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Galvanized pipe is protected by zinc, so it is not easy to rust, galvanized steel pipe is lighter than seamless steel pipe, if it is used in the balcony, the best light with galvanized pipe, because seamless steel pipe is heavy with thick wall thickness, and the cost of seamless steel pipe is higher than galvanized steel pipe, as well as galvanized steel is durable, useful life is much more than a seamless pipe. If the quality is excellent, using twenty years should not be an issue. Surface coated or hot dip galvanized welded steel pipe can enhance corrosion resistance and prolong life. Difference between galvanized pipe and seamless pipe Manufacturing process difference: galvanized steel refer to a galvanized surface, there may be welded pipe, it could be seamless, seamless steel pipe manufacturing process means welded and seamless points. Uses difference: Seamless steel pipe is very widely used, except for water, gas, oil, general low pressure fluid line pipe, also used as heating oil oil industry in particular, marine oil field oil well pipes, pipelines, chemical coking equipment, a condensate cooler, coal distillation of wash oil exchange Used pipe, and trestle piles, mine tunnel support frame with a pipe. Galvanized pipe generally is utilized to make make fences, fence, fence, balcony guardrail. Commonly used in municipal projects, roads, factories, schools, development zones, gardens, squares, residential and other places.Production standard: GB/T 3091-2001, BS1387 / 1995(UK),BS4568:1970,DIN 2440/2448, ASTM A53Material:SPHC,SPHD,SPHE,Q195-Q235,SAE1006Size: OD (6-610 mm) x WT (1-50mm)GTC (galvanized threaded and coupling) steel pipe: DN15-DN200 (NB1/2″-NB8″)GPE (galvanized plain end) steel pipe: DN15-DN200Grooved steel pipe: DN15-DN200 (NB1/2″-NB8″)Section type: round, square, rectangular, oval and other special section type.

What is galvanized welded steel pipe? Galvanized welded steel pipe is made of rust corrosion measures are not taken welding (welding furnaces, welding) pipe, seamless steel pipe or other metal clarinet, a certain process of hot-dip galvanizing, zinc coating to make it fit the outer coating, played long steel does not rust after processing. Galvanized welded steel pipe used to transport require relatively clean medium, such as: water, clean air. Threaded pipe connection is a common way to connect, two hours at the factory welded pipe, pipe end with threaded and non- threaded.  In order to improve the corrosion resistance of steel tube, normally the carbon steel pipe will be galvanized. Galvanized steel is pided into hot galvanized and electro-galvanized two, thickness galvanized galvanized, electro-galvanized low cost, the surface is not very smooth. Increase the capacity of galvanized steel pipe corrosion and prolong life. Galvanized pipe is widely used, except for water, gas, oil, generally low- pressure fluid line pipe, also used oil heater oil industry in particular, marine oil wells pipes, pipelines, chemical coking equipment, condensing coolers, washing coal distillate oil exchange used tubes, as well as the bridge piles, mine tunnel support frame with a pipe.  Galvanized welded steel pipe for molten metal and iron matrix after a certain reaction with a layer of alloy layer, so that presents the effective combination between substrate and coating, and galvanized welded steel pipe can there are two ways to get, is a kind of hot dip galvanized welded steel pipe, and tprocess is the first to effective pickling of steel tube, then you can, removing fehe other is electric galvanized, hot galvanized welded steel pipe production rric oxide on the surface of the steel tube effectively will steel in ammonium chloride or zinc chloride solution after cleaning, after hot dip.

