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304ti stainlesfrom the current situation of China's stainless steel foreign trade
Relevant information stainless steel export is an important part of China's export economy. It plays an important role in stimulating China's economic growth. However, China's stainless steel export has encountered great resistance.
However, stainless steel is relative, and it is just ordinary stainless steel. It's better not to use it in a particularly polluted environment. You can rest assured to use stainless steel pipes in your daily life.
.The back is blocked with blocking plate for ventilation protection; Only soluble paper or the combination of soluble paper and blocking plate is used for blocking ventilation protection; Use flux cored wire for backing TIG welding.
.In order to obtain seamless pipes with smaller size and better quality, cold rolling, cold drawing or a combination of both must be used. Cold rolling is usually carried out on a two high mill. The steel pipe is rolled in an annular pass composed of variable section circular groove and fixed conical plug. Cold drawing is usually carried out on a single chain or double chain cold drawing machine of 0.5 ~ 100t.
Delivery status: to be delivered after heat treatment and leveling.
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 rolling of cold drawn (rolled) seamless steel pipe is more complex than that of hot rolled (seamless steel pipe). The first three steps of their production process are basically the same. The difference starts from the fourth step. After the round tube blank is emptied,Price of 316L stainless steel strip, it needs to be started and annealed. After annealing pickling shall be carried out with special acid. After pickling, apply oil. Then it is followed by multi pass cold drawing (cold rolling) and special heat treatment. After heat treatment, it will be straightened.
For more than 60 years, architects have been using stainless steel to build cost-effective buildings. Many existing buildings fully illustrate the correctness of this choice. Some are very ornamental, such as the Chrysler Building in New York City. However, in many other applications, the role of stainless steel is not so eye-catching, but in the aesthetics and performance of buildings For example, because stainless steel has more wear resistance and pressure resistance than other metal materials of the same thickness, it is the preferred material for designers when building sidewalks in places with large population flow.
Air pressure and water pressure test: conduct water pressure test for pressure resistant pipes one by one, and keep it for no less than 5 seconds at the specified pressure value. The water pressure test of conventional supply is 45MPa. The air pressure test is p = 0.5mpaa.
Installation material list.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.
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, industrial sensor, electronic equipment circuit protection tube; Safety protection of electrical circuit, corrosion resistance,9m long stainless steel plate, 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, good flexibility and no blocking and stiffness; The stainless steel threading hose has certain tension resistance between the side buckles of each section to prevent the internal laying of the hose from outside. It is a special product manufacturing enterprise integrating R & D, 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, especially for welded structures& middot;Pressure vessel, high pressure storage tank, high pressure pipeline, with an average decrease of 7%. In terms of varieties, the prices of construction wire rod and rebar, fell by 9% and 7% respectively, and the prices of medium and heavy plate and hot rolled coil fell by 7% and 7% respectively.
Production process of hot rolled stainless steel strip / coil: 1. Pickling → 2. High temperature rolling → 3. Process → 4. Annealing → 5. Leveling → ⒍ fine cutting → ⒎ packaging → 8. Reach customers.
Product line.Stainless steel pipe is a common material in stainless steel, with a density of 93 GCM, which is also called 188 stainless steel in the industry. High temperature resistance of 800 ℃, with the characteristics of good processing performance and high toughness, it is widely used in industry, furniture decoration industry and food and medical industry.
Raw materials -- strip splitting -- welded pipe making -- heat treatment -- Correction -- straightening -- end repair -- pickling -- Hydrostatic Test -- Inspection (spray printing) - packaging -- delivery (warehousing) (pipes for welded pipe industrial piping).
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.
.L stainless steel pipe is a kind of hollow long round steel, which is mainly used for industrial transmission pipelines and mechanical structural components such as petroleum,Stainless steel ventilation duct, chemical industry, medical treatment, food, light industry, machinery and instruments, etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in all kinds of manufacturing mechanical parts and engineering structures.
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Stainless steel pipe national standard thickness in the stainless steel pipe industry, the steel that meets the national standard is generally called & ldquo; National Standard & rdquo; Inferior steel that does not meet national standards is called & ldquo; Winning the bid& ldquo; Non standard & rdquo; In practical application, the quality of national standard and non-standard is similar, mainly due to the difference in thickness. A thickness of national standard is actually 1mm, but a thickness of non-standard is actually only 0.8mm or other thickness less than 1mm. Non-standard is basically equivalent to winning the bid. Standard index size (323mm) label number standard implementation standard gbt14976-2012 non-standard specific thickness ratio outer diameter steel pipes are produced according to the standard. 2 non-standard belongs to customized difference. Wood office says ha ha customized on demand. 3 thickness area: the difference between standard, thickened stainless steel American Standard and national standard mainly lies in C content and P content; The C content and P content of Chinese standards are lower than those of American Standard ASTM A312@_@ The two important elements of material are chromium and nickel, 15 9 large plants and 18 8 large plants of national standard and 18 8 small plants of American Standard 132@_ @ The national standard contains more than 17 chromium and the American Standard contains more than 18 chromium@_@ Stainless steel pipe is an American Standard, not in the national standard. The corresponding national standard is 06cr19ni10.