630 stainless 
1018 stainless
Check whether the sealing ring of pipe fittings is complete and clean and whether the placement position is correct. If there is dirt, it must be cleaned up. If the sealing ring is damaged, it must be replaced again.
.The bearing capacity of decorative stainless steel pipe ice load is the main control load of offshore platform in severe cold area, which has high requirements for the shear bearing capacity of jacket leg of offshore platform. In order to study the factors affecting the shear capacity of the jacket legs of the stainless steel pipe in pipe concrete-filled steel tubular offshore platform, a total of 18 concrete-filled steel tubular shear members were fabricated to study the effects of outer steel pipe material, concrete strength, void ratio and shear span ratio on the shear capacity of concrete-filled steel tubular in pipe. It is found that the shear strength of members increases with the decrease of void ratio and the increase of concrete strength; The larger the shear span ratio, the smaller the shear strength. Combined with the test, the empirical formula of shear capacity of concrete-filled steel tubular in pipe is proposed, which is analyzed and verified by ABAQUS finite element modeling software. The results show that the simulation is in good agreement with the test results. In order to study the axial compression performance of stainless steel tube concrete conduit leg and the axial compression performance of stainless steel concrete conduit leg, experiments are used to verify the correctness of the finite element model. The load displacement curves of 19 specimens in 5 groups were compared, concrete strength, diameter thickness ratio and bone index on the axial compression performance of concrete-filled stainless steel tubular short columns under axial compression were analyzed. The results show that with the increase of concrete strength, the bearing capacity of specimens increases, but the ductility of specimens decreases; With the increase of void ratio and diameter thickness ratio, the bearing capacity of the specimen decreases; The bearing capacity of stainless steel tube concrete can be effectively improved by adding steel bone; Increasing the bone matching index of steel bone can improve the bearing capacity of the specimen. A compound forming process of double-layer stainless steel pipe for primary circuit main pipeline of station is designed, which solves the problem of limited length of finished products in traditional forging or casting process, stress-strain field and temperature field of double-layer stainless steel pipe were analyzed,Environmental protection stainless steel belt, and the optimal deformation parameter combination was obtained by orthogonal test. The simulation results show that in the process of three roll cross rolling, the large values of equivalent stress, equivalent strain and temperature are concentrated in the area between the outer tube and the roll, and the overall performance parameters of the outer tube are greater than those of the inner tube. The range analysis and variance analysis of orthogonal design test show that the optimal deformation parameter is rough rolling temperature 1100 deg; C. Feed angle 8 & deg;, Roll speed: 200rmin. Objective to improve the existing connection mode of the braking system pipe system of railway freight cars, and accurately shape the end of the stainless steel pipe, so as to obtain the forged joint with better mechanical properties. According to the connection mode of the original pipe system and the plastic forming characteristics of steel pipe, a multi-step upsetting and extrusion process for the end of stainless steel pipe is proposed. The process is numerically simulated by DEFORM-3D three-dimensional finite element simulation software, and the forging forming process is analyzed
In addition,Stainless steel plate 2080 plate, its service time, quality and stiffness should be considered, and the strength requirements of the plate under pressure should be considered; Thermal conductivity; Distribution of pressure and format specification of pressing plate.
.(V) the profitability of the steel plant has declined month by month. In the first half of 2013, the metallurgical industry realized a profit of 73.9 billion yuan, a year-on-year increase of 7%, of which the ferrous metal smelting and rolling processing industry realized a profit of 45.4 billion yuan, the profitability of key large and medium-sized iron and steel enterprises was far lower than the overall level of the industry and showed a downward trend month by month. Although the profit increased by 34%, it was only 2.8 billion yuan, with a profit margin of 0.19%. In May, 86 key large and medium-sized iron and steel enterprises realized a profit of only 500 million yuan, falling month on month for five consecutive months, of which 34 suffered losses, with a loss surface of 40%.
301— Good ductility, used for molding products. It can also be machined to harden rapidly. Good weldability. The wear resistance and fatigue strength are better than those of stainless steel.
It has excellent stress corrosion cracking resistance. Even duplex stainless steel with low alloy content has higher stress corrosion cracking resistance than austenitic stainless steel, especially in the environment containing chloride ions. Stress corrosion is a prominent problem that ordinary austenitic stainless steel is difficult to solve.
Cutting tool level & rdquo; Martensitic steel, an early stainless steel similar to Brinell high chromium steel. It is also used for surgical tools, which can be made very bright.
Stainless steel seamless steel pipe for fluid transportation (instead of gbt14976-2002 instead of gbt14976-1994 instead of gb2270-1980)
As long as it is a socket connected stainless steel wire, buttress must be set through calculation.
Pursuit of excellence.400 series & mdash; Ferritic and martensitic stainless steel.
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.
Low temperature embrittlement --- in low temperature environment, the deformation energy is small. In the low temperature environment, the phenomenon that the elongation and area shrinkage decrease is called low temperature embrittlement. Most of them are produced on the body centered cubic structure of ferrite series.
SPCC stainless steel belt is simply an extension of ultra-thin stainless steel plate. It is mainly a narrow and long steel plate produced to meet the needs of industrialized production of various metal or mechanical products in different industrial sectors.
Product range.）
Stainless steel grade group 200 Series & mdash; Chromium nickel manganese austenitic stainless steel 300 series & mdash; Chromium nickel austenitic stainless steel model 301 & mdash; Good ductility, used for molding products. It can also be machined to harden rapidly. Good weldability. The wear resistance and fatigue strength are better than those of stainless steel.
The external anti-corrosion coating of stainless steel shall be galvanized and epoxy asphalt coating or coating with higher requirements according to the soil conditions of the pipe laying ground.
.The welding alloy has good weldability. Professional stainless steel plate, stainless steel coil, stainless steel belt, stainless steel pipe, large quantity, high quality and low price. Fire resistance - Waterproof - high temperature resistance, strong and durable, safe and reliable. The performance of the alloy is that the welding metal and heat deteriorated part still maintain the same corrosion resistance, strength and toughness as the base metal. It is not difficult to weld, but its welding procedure needs to be designed so that after welding, it can maintain a good phase balance and avoid the precipitation of harmful metal phase or non-metal phase. Welding can be carried out in the following equipment: GTAW (TIG); GMAW (MIG);SMAW (“stick” electrode); SAW;FCW;And paw stainless steel features: compared with L and 317L austenitic stainless steel, duplex stainless steel alloy has superior performance in spot corrosion and crack corrosion resistance. It has high corrosion resistance. Compared with austenite, it has lower thermal coefficient and higher thermal conductivity.
Remarks: to ensure the nickel content of stainless steel strip and the mechanical properties of stainless steel strip material certificate (Baogang material), Japan Nippon Steel Material Certificate (Nippon Steel material) SGS report, hydraulic test shall be carried out to test their pressure resistance and quality. If there is no leakage under the specified pressure etc. can be provided.
For the steel pipes bearing fluid 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.