At the corner of the pipeline, in addition to the standard elbow, mostly by bending pipes made of stainless steel elbow. Two methods of making stainless steel elbow can be cold and hot bending, cold bending forming is the pipe will be at room temperature; hot bending is the pipe is heated to a specified temperature for bending forming. Cold-formed applicable in small diameter tube a bending; bending are commonly used in large diameter and thick wall pipe, such as high pressure pipes bent. It can guarantee the stainless steel elbow quality bending stainless steel pipe fittings, previous work mostly depends on manual operation, high labor intensity, low efficiency, in order to adapt to the development of chemical production, there are many kinds of specialized stainless steel elbow’s device, greatly improving the stainless steel elbow work quality and efficiency. Pipe bend, pipe elbow is stretched, the tube wall of the inner side is compressed, so will the stainless steel elbow in the process of wall thinning. This phenomenon in more people and diameter of the bend radius is smaller under the condition of more obvious, in order to ensure the quality of stainless steel elbow, avoid lateral wall thickness, bending radius should be the reasonable choice of stainless steel elbow. In practice, the bending radius of various pipes can be selected according to the nominal diameter of the pipe. At the same time, the method of the stainless steel elbow and the thickness of the pipe wall, as well as the filling material and other factors are also considered. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Galvanizing is a process of coating iron or steel with zinc in order to provide greater protection against corrosion for the iron or steel base. The process of galvanizing sheet iron was developed simultaneously in France and England in 1837. Both of these methods employed a “hot dipping” process to coat sheet iron with zinc. Like tinplate, early galvanized metals were hand dipped. Today almost all galvanized iron and steel is electroplated. Galvanized pipe process characteristics: 1 zinc sulfate optimization As the crystalline coating is not detailed enough, dispersing ability and poor throwing power, and thus is only suitable for simple geometries such as pipe and wire plating. Sulfate galvanized iron alloy craft of traditional sulfate galvanizing process optimization, leaving only the main zinc sulfate salt, and the remaining components are discarded. In the process of forming a new recipe and adding the right amount of iron, so that the original single-plated zinc alloy metal plating layer is formed. Reorganization process, not only to carry forward the original process high current efficiency, fast deposition rate advantages, but also the dispersion ability and throwing ability has been greatly improved in the past can not be plated complex parts, simple and complex parts can now plated and protective properties increased by 3 to 5 times faster than a single metal. Practice has proved that for wire, pipe continuous plating, coating the grain is more refined than the original, more bright, fast deposition rate. Within 2 ~ 3 min coating thickness to meet the requirements. 2 Zinc sulfate conversion Sulfate zinc sulfate zinc alloy to retain only the primary zinc sulfate salt, the remaining components such as aluminum sulfate, alum (potassium aluminum sulfate), etc. can be processed in the bath, was added sodium hydroxide so as to precipitate an insoluble removal; organic additives, then add powdered activated carbon adsorption removed. Tests showed that aluminum sulfate and aluminum potassium sulfate is difficult to completely remove the one-time, affect the brightness of the coating, but not serious, may be accompanied by the consumption, the brightness can be restored at this time plating solution through the processing, according to new techniques additional ingredients required,to complete the conversion. 3 deposition rate, excellent protection performance Sulfate galvanized iron alloy craft up to 100% current efficiency, fast deposition rate is unmatched in any galvanizing process, speed fine tube 8 ~ 12 m / min, the average coating thickness 2m/min, it is difficult to continuous galvanizing achieved. Bright coating delicate eye. According to national standards GB/T10125 “test in artificial atmospheres – Salt spray test” method of testing, 72 h, plating intact, unchanged; 96 h, coating the surface of a small amount of white rust. 4 unique clean production Galvanized pipe with galvanized iron alloy sulfate process lies between the trough and the trough are perforated production straight out and no solution or overflow. Each step of the production process from the circulation system components, i.e. the alkali solution tank solution, plating solution, and the passivation fluid, light, not only by the outer loop back leakage or discharge system, located only 5 line cleaning tank, cyclic reuse periodic emissions, especially after the production process without passivation without cleaning the wastewater generated. 5 Particularity of electroplating equipment Electroplated galvanized pipe with wire plating, as are all continuous plating, but different plating equipment. Wire with its characteristic elongated strip designed plating tank, the tank is long and wide but shallow. Electroplating wire from the hole piercing, showing a shape in the liquid started to keep distance from each other. Unlike wire and galvanized pipe but has its unique slot equipment is more complex. The tank by the upper and lower parts, the upper part of the plating tank, the lower part of the storage solution circulation tank, the narrow width forming a shape similar to the trapezoidal grooves in the plating bath has a channel running plated galvanized pipe, There are two holes in the bottom of the storage tank is connected to the lower, and the formation of the bath round robin system and sump pump. Therefore, galvanized pipe with wire plating as plating are dynamic in nature, with the difference between the wire plating, plating bath galvanized pipe is dynamic nature.

