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• What are pipe fittings? Pipe fittings basically include the range of components that are used to connect pipe ends for in-line, multi-port, offset and mounting configurations. Pipe fitting cross sections are mostly, but not always, circular in shape to match with the pipe section with which they are connected. Pipes can be metallic and pipe fittings vary depending on the type of pipe used. Pipe fittings are used for various purposes. They can be used to extend or terminate pipe runs, change a pipe’s direction, to connect two or more pipes and to change the pipe size. • Application Pipe fittings are used with equal importance in pressurized applications and non-pressure applications like drain, waste, and vent (DWV) systems. Pipe fitting also finds application in plumbing, HVAC (High Voltage Alternating Current), manufacturing, etc. Pipes are primarily meant for transporting various solids and fluids, and hence, pipes and pipe fittings are constructed from a wide range of materials. In fact, the materials used for making pipe fittings depend much on their application. • Buyers Consideration for Buy Pipe Fittings 1. Size is the most important parameter that should be considered while buying pipe fittings. There are various options available for size of pipe fittings like: » Standard English sizes: These sizes range from 1/8” to greater than 36 “. » Metric sizes: Popular metric sizes range from less than 10 mm to greater than 1000 mm. » Schedule: The “schedule numbers” are assigned by the American National Standards Institute (ANSI) in order to classify the thickness of walls for use with different pressure. ANSI schedule numbers include all pipe and fitting sizes from NPS 1/8 through NPS 36, which are classified as Standard (STD), Extra Strong (XS) and Double Extra Strong (XXS) and all wall thicknesses by ANSI schedule number. The selection for size should be considered only for fittings that match with the pipe type adhering to the specific ANSI schedule number. However, there are many pipe fittings that does not possess an ANSI number. 2. Shape of pipe fittings is another important parameter the buyer’s should consider while selecting pipe fittings. The popular shapes available for pipe fittings include oval, round, square and rectangular. However, the round or circular shape is the most popular one. 3. Material: The type of material used for making pipe fittings is also very important. Construction and material specifications of pipe fittings are application-dependent. Optimization of component selection largely requires consultation of the users with the fitting suppliers. Actually a wide range of materials are used for making pipe fittings. The buyer’s are often confused judging the right material for fittings. The most common materials used include aluminum, carbon, brass, bronze,  stainless steel, carbon and alloy steel,  cast iron, ductile iron, titanium, and zirconium. 4. Pipe Fittings End: Buyers are often confused while selecting pipe fitting ends. Proper selection for pipe fitting end is very essential for proper flow of the material. The ends of pipe fittings are built slightly larger than in such a manner so that the connections can easily fit in without narrowing the inner diameter (ID) of the pipe. This keeps flow consistent. The most common fitting ends available are: » Male pipe thread » Female pipe thread » Plain end bell or socket » Flange » Male straight thread » Female straight thread 5. Connector types: While selecting pipe fittings, the buyer should make sure that a fitting can have two different connector types — threaded or slip, male or female. One end of the fitting might be male threaded and the other female threaded. Metal pipes are usually threaded, while plastic pipe can be threaded or slip fit. Generally, threaded pipes screw together to connect, while slip fit pipes make use of sleeves that slip into one another. Pipe fittings are kept in place by male and female connectors like: » Male threaded: In this case, threads are exterior and are designed to screw into the inside of a larger diameter pipe end with internal threading. » Female threaded: Here the threads are interior, designed to receive male threaded pipe fittings. » Male slip fit: In this case, there are no threads, and the fittings are designed to slip into a female sleeve, slightly larger in size. » Female slip fit: There are no threads, and are made to receive a narrower male slip fit. 6. Features: Pipe fittings enable pipe to be installed and joined where necessary and terminated in the appropriate place. A buyer should also consider the features of pipe fittings before selecting them. Each kind of pipe has its own specification and requires its own type of fitting, but all fittings share some common features like: » Pipe fittings are either male or female, which is related to the proper positioning at the connecting points. » Pipes, nipples and male fittings usually insert into female fittings. In threaded fittings, male threads are on the outside and female threads are on the inside. Fittings that have one male end and one female end are called street fittings. » While measuring the size of fittings, male threaded fittings are measured OD or to the outside edge, while female fittings are measured ID, or to the inside edge of the inlet. 7. Pipe fittings should also be chosen on the basis of the inner and outer diameter of the pipe so that they easily fit the pipe. Pipe fittings can also be plated, lined, insulated and underground rated and therefore selecting the right one is very important.

