. The agitation in the futures market is more direct. If there is an abnormal change in inventory, whether it increases or decreases, it will become a speculative type of mall participants.
In view of the continuous vibration of stainless steel pipe shopping malls, even & ldquo; Roller coaster & rdquo; Market, stainless steel pipe market participants are implementing it carefully & ldquo; Fast forward and fast Exit & rdquo; Therefore, the national stainless steel pipeline inventory has been at a low level. High price various specifications of stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe. Waste merchants, industrial companies, enterprises and power departments are welcome to visit and negotiate with the company! At the beginning, the social inventory of stainless steel pipes should progress with the progress of economic aggregate,1Cr18Ni9 Stainless, and with the progress of total output and demand. However, stainless steel pipe inventory did not increase too much, or even did not increase, indicating a relative decline in social inventory level. Low inventory has indeed played a role in market stability.
.Model 302 & mdash; The corrosion resistance is the same, and the strength is better because the carbon content is relatively high.
Stainless steel has the ability of atmospheric oxidation, that is, it does not rust. At the same time it also has the ability of corrosion resistance in the medium containing acid, alkali and salt, that is, corrosion resistance. However, its corrosion resistance changes with its own chemical composition, mutual state, service conditions and environmental medium type. For example, 304 has absolutely excellent corrosion resistance in dry and clean atmosphere, but it is moved to In coastal areas, it will soon rust, while 316 stainless steel performs well. Therefore, not any kind of stainless steel can resist corrosion and rust at any time
.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, stainless steel pipe materials have been widely used in public transportation tools such as buses, subways, high-speed railway vehicles, household cars and so on!
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, 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.
. 18%), so as to facilitate further development. In particular and relevant parties are starting from reducing the wall thickness and lowering the grid, the price of stainless steel pipe is not high, so the supporting connection the reliability and price of pipe fittings are the main factors determining its development. Domestic developers have independently developed connection technology and pipe fittings in Sichuan, Guangdong, Zhejiang, Jiangsu and other places which is a promising pipe. The Ministry of construction and relevant departments also attach great importance to this new type of pipe. According to China technology market management promotion center and gksz  No. 71 document on Application & ldquo; High diameter to wall ratio and high precision stainless steel medium and high pressure water supply pipes and supporting fittings and special technology & rdquo; It is learned from the notice that the application of stainless steel pipe technology and product is of great significance to improve the grade of modern buildings in China and improve and ensure the water quality of water supply.
In order to protect the welding pool well with argon and facilitate the welding operation, the center line of tungsten electrode and the workpiece at the welding position shall be kept 80 ~ 85° Angle, the included angle between filler wire and workpiece surface shall be as small as possible, generally 0-DEG; about.
Quality risk.Stainless steel pipe will not rust, but it is relatively not easy to rust. It will rust in a specific environment. It will rust if placed in seawater or acid-base environment. Even in the air, it will be corroded and oxidized slowly, but it will take a long time. In general, stainless steel pipes will not rust. However, if the stainless steel pipe is used or maintained improperly or the environment in which the stainless steel pipe is located is too bad, the stainless steel pipe may rust. When we see rust spots on the steel surface, we can quickly confirm that it is a sign of rust. Why does stainless steel pipe rust? First of all, let's understand the structure of stainless steel pipe: stainless steel pipe is a crystal solid composed of atoms similar to a piece of toys. In addition to iron, it also contains its metal components, nickel,Stainless steel water tank plate factory, titanium, etc. Chromium and nickel have anti rust function. It forms a protective film - passive film to prevent stainless steel pipe from rusting. Generally, as long as the film is not damaged, broken or contaminated by impurities, the stainless steel pipe will not rust. However, if the blunt film is damaged due to improper use or maintenance, the stainless steel pipe will rust.
National standard thickness of stainless steel pipe when American standard stainless steel pipe is used, there are different tolerances for seamless hot expanded pipe, seamless cold rolled pipe and welded pipe according to different dimensions. For example, for hot expanded pipe with diameter less than 100mm, the upper limit tolerance of thickness is 40%; If the standard of stainless steel pipe is Chinese standard, according to the tolerance of stainless steel pipe for fluid transportation in gbt14976, the tolerance here is the tolerance when ordering according to the nominal thickness; According to the manufacturing method, the thickness standard of stainless steel pipe is divided into hot rolling and cold rolling, including thin plate with thickness of 0.5-4mm and thick plate with thickness of 5-35mm. The specific gravity of stainless steel pipe is 9. The weight = specific gravity of length and width of thickness, and the weight of plate with thickness of stainless steel pipe of 1mm = 11 m 2 m 93 = 86 kg 2 m (length) 1 m (width) 0.01 M (thickness) 93 (specific gravity) = 0.1586 tons (weight)
The main function of chromium is the organizational structure of. Chromium has high chemical stability, can form a passive film on the steel surface, isolate the metal from the outside, protect the steel plate from oxidation and increase the corrosion resistance of the steel plate. After the passivation film, the corrosion resistance decreases.
Stainless steel is more than twice as high and has enough plastic toughness for forming. The wall thickness of storage tank or pressure vessel made of duplex stainless steel is 30-50% less than that of common austenite, which is conducive to reducing the cost.
manufacturer.The inventory of stainless steel pipes may be an important factor in market conditions. This is because at this stage, steel inventory has become an important index to investigate and judge the situation of stainless steel pipeline shopping malls, and has become a wind vane to judge the future market trend. What was the stock of stainless steel tubes at that time? It directly affects the air of shopping malls, and then distributes the business behavior of participants in shopping malls
The American Iron and Steel Institute uses three digits to identify various standard grades of malleable stainless steel. Among them, austenitic stainless steel is marked with numbers of 200 and 300 series. For example, some ordinary austenitic stainless steel is marked with 20 and.
SPHC—& mdash; In the first place, s is the abbreviation of steel,410 stainless steel plate wholesale, P is the abbreviation of plate, h is the abbreviation of hot heat and C is the abbreviation of commercial. It generally represents hot-rolled steel plate and strip.
.Doing well in marketing strategy innovation is a very key factor for every manufacturer joining stainless steel pipe to realize the marketing effect of market competition; However, due to the different characteristics of each market, stainless steel pipe manufacturers need to make different marketing strategy adjustments; As the saying goes, & ldquo; No matter what kind of cat it is, catching mice is a good cat& rdquo; Professional projects include: stainless steel plate, stainless steel coil, stainless steel belt, stainless steel pipe and other related businesses. Merchants who hope to have this business please. This is also true in the marketing strategy. Therefore, manufacturers of stainless steel pipes need to make marketing innovation at any time to match the changing market conditions.
There are 45 kinds of hot rolled (hot) steel pipes with a diameter of 54 ~ 480mm, 65 kinds of cold drawn (rolled) steel pipes with a diameter of 6 ~ 200mm and 39 kinds of wall thickness of 0.5 ~ 21mm.
Usage: widely used in automobile, tractor and other industries.