What is stainless steel tube? Stainless steel tube is typically measured by its outer diameter and can be used in a variety of applications including a number of structural applications. Stainless steel tube  is often used in applications that require rigid materials for potable water conveyance. Manufacturers select stainless steel because certain manmade materials have unwanted or unknown exposure effects while stainless steel has many desirable qualities for maintaining clean water. Steel tubes can also be used for structural support in buildings and vehicles. The terms “tube” and “pipe” are generally interchangeable, although technically, “tube” implies heightened engineering qualities. Tubes are generally manufactured based on standardized sizes. Manufacturing stainless steel tube There are three main methods of manufacturing tubing that lend their names to tubing classifications. · Seamless. Seamless stainless steel tubes are produced through extrusion. Extruded tubes can be formed in a hot or cold process. Long sections of steel bar are forced through a die that blocks out the intended shape of the tube. · As-welded or electric resistant welded (ERW). This method involves passing a rolled sheet of steel through two weld rollers. The weld rollers have a groove around their circumference, through which the steel roll passes. There is a contact at the roll seam that transmits electricity at a high enough current to weld the seam closed. The resulting weld is very small. · Drawn-over-mandrel (DOM). A mandrel is a small piece of metal inserted into the tube to define a shape. It gives the tube extra support to prevent unwanted wrinkling during drawing. The tube is passed through a die that has a smaller diameter than the current tube size. As the tube is drawn, it shrinks to match the size of the die’s diameter. This process allows for tight tolerances and specifications. Each of these manufacturing processes allows manufacturers the ability to form varying tube shapes and sizes. Tubes are not always cylindrical, and can be made in triangle, square or other polygonal shapes. stainless steel tubes destined for certain applications require extra processes as well. Applications involving hydrogen must be factory pre-cleaned or certified as instrument grade due to hydrogen’s reactive characteristics that can cause metal embrittlement or even explosions. Generally, a stainless steel tube manufacturing process is chosen for its interaction with the type of steel to be used. Certain types of steel react poorly to heat because of carbon content, so they can’t be easily welded. Steel types also play a role in decisions regarding use in volatile applications. Applications of stainless steel tube Stainless steel tube is used in high numbers in plumbing applications. The reasons are threefold. One, stainless steel is very sturdy, composed of 80-90 percent steel and 10-20 percent chromium. Steel tubing can handle the types of pressures exerted by water upon plumbing structures. Additionally, the surface of stainless steel does not allow for much adherence by particles or bacteria, so purification processes will not pass on unintended detritus. Finally, steel does not contaminate drinking water. stainless steel tubes are also used in a wide variety of structural applications, such as industrial and residential construction. Examples include fences, gates, railings, playground and athletic equipment. Steel is often used for construction tubes over other metals like aluminum when extra stress resistance is necessary. stainless steel tubes can also be used in automotive applications and even as parts of furniture. Common Applications for Stainless Steel Tubing Stainless steel tubing has a number of uses in a wide variety of industries. It can be used during manufacturing in processing plants or can become part of a final product. Stainless steel tube can also be used in pipelines to transport oil, gas, water, or chemicals. The stainless steel tubing that is supplied by wilsonpipeline can used in a variety of industries, including: Machinery Parts Food and Beverage Processing Pharmaceutical Biotechnology Automotive Marine Construction Chemical Oil and Gas Grade(UNS):304/304L/304H(1.4301/1.4306/1.4948); 316/316L(1.4401/1.4404); 316Ti(1.4571); 321(1.4541);309S(1.4833);310S(1.4845);  317L(1.4438);321H(1.4878);347H(1.4550); 2205(1.4462) ;S31803,2507Outside Dia:6 – 325mm(1/4″ – 12.75″)Wall Thickness:0.50 – 22mmStandards(Norm):EN 10216-5;DIN 17456;DIN 17458;DIN 17459GB/T14975;T14976;T13296;GB5310;ASTM A213;A269;A312;A511;A789;A790;JIS G3459;G3463;GOST 9940;GOST 9941; the main requirement for stainless steels is that they should be corrosion resistant for a specified application or environment. The selection of a particular “type” and “grade” of stainless steel must initially meet the corrosion resistance requirements. Additional mechanical or physical properties may also need to be considered to achieve the overall service performance requirements.

