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Categories and Applications of Stainless steel pipe
The classification of stainless steel pipe
As per production methodsSeamlesscold-tensile pipe, squeezing pipe, cold-rolled pipe.Welding pipeAs per processgas protecting welded pipe, electric arc welded pipe, ERW pipehigh frequencylow frequency.As welding seamstraight seam welded pipespiral welded pipe.As per section shape1round steel pipe2rectangular steel pipe.As per wall thicknessthin wall pipethick wall pipeAs per application1civil pipes are divided into round pipe, rectangular pipe, checkered pipe; generally used for decoration, building, structural ect.Industrial pipe: industrial pipe for pipinggeneral pipe for piping(drinking water pipe), mechanical construction/liquid transfer pipe, boiler heat exchange tube, food hygiene pipe ect. It is generally used in each field of industry: such as petro chemistry, papermaking, nuclear energy, food, drink, medicine ect, where the pipe is required comparative high liquid medium.Seamless steel pipe Stainless seamless steel pipes are strip steels which are of hollow section and no seam around the side.1.The manufacturing process and whole operation. of seamless steel pipemeltingingotrolled steel,cuttingpeelingperforationannealingpicklingtrowelingcold tensilecutting leftoverpicklingstorage2. The features of seamless pipe:From the above process operation, we can easily find that: 1. the thicker wall thickness of the product is, the more economic and practical the product possess; the thinner wall thickness of the product is, the more substantial the processing cost increases. 2. The process of the product decides its limitation. The general seamless steel pipes are low accuracy, uneven wall thickness, low brightness of surface within the pipe, high sizing cost, and pits and black points which are not easy cleared away on the inside and outside surface. 3. Its check and forming must be through off-line treatment. Therefore, it presents its superiority in the aspects of high pressure, high strength, mechanical structural.
Welded Pipe Welded pipe is the steel pipe that is welded after rolled by steel plate or steel strip through mill and mold. 1. Steel plateslittingformingwelding induction bright heat treatmentinside and outside the weld-track processingformingsizingeddy testinglaser testing diameterpicklingstorage 2. The features of welded pipe: From the above process operation, we can easily find that: 1. The product is continually on-line production, the thicker wall thickness of the product is, the bigger the machine and welding equipment investment is, then it is not economic and practical; the thinner wall thickness of the product is, the lower the ratio of input and output is. 2. The process of the product dominates its advantages and disadvantages. The general seamless steel pipes are high accuracy, even wall thickness, high brightness of surface within the pipe( the surface level of steel plate decides steel surface brightness), random sizing, Therefore, it presents its economical and beauty-appearance properties about the application aspects of high accuracy and medium and low pressure liquid.Stainless SUS304-0Cr18Ni9
The introduction of material property and application in stainless steel
Being as the basic grade of austenite, corrosive resistance, heat resistance, low temperature strength, mechanical properties are excellent. There is no hardening occurred after heat-treatment and hardly magnetism.
The features and practical application
distinguish | SUS304L | |
Features | --the basic grade of austenite; widest application.--corrosive resistance and heat resistance are excellent.--low temperature strength and mechanical properties are excellent.--Single-phase austenite, there is no heat treatment hardening phenomenon. | --Compared 304, the corrosive resistance is excellent. |
Application | --Tableware of class 1,2exterior material, architectural material, vehicle parts. -- Medical Devices, chemical industry, food technology, fiber industry.--vessel parts | --The equipment in chemical, coal, petroleum industries require high intergranular corrosion resistance-- Architectural material, heat resistant parts and hardly heat treatment parts. |
Chemical CompositionUnitwt%)
Specification | C | Si | Mn | P | S | Cr | Ni |
TYPE304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | ≤18.0-20.0 | ≤8.0-10.5 |
TYPE304L | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | ≤18.0-20.0 | ≤8.0-10.5 |
Mechanical properties
Specification | YSMpa | TSMpa | EL% | Hv |
TYPE304 | ≥205 | ≥520 | ≥40 | ≤200 |
TYPE304L | ≥175 | ≥480 | ≥40 | ≤200 |
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