Forged flange have the best mechanical character in the flange products. In our factory , we uasally produce flange with open-die drop forging also known as smith forging. • Forgings (including the forging rolling) the level of its technical requirements should be consistent with the corresponding requirements JB4726-4728. 1. 0.25MP-1.0MPa Nominal pressure PN is carbon steel, austenitic stainless steel forgings forging allows the use of grade Ⅰ. 2. In addition to the following provisions, the nominal pressure PN is 1.6MPa-6.3MPa forgings should meet Grade Ⅱ or above grade Ⅱ forging level requirements. 3. One of the following cases, Ⅲ and forgings shall comply with the requirements of: (1) Nominal pressure PN ≥ 10.0MPa flange forgings; (2) Nominal pressure PN> 4.0MPa chrome molybdenum steel forgings; (3) Nominal Pressure PN> 1.6MPa and the temperature ≤ -20 degrees Celsius ferritic steel forgings. • With neck butt, with neck flat welding, socket welding and threaded flange forging or forging generally use the rolling process is made. When using steel or steel manufacture, must meet the following requirements: 1. Steel plate shall be subject to ultrasonic testing, non-hierarchical defect; 2. Shall be cut along the rolling direction of steel strip, after bending butt into the ring and make rings formed on the surface of steel cylinder. Shall not be used directly machined into a steel plate with a neck flange; 3. Ring butt weld should be full-penetration weld; 4. Ring butt weld heat treatment after welding should be carried out and to make 100%-ray or ultrasonic flaw detection, and in line with JB4730-ray flaw detection of the II-level requirements, ultrasonic flaw detection of the I-level requirements in line with JB4730. • Belt neck flat welding flange, threaded flange socket welding flange and the outer slope of the neck should be no more than 7o.

1. Hydraulic fittings Hydraulic systems use extremely high fluid pressures to create useful work, such as in the hydraulic actuators for powered machinery such as bulldozers and backhoes. 2. Elbow Short radius 45° elbow or regular 45° elbow  Long radius 90° elbow or sweep 90° elbow  An elbow is a pipe fitting installed between two lengths of pipe or tubing to allow a change of direction, usually a 90° or 45° angle, though 22.5° elbows are also made. The ends may be machined for butt welding elbow, threaded (usually female) elbow, or socketed elbow, etc. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow. Elbows are categorized based on various design features as below: Long Radius (LR) Elbows – radius is 1.5 times the pipe diameter Short Radius (SR) Elbows – radius is 1.0 times the pipe diameter 90 Degree Elbow – where change in direction required is 90° 45 Degree Elbow – where change in direction required is 45° A 90 degree elbow is also called a “90 bend” or “90 ell”. It is a fitting which is bent in such a way to produce 90 degree change in the direction of flow in the pipe. It used to change the direction in piping and is also sometimes called a “quarter bend”. A 90 degree elbow is available in many materials like copper, cast iron, carbon steel, stainless steel, galvanized steel. The main application of an elbow (90 degree) is to connect hoses to valves, water pressure pumps, and deck drains.  A 45 degree elbow is also called a “45 bend” or “45 ell”. It is commonly used in water supply facilities, food industrial pipeline networks, chemical industrial pipeline networks, electronic industrial pipeline networks, air conditioning facility pipeline, agriculture and garden production transporting system, pipeline network for solar energy facility, etc. Most elbows are available in short radius or long radius variants. The short radius elbows have a center-to-end distance equal to the Nominal Pipe Size (NPS) in inches, while the long radius elbows is 1.5 times the NPS in inches. Short elbows are widely available, and are typically used in pressurized systems. Long elbows are typically used in low-pressure gravity-fed systems and other applications where low turbulence and minimum deposition of entrained solids are of concern.  3. Coupling  Pipe coupling, a coupling connects two pipes to each other. If the size of the pipe is not the same , the fitting may be called a reducing coupling or reducer. By convention, the term “expander” is not generally used for a coupler that increases pipe size; instead the term “reducer” is used. 4. Union  A combination pipe union and reducer fitting, A union is similar to a coupling, except it is designed to allow quick and convenient disconnection of pipes for maintenance or fixture replacement. While a coupling would require either solvent welding, soldering or being able to rotate with all the pipes adjacent as with a threaded coupling, a union provides a simple transition, allowing easy connection or disconnection at any future time. A standard union pipe is made in three parts consisting of a nut, a female end, and a male end. When the female and male ends are joined, the nuts then provide the necessary pressure to seal the joint. Since the mating ends of the union are interchangeable, changing of a valve or other device can be achieved with a minimum loss of time. Pipe unions are essentially a type of flange connector, as discussed further below. 5. Reducer Reducer fittings, a reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt to existing piping of a different size. Reducers are usually concentric reducers buteccentric reducers are used when required to maintain the same top- or bottom-of-pipe level. 