Safe and reliable stainless steel reducer, health environmental protection, economy applicable, thin wall of the pipe and new and reliable, simple and convenient connection method is developed, it has the advantage that the pipe can not be replaced, more and more application in the engineering, use will be more and more, use will be more and more popular, good prospect. The connection mode and principle of stainless steel reducer: The connection of the stainless steel reducer, common way for compression type, pressure type, living type, propulsion and socket welding, articulated type flange connection, welding and welding connection, the traditional welding and welding with traditional connection way of derived series connection. The different methods of these connections, according to its principle, its applicable scope is also different, but most are convenient installation, firm and reliable. Joint seal or gasket material, most choose to meet the requirements of national standard of silicone rubber, nitrile butadiene rubber and epdm and so on, solved the trouble back at home of users. wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless Steel Seamless Pipes are appreciated for various features such as durability, fine finishing, corrosion resistance and dimensional accuracy. The seamless pipes manufacturing process includes the formation of mother tube with the help of premium quality stainless steel strips. The pipes further, goes through cut-off, hydrostatic testing, annealing, straightening and pickling. These pipes are then tested on different quality parameters and marked with company logo. The product is packed flawlessly and delivered to the client. Grades 300 series : 304,304L,316,316L,317L,321,347H,310 400 series : 409, 409L, 410,430 Standards Conforming to international specifications of  ASTM A-213, A-249, A-269, A-312, A-358, A- 688 and its equivalents in ASME, DIN, NFA, JIS etc. These Stainless Steel Seamless Pipes are used in: Heat-exchangers Condenser Boiler Economizers Super-heater Pre-heater Oil coolers Sizes ProductsSize / RangeHeat Exchanger Tubes10.00 mm to 50.80 mm ODInstrumentation Tubes6.00 mm to 25.40 mm ODPipes1/8″ to 6″ NB Specification ProductsSpecificationHeat Exchanger TubesASTM A-213, A-268, A-269, A-270, A-789 DIN -17456 & 17458 ( Class -1) U tubes as per customer’s drawing.Instrumentation TubesASTM A-213, A-269, DIN -17456 & 17458 ( Class -1)PipesASTM- 312, A-790 In addition, engaging in bending, torsional strength of the same, lighter, and they are also widely used in the manufacture of mechanical parts and engineering structures. Also used in producing all kinds of conventional weapons, the barrel, artillery shells and so on…

Stainless steel tee‘s hydraulic bulging process is through the metal materials of axial compensation bulge out a kind of branch pipe forming process. The process is to use special hydraulic press, with three links within the tube billet diameter equal injection liquid, through the two horizontal side of the hydraulic cylinder synchronization of the motion of tube billet, billet after squeezed smaller volume, smaller volume of liquid with the tube billet inside the tube billet and the pressure increases, when the stainless steel tee’s branch pipe bulge out to the pressure, the metal material in the liquid in the cylinder and the pipe pressure under the dual role of flow along the mold cavity and the branch pipe. Stainless steel tee hydraulic bulging process can be a forming, high production efficiency; Stainless steel tee head and shoulders of wall thickness are increased. Stainless steel tee: By the hydraulic bulging process equipment for stainless steel tee tonnage is larger, the current domestic is mainly used for less than the standard of DN400 wall thickness in the manufacturing of stainless steel tee. Its applicable forming material for cold hardening tend to be relatively low low carbon steel, low alloy steel, stainless steel, including some non-ferrous metal materials, such as copper, aluminum, titanium, etc.

Stainless steel elbow is one of the pipe fittings, with different Angle and content to fully demonstrate certain competitive advantage. Stainless steel surface solid and thin oxide film make stainless steel has excellent corrosion resistance in all water quality, even if the ground also has excellent corrosion resistance. Stainless steel elbow is suitable for various water quality, in addition to disinfection sterilization, do not need to control the water quality, at the same time, no corrosion and excessive exudation, can maintain pure water health, prevent secondary pollution, can withstand the high currents of up to 30 meters per second. Stainless steel elbow connection high strength, resistance to vibration, the connection parts of disposable do strong, to avoid the possibility of a “union” loose, construction is convenient and fast, to avoid the field welding homework assignments and set of silk, stainless steel elbow long service life. The corrosion test data indicate that the service life of the stainless steel elbow can reach 100, stainless steel elbow almost do not need to maintain, therefore, its cost performance is very good, operation life of lower cost, economic benefit is remarkable. The stainless steel elbow installation is very convenient. Installation time is only 1/3 of the welding pipe fittings or set of silk, shorten the construction period and cost, avoid the leakage happens. Elbow in connection to use according to certain way and principle to control and use, has the good installation features and value, need to keep the adoption of a certain way of use. The stainless steel elbow use in different areas and industries and the promotion, can ensure the security of water quality and no pollution, used in different places, play an important role. Have excellent mechanical and physical properties. Stainless steel viega profi-press equal tee intensity is very high, is three times as much as 2 times of galvanized pipe, copper pipe, pp-r pipe of 8 to 10 times, can withstand the vibration impact, after using it on with no leakage, no explosion, fire, earthquake and other characteristics, so very safe and reliable; At the same time, the heat preservation performance is good, especially for hot water transport, play a important role in the link. Stainless steel elbow with reliable safety, construction is convenient and quick connection, health, environmental protection performance is good, strong flow pressure loss is small, system compatibility, as well as with the dark outfit, free maintenance, superior economic performance, widely used, etc, suitable for hot and cold water, direct drinking water, heating, air conditioning, fire, gas and other civil low pressure fluid conveying, can also be used in medicine, beverage, food, chemical industries such as low pressure fluid conveying. Stainless steel elbow can be used in different fields, the characteristics and advantages to promote good continuous promotion and advancement, enrich show good value and function, no damage to the construction of value.

The heat exchanger consists of a shell (a large pressure vessel) with a bundle of heat exchanger tubes inside it. One fluid runs through the the heat exchanger tubes, and another fluid flows over the heat exchanger tubes (through the shell) to transfer heat between the two fluids. The set of heat exchanger tubes is called a tube bundle, and may be composed of several types of heat exchanger tubes: plain, longitudinally finned, etc.

Stainless steel elbow won’t produce corrosion, pitting, corrosion or wear and tear. Stainless steel or building one of the highest strength of metal materials in the material. Because the stainless steel has good corrosion resistance, so it can make structure parts permanently maintain the integrity of engineering design. Chromium stainless steel also has high mechanical strength and extensibility, easy processing and manufacturing of parts and can meet the needs of architects and structural designers. All metal and atmospheric oxygen in the reaction, formed in the surface oxide film. Unfortunately, in the ordinary carbon steel formed on the oxidation of iron oxide to continue, kept expanding rust, eventually forming holes. Can use paint or resistant to oxidation of the metal (for example, zinc, chromium and nickel) on plating to ensure that the surface of carbon steel, but, as we know, the protection is only a thin film. If the cover was damaged, the following steel began to rust. Weak corrosive medium such as air, steam, water resistance and acid, alkali, salt and other chemical etching medium corrosion of the steel. Also called acid-proof stainless steel. In practical application, often called the weak corrosive medium corrosion resistant steel stainless steel, and called the resistance to chemical corrosion medium steel acid-resistant steel. Due to the chemical composition on the difference between the two, the former does not necessarily medium resistance to chemical corrosion, while the latter are generally not rust. The corrosion resistance of stainless steel depends on the alloy element content in the steel. Chromium is the basic element to stainless steel for corrosion resistance, while about 1.2% chromium content in steel, chromium and oxygen effect of corrosive medium, in the steel surface to form a thin layer of oxide film (since the passivation film), but to prevent further corrosion of steel substrate. Commonly used alloying elements except chromium and nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., in order to meet the requirements of various applications on the microstructure and mechanical properties of stainless steel. Stainless steel usually according to the matrix was pided into: 1, ferritic stainless steel. Chromium containing 12% ~ 30%. Its corrosion resistance, toughness and weldability with chromium content increases with the increase of chloride stress corrosion resistance is superior to other types of stainless steel. 2, austenitic stainless steel. Chromium is more than 18%, still contain about 8% of the nickel and small amounts of molybdenum, titanium, nitrogen and other elements. Good comprehensive performance, corrosion resistant to a variety of media. 3, austenitic, ferritic duplex stainless steel. The advantages of both austenitic and ferritic stainless steel, and has the superplasticity. 4, martensite stainless steel. High strength, but the plasticity and poor weldability. The butt welding elbow calculation formula The calculating formula of butt welding elbow: 1. The outer diameter X – wall thickness wall thickness X0.0387 X 1000 = 90 ° elbow bending radius present theoretical weight For example: 426 x 90 ° 10 R = 1.5 D (426-10) * 0.387 * 10 R600 present 1000 = 96.59 Kg The 180 ° elbow on table 2 times, 45 ° calculated at 1/2; 2. – wall thickness (diameter) X thickness X0.02466 XR multiples X1.57 X = 90 ° bend the theoretical weight of nominal diameter Example: for example: 426 x 90 ° 10 R = 1.5 D (426-10 * 10 * 0.02466 * 1.5 * 1.57 * 400 D = 1.5 Kg The 180 ° elbow on table 2 times, 45 ° calculated at 1/2. Stamping welding elbow is to use the same as the pipe material of sheet in stamping die stamping into half a piece of ring elbow, then two and a half ring bend group for welding. Differ as a result of all kinds of pipe welding standard, usually by groups of some solid semi-finished products factory, site construction according to the welding pipe weld grade, therefore, also known as the butt welding elbow. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

The Seamless steel pipe for ship building usage is mainly used for Level 1 & Level 2 pressure pipe in piping system, boiler and super-heated unit of shipbuilding. Seamless steel pipes for ship-building refer to the ship building steel pipes which are designed and manufactured for boilers,super heaters and pressure systems of ship. The ship building steel pipes can be expansively used in various kinds of ships such as CCS,DNV,LR,GL,ABS,BV,RINA,NK as well as China national standards. Classification of ships:Standard for malerials and wielding from Chinese classifying society Chinese clasifying society (CCS) Standard of DNV Det Norske Veritas (DNV) Standard of Lloyd’S Register of UK (LR)　Lloyd’S Register of UK (LR) Standard of Germanischer Lloyd Germanischer Lloyd (GL) Standard of American Bureau of Shipping (ABS) American Bureau of Shipping (ABS) Standard of BUREAU VERITAS (BV) BUREAU VERITAS (BV) Standard of RINA Italian classification society (RINA) Standard of NIPPON KAIJI KYOKAI(NK)NIPPON KAIJI KYOKAI(NK) GB/T5312 Chinese national standard Appication：Seamless steel pipes for manufacturing marine boilers and ovemeaters as we as pressure pipes opf grade I and Ⅱ． Model N0．of major steel tube320，360，410，460，490，etc． Types of steel tubes Outer diameters wall thickness Cold-rolled tubes Rube size(mm)tolerances (mm)Tube sizes (mm)Tolerances (mm) ＞30～50 ±0.3 ≤30 ±10％ ＞50～219 ±0.8％ Hot-rolled tubes ＞219 ±1.0％ ＞20 ±10％ Mechanocal properties： Standard code Models of steel tubes Tensile strength（MPa） Yield strength（MPa） Elongation（％） GB/T5312 320 320～410 ≥195 ≥25 360 360～480 ≥215 ≥24 410 410～530 ≥235 ≥22 460 460～580 ≥265 ≥21 490 490～610 ≥285 ≥21 Chemical compisition: Standard code Models of steel tubes Chemical compisition（％） C Si Mn P S GB/T5312 320 ≤0.16 ≤0.35 0.40～0.70 ≤0.035 ≤0.035 360 ≤0.17 ≤0.35 0.40～0.80 ≤0.035 ≤0.035 410 ≤0.21 ≤0.35 0.40～1.20 ≤0.035 ≤0.035 460 ≤0.22 ≤0.35 0.80～1.40 ≤0.035 ≤0.030 490 ≤0.23 ≤0.35 0.80～1.50 ≤0.035 ≤0.030 Note： residual elements: Cr≤0.25％, Mo≤0.10％, Ni≤0.30％, Cu≤0.30％ aggregate≤0.70％