars have studied the effects of austenitizing temperature and time, tempering temperature and time on the mechanical properties of stainless steel pipe by heat treatment to change the corrosion resistance of stainless steel pipe And corrosion resistance, it is found that austenitizing temperature can change mechanical properties, but has little effect on corrosion performance, while tempering temperature has a great effect on the corrosion resistance of materials. Appropriate austenitizing temperature and tempering temperature can improve the corrosion and wear resistance of materials. Some scholars use surface treatment to improve the corrosion and wear resistance of materials, It is concluded that low-temperature nitriding forms a diffusion layer on the surface of the material, improves the wear resistance of the material,304 stainless steel pipe price, performance and application' >

Stainless steel pipe national standard thickness in the stainless steel pipe industry, the steel that meets the national standard is generally called & ldquo; National Standard & rdquo; Inferior steel that does not meet national standards is called & ldquo; Winning the bid& ldquo; Non standard & rdquo; In practical application, the quality of national standard and non-standard is similar, mainly due to the difference in thickness. A thickness of national standard is actually 1mm, but a thickness of non-standard is actually only 0.8mm or other thickness less than 1mm. Non-standard is basically equivalent to winning the bid. Standard index size (323mm) label number standard implementation standard gbt14976-2012 non-standard specific thickness ratio outer diameter steel pipes are produced according to the standard. 2 non-standard belongs to customized difference. Wood office says ha ha customized on demand. 3 thickness area: the difference between standard, thickened, stainless steel American Standard and national standard mainly lies in C content and P content; The C content and P content of Chinese standards are lower than those of American Standard ASTM A312@_@ The two important elements of material are chromium and nickel 15 9 large plants and 18 8 large plants of national standard and 18 8 small plants of American Standard 132@_ @ The national standard contains more than 17 chromium and the American Standard contains more than 18 chromium@_@ Stainless steel pipe is an American Standard, not in the national standard. The corresponding national standard is 06cr19ni10.

The bright nickel layer on the stainless steel pipe is a silver white metal with slight yellow light. Its hardness is higher than that of copper, zinc, tin, cadmium, gold and silver but lower than that of chromium and rhodium. Bright nickel has high chemical stability in air and good stability to alkali. Using Brightener on stainless steel pipe, so as to improve the hardness, wear resistance and leveling of the surface, make the appearance of stainless steel pipe consistent with other nickel plated parts, and avoid the corrosion of potential difference between stainless steel pipe and other bright nickel. After using bright nickel solution for a period of time, due to the of brightener

Stainless hot plate (grade I) GB4239-91 stainless cold strip (grade I)

ranking.Process performance inspection: flattening test, tensile test, impact test, flaring test, hardness test, metallographic test, bending test and nondestructive testing (including eddy current testing, X-ray testing and ultrasonic testing).

Stainless steel pipe will rust? Stainless steel pipe is a food grade stainless steel pipe recognized by the state. It is not absolutely non rusting, but it is not easy to rust compared with other steel grades. Many people will think that the stainless steel pipe is not rusty, especially the stainless steel pipe has high nickel content, which is more difficult to rust. If it is rusty, they will doubt whether it is fake, whether it will be replaced by 201 stainless steel pipe, or there is a problem with the raw materials of the steel strip. In fact, these questions and judgments are one-sided views on the lack of understanding of stainless steel pipes. Stainless steel pipes may also produce rust and rust spots under certain conditions.

D-outer diameter (mm) as stainless steel pipe for reprocessing device, in order to reduce carbon content by vigorously welding chromium carbon compounds at affected parts, or silicon and phosphorus content in Nb steel. In addition, in order to improve the corrosion resistance of ULC steel, the steel industry with phosphorus content below 0.015% is manufactured. After 20 times of 65% boiling corrosion test, it is found that if the corrosion degree of the solution treated material is less than 0.1mm/a, 650 ℃ & times; The sensitized material for 2h has excellent corrosivity when the corrosion degree is less than 0.2mm/a.

Stainless steel water supply pipe is a healthy, sanitary and energy-saving water pipe, whether it is for household or large engineering buildings

Industry management.2. Raw material problem of stainless steel pipe. If the hardness is too low, it is not easy to polish (BQ is not good). If the hardness is too low orange peel is easy to appear on the surface during deep drawing, which affects BQ performance. BQ with high hardness is relatively good.

The surface resistance is less than 1000mb; Wear protection; Scalable; Excellent chemical resistance; Good alkali metal and acid resistance; Strong toughness; Flame retardant.

Stainless steel water supply pipe is a healthy, economic, sanitary and energy-saving water pipe, whether it is for household or large engineering buildings

.For the steel pipes bearing fluid pressure, hydraulic test shall be carried out to test their pressure resistance and quality. If there is no leakage under the specified pressure, or they are qualified. Some steel pipes shall also be subject to crimping test, flaring test and flattening test according to the standard or the requirements of the demander.

It is a kind of product manufacturing enterprise. It has long been specialized in L stainless steel pipe, s stainless steel pipe and 904L stainless steel pipe. Therefore, the specification of a group of slightly larger formed pipes used in the production of pipe molds is about 6000-20000.

The specification and appearance quality shall comply with the provisions of gb14975-2002 stainless steel seamless steel pipe. The steel pipe is usually 5 ~ 10m long (indefinite length) hot rolled steel pipe,20 large diameter seamless steel pipe, and the hot-rolled steel pipe is equal to or greater than 1m. The wall thickness of cold drawn (rolled) steel pipe is 0.5 ~ 0mm, 0 ~ 7m; the wall thickness is greater than 0mm, 5 ~ 8m.