6. Olets Whenever branch connections are required in size where reducing tees are not available and/or when the branch connections are of smaller size as compared to header size, olets are generally used. The following are few configurations of olet connections: Flanged Olet Socket-Weld Olet Threaded Olet Lateral Olet Elbow Olet Nipple Olet Butt-Weld Olet 7. Tee  Pipe tee, a tee is the most common pipe fitting. It is available with all female thread sockets, all solvent weld sockets, or with opposed solvent weld sockets and a side outlet with female threads. It is used to either combine or split a fluid flow. It is a type of pipe fitting which is T-shaped having two outlets, at 90° to the connection to the main line. It is a short piece of pipe with a lateral outlet. A tee is used for connecting pipes of different diameters or for changing the direction of pipe runs. They are made of various materials and available in various sizes and finishes. They are extensively used in pipeline networks to transport two-phase fluid mixtures. They are categorized as: Equal tee Unequal tee When the size of the branch is same as header pipes, equal tee is used and when the branch size is less than that of header size, reduced tee will be used.  8. Cross Cross fittings are also called 4-way fittings. If a branch line passes completely through a tee, the fitting becomes a cross. A cross has one inlet and three outlets, or vice versa. They often have solvent welded socket ends cross or female threaded ends cross. Cross fittings can generate a huge amount of stress on pipe as temperature changes, because they are at the center of four connection points. A tee is more steady than a cross, as a tee behaves like a three-legged stool, while a cross behaves like a four-legged stool. (Geometrically, “any 3 non-colinear points define a plane” thus 3 legs are inherently stable.) Crosses are common in fire sprinkler systems, but not in plumbing, due to their extra cost as compared to using two tees. 9. Cap  Pipe cap, a type of pipe fitting, usually liquid or gas tight, which covers the end of a pipe. A cap is used like plug, except that the pipe cap screws or attaches on the male thread of a pipe or a nipple. They have a solvent weld socket end cap or a female threaded end cap. If a solvent weld cap is used to provide for a future connection point, several inches of pipe must be left before the cap. This is because when the cap is cut off for the future connection, enough pipe must remain to allow a new fitting to be glued onto it. In plumbing systems that use threaded cap, the cap has female threads. Industrial caps can be round, square, rectangular, U-shaped, I-shaped and have a round hand grip or a flat hand grip. 10. Plug A plug closes off the end of a pipe. It is similar to a cap but it fits inside the fitting it is mated to. In a threaded iron pipe plumbing system, plugs have male threads. 11. Nipple A short stub of pipe, usually threaded steel, brass or copper; occasionally just bare copper. A nipple is defined as being a short stub of pipe which has external male pipe threads at each end, for connecting two other fittings. Nipples are commonly used for plumbing and hoses, and second as valves for funnels and pipes. 12. Gender of fittings Piping or tubing are usually (but not always) inserted into fittings to make connections. To avoid confusion, connections are conventionally assigned a gender of male or female, respectively abbreviated as “M” or “F”. Common fittings for both piping and plumbing, While there are hundreds of specialized fittings manufactured, some common types of fittings are used widely in piping and plumbing systems.

Where can I buy pipe fittings ? If you want to buy high-quality pipe fittings, I suggest you to consult wilsonpipeline Pipe Industry Co., Limited. wilsonpipeline Pipe Industry mainly produces the industrial pipe fittings made of austenitic stainless steel, duplex steel and super duplex steel. It uses internationally advanced production process and equipment and domestic/imported high-quality raw materials to manufacture various pipe fittings such as elbows, tees, reducers, stub ends, caps, flanges, pipe fittings and other products. It can produce the standard products in accordance with the national standard, petrochemical industry standard, chemical industry standard, electric power industry standard, American standard, Japanese Standard, German Standard, Russian Standard and other standard and it can also process and manufacture non-standard products according to customers’ special requirements. Right now, the company’s products are well sold in more than ten provinces and regions in China (including Hong Kong and Taiwan) and the products based on the American standard and EU standard are marketed in USA, Canada, Brazil, Germany, UK, France and Middle East. Its product quality is unanimously praised by both domestic and foreign customers. The wilsonpipeline Pipe Industry is composed of the marketing department, purchase department, quality department, production technology department, HR department and financial department. The quality department has two parts: physical & chemical laboratory and quality supervision workshop; the production technology department consists of blanking workshop, forming workshop, welding and heat treatment workshop, machining workshop, pickling and polishing workshop, and packaging workshop. Each workshop is established according to the working procedures, which can facilitate specialized and serialized production, and achieve stable enhancement of production efficiency as well as product quality. Adhering to the principles of “customer first and business integrity” and being market-oriented, the company always maintains communication and cooperation with other domestic/foreign enterprises; it makes full use of its human resource and innovative technologies to enhance the Jiede brand and establish a top-class corporate image; it always seeks new achievements in the domestic/foreign stainless steel pipe fittings industry! wilsonpipeline Pipe Industry Co., Limited Contact Person : Ms. Yane Job Title : sales manager Business Phone :+86-18267732328 Skype :skaifox Email :sales@wilsonpipeline.com Website: www.wilsonpipeline.com

Where can i buy stainless steel flanges ? Stainless steel flanges brand — wilsonpipeline wilsonpipeline Pipe Industry products mainly include super duplex stainless steel flanges, super duplex stainless steel pipe fittings, