Luohe Yuncheng 20G high pressure boiler tube manufacturing process essence is mainly good steel pipe grades: 20, 20 20Mn 25Mn 15CrMo 12Cr2Mo 12Cr1MoV 12Cr2MoWVTi 10Cr9Mo1VNb, SA210A SA210 SA213 T SA213 T SA213 T2 SA213 T2 SA213 T9 SA213 T9 ST4 8 / Ⅲ, 15Mo 13CrMo4 10CrMo910, etc. Tolerance: steel pipe type outer diameter (D) wall thickness (S) quality department Caohejing Cheng 2 186 8 237 welcome to call 1 basic content click to view Ulanchabu GB13296-2007 (stainless steel pipe for boilers and heat exchangers). It is mainly used in boilers, superheaters, heat exchangers, condensers, and catalytic tubes of chemical companies. Used for high temperature, high pressure and corrosion resistant steel pipes. Its representative materials are 0Cr18Ni 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, and so on. Classification of product survey steel pipes: Steel pipes are divided into two types: seamless steel pipes and welded steel pipes (seamed pipes). According to the cross-sectional shape, it can be divided into round pipes and special-shaped pipes. Round steel pipes are widely used, but there are also special-shaped steel pipes such as square, rectangular, semi-circular, angular, equilateral, and angular. For steel pipes subjected to fluid pressure, hydraulic tests are performed to check their pressure resistance and quality. They do not occur under the specified pressure, or they are qualified. Some steel pipes also need to be crimped and flared according to the standards or the requirements of the buyer. , Crush test, etc. Luohe Tancheng 20G High Pressure Boiler Tube Manufacturing Process Essence Boiler tube refers to steel that is open at both ends and has a hollow cross-section, whose length is larger than that of the surrounding steel. It can be divided into seamless steel pipe and welded steel pipe according to its specifications. (Such as outer diameter or side length) and wall thickness indicate that its size ranges from a capillary with a small diameter to a large-diameter tube with a diameter of several meters. Steel pipes can be used in pipelines, thermal equipment, machinery industry, petroleum geological exploration, containers, chemical industry and special applications. 1 Basic knowledge classification Steel pipes are divided into two categories: seamless steel pipes and welded steel pipes (seamed pipes). According to the cross-sectional shape, it can be divided into round pipes and special-shaped pipes. Round steel pipes are widely used, but there are also special-shaped steel pipes such as square, rectangular, semi-circular, angular, equilateral, and angular. For steel pipes subjected to fluid pressure, hydraulic tests are performed to check their pressure resistance and quality. They do not occur under the specified pressure, or they are qualified. Some steel pipes also need to be crimped and flared according to the standards or the requirements of the buyer. , Crush test, etc. The German steel number corresponding to the T91 steel in the marketing department is X10CrMoVNNb9, the Japanese steel number is HCM9, and the French steel number is TUZ10CDVNb0901. product line
Luohe Tancheng 20G high pressure boiler tube manufacturing process essence N 0.03-0.07 180 ° bending test: D = 2a (thickness below 16mm Q345 alloy tube is a kind of high strength, good comprehensive performance, long service life, wide application range, economical, etc. Silicon-manganese alloy steel. This steel is rolled into plates, profiles, seamless steel pipes, etc., and is widely used in bridges, ships, boilers, vehicles and important building structures. Q345 alloy pipe belongs to the low alloy series ---- low Alloy high-strength structural steel (GB / T1591-199. The lower limit of smelted manganese content of 08 steel killed steel is 0.25%, silicon content is not more than 0.03%, aluminum content is 0.02% -0.07%. At this time, the steel number is 08A1. Elongation after breaking In the tensile test, the percentage of the length of the gauge after the specimen is broken and the length of the original gauge is called the elongation. It is expressed as σ and the unit is%. The formula is: L1--gauge length after the sample is broken, mm; L0--original gauge length of the sample, mm. Caohejing City GB / T14976-2002 (stainless steel seamless steel pipe for fluid transportation). It is mainly used to transport corrosive Medium pipes. Representative materials are 0Cr 0Cr18Ni 1Cr18Ni9Ti, 0Cr17N i12Mo 0Cr18Ni12Mo2Ti, etc. The scope of power boiler tubes is mainly used for superheater tubes, reheater tubes, air ducts, main steam tubes, etc. of high pressure and ultra high pressure boilers. The line pipe is delivered to the oil and gas industry enterprises. The line pipe includes two kinds of seamless and welded pipes. Luohe Yuncheng 20G high pressure boiler pipe has dimensional tolerances. The pipe ends are flat ends, threaded ends and socket ends. Head welding, coupling connection, socket connection, etc. The pipe is mainly made of steel grades such as X4, X5, X6, X70. Casting brilliant Bayin boiler pipe refers to the steel that is open at both ends and has a hollow section, and its length is larger than the surrounding steel , Luohe Tancheng 20G high-pressure boiler tube manufacturing process can be divided into seamless steel pipes and welded steel pipes according to the good, the specifications of steel pipes are expressed by the external dimensions (such as outer diameter or side length) and wall thickness, and its size range is wide, from the diameter Small capillaries up to large diameter pipes with diameters of several meters. Steel pipes can be used for pipes, thermal equipment, machinery industry, petroleum geological exploration, containers, chemical industry and special applications. Luohe Tancheng 20G high pressure boiler tube The shrinkage ratio (ψ) of the essence of the manufacturing process is good. New quotation Among the currently applied palladium alloys, silver accounts for about 20-30%, and the content of other components (such as gold) is <5%. The rate and temperature of hydrogen through the palladium alloy, The thickness of the membrane is related to the pressure difference (P) between the raw hydrogen and the pure hydrogen on both sides of the membrane. Increasing the temperature, increasing P, and decreasing the thickness of the membrane will increase the hydrogen transmission rate. However, increasing the temperature will make the The tensile strength of the permeable membrane is reduced. Therefore, the operating temperature of the palladium tube is usually around 450 ° C. Certain impurities can cause palladium poisoning, degrade the breathability, and even expose the membrane. The substances that can cause palladium poisoning are: , Arsenide, halide, oil vapor, sulfur and ammonia-containing substances, and dust. Palladium alloy can be made into a tube (called a palladium tube) or a diaphragm (called a palladium film). Quality Assurance
Luohe Tancheng 20G high-pressure boiler tube manufacturing technology essence alloy steel pipes imported from Germany, steel grades are mainly 34CrMo4 and 12CrMoV. This kind of steel pipe has good high temperature performance and is often used as a high temperature boiler steel pipe. The homepage recommendation overview is good: the normal temperature of boiler steel pipe is below 350 ℃, and domestic pipe is mainly made of hot rolled or cold drawn steel with 10 # and 20 # carbon steel. Requirements Ni ≤ 0.40 Folding chemical inspection Boiler tube Boiler tube "Seamless steel tube for low and medium pressure boilers" stipulated. The chemical composition test is in accordance with the relevant parts of GB222-84 and GB223 "Chemical Analysis of Steel and Alloys". Inspection standard GB5310-95 "Seamless Steel Pipe for High Pressure Boilers" stipulates. Tensile test, hydraulic test and flattening test are the same as GB3087-82; impact test is GB229-9, flaring test is GB / T242-9, grain size test is YB / T5148-9, and microscopic test is GB13298- 9, decarburization layer test according to GB224-8, ultrasonic test according to GB / T5777-96. Folding cross-section shrinkage In tensile tests, the percentage of the cross-sectional area at the reduced diameter of the specimen after the sample has been broken off and the percentage of the original cross-sectional area is called the cross-section shrinkage. Expressed in ψ, the unit is%. The calculation formula is as follows: In the formula: S0--the original cross-sectional area of the sample, mm; S1--the small cross-sectional area at the reduced diameter of the sample after breaking, mm.