Wall thickness
1018 stainless
304ti stainlesL stainless steel pipe has become a very popular material in the market because of its many advantages. Today, Xiaobian will tell you in detail about L stainless steel pipe installation technology.
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.
.Some reasons for product composition ratio: in order to reduce the production cost, reduce the proportion content of some important elements such as chromium and nickel, and increase the content of other elements such as carbon. This production phenomenon that the composition ratio is not strictly in accordance with the product model and product characteristics not only greatly reduces the product quality, for example, when the chromium content of stainless steel pipe is insufficient, equipment and production industries. At the same time, the performance and type of hot press such as manual operation or automatic operation, and the quality requirements for materials, such as hardness, gloss, etc. Economic accounting should also be considered. Each time the steel plate is newly polished, it is required to produce a number of decorative plates with slow quality.
.Manufacturing process hot rolling (seamless steel pipe): round tube blank → Heating → Perforation & rarr; Three roll cross rolling continuous rolling or → Off pipe & rarr; Sizing (or reducing) → Cooling → Straightening & rarr; Hydrostatic test (or flaw detection) → Mark & rarr; The raw material for warehousing and rolling seamless pipe is round pipe blank. The round pipe blank shall be cut and processed by cutting machine, and the blank with a growth of about 1m shall be brought to the furnace for heating. The billet is sent to the furnace for heating at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature in the furnace is the key problem. After the round tube billet is discharged from the furnace, it should be pierced through the pressure piercer. Generally, the more common piercer is the cone roll piercer. This piercer has high production efficiency and good product quality. It is specialized in stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe, with high pressure resistance grade, good waterproof performance, fire and high temperature resistance, strong overload capacity, corrosion resistance, radiation protection, long service life, large perforation diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively rolled by three roll cross rolling, continuous rolling or rolling. Take off the pipe after sizing. The conical drill bit of the sizing machine rotates into the steel embryo at high speed to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the sizing machine bit. After sizing, the steel pipe enters the cooling tower for water spray cooling. After cooling, the steel pipe will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydrostatic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, they will be detected. Steel pipes should be strictly selected manually after quality inspection. After the steel pipe is inspected, the number, specification, production batch number, etc. shall be sprayed with paint. And hoisted into the warehouse by crane.
Oxygen plus gas flame can not cut stainless steel plate because stainless steel is not easy to be oxidized.
There are ba face, 2b face, (white skin), 2D face, (frosted), HL (wire drawing), 8K face and other surfaces with good quality and brightness.
(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, a year-on-year increase of 27%. From January to may 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%.
Stainless steel why corrosion-resistant stainless steel decorative pipe, 201 stainless steel pipe, stainless steel pipe, all metals react with oxygen in the atmosphere to form an oxide film on the surface. Unfortunately, the iron oxide formed on ordinary carbon steel continues to oxidize, expanding the corrosion and finally forming holes. The carbon steel surface can be guaranteed by electroplating with paint or oxidation resistant metals (e.g. zinc, nickel and chromium),7 mm stainless steel plate, but as is known, the steel below begins to rust.
Characteristics and application 347h austenitic stainless heat strength steel has good corrosion resistance, welding performance and heat strength performance. 347h stainless steel is used for large boiler superheater, reheater, steam pipeline and petrochemical heat exchanger pipe fittings.
details.L stainless steel pipe is also called 00Cr17Ni14Mo2 stainless steel pipe. 00Cr17Ni14Mo2 is an ultra-low carbon steel of 0Cr17Ni12Mo2. 00Cr17Ni14Mo2 has better intergranular corrosion resistance than 0cr17ni14mo2. It is usually used to manufacture industrial equipment such as chemical industry, chemical fertilizer and chemical fiber, such as containers, pipelines and structural parts.
Stainless steel pipe is a long strip of steel with hollow section and no joints around it. The thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, because stainless steel contains chromium, a very thin chromium film is formed on the surface, which is separated from the corrosion resistance of oxygen invaded in the steel.
When water-soluble paper is used to block the ventilation, due to the ventilation from the weld center, the ventilation pipe shall be pulled out quickly at the later sealing link and the residual argon inside shall be used for protection, so as to quickly finish the bottom and seal the mouth.
Usage: it is widely used in automobile industry, aviation industry and other departments.
.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 steel grades for JIS mechanical structures are: S + carbon content + letter code (CK), in which the carbon content is represented by the intermediate value & times; 100,202 stainless steel pipe fittings, the letter C: represents carbon, and K: represents steel for carburizing. For example, the carbon content of carbon coil s20c is 0.18-0.23%. The grades of silicon steel sheets in China and Japan are.
Stainless steel capillary material: SUS301 / sus; Inner diameter 4mm-10mm, polished. Purpose of stainless steel capillary: automatic instrument signal tube, automatic instrument wire protection tube; Precision optical ruler circuit, electronic equipment circuit protection tube; Safety protection of electrical circuit,S31688 stainless steel plate, capillary protection of thermal instrument and internal support of air core high-voltage optical cable. Stainless steel capillary characteristics: it has good resistance, corrosion resistance high temperature resistance, wear resistance, tensile resistance, water resistance, and provides excellent electromagnetic shielding performance. Stainless steel hose can be bent into various angles and radius of curvature, and has the same durability and durability in all directions; The stainless steel hose has flexible pitch, and service. It has long been specialized in stainless steel plate, stainless steel coil and stainless steel belt, Stainless steel pipe. The axial tension can withstand 6 times of the nominal inner diameter. The yield strength of duplex stainless steel is more than twice that of ordinary austenitic stainless steel. This characteristic makes the designer reduce the weight when designing products, making this alloy more cost-effective than 317L. This alloy is especially suitable for - 50 DEG; F/+600° F temperature range. For applications beyond this temperature range, this alloy can also be considered, but there are some, especially for welded structures& middot;Pressure vessel, high pressure storage tank, high pressure pipeline, heat exchanger (chemical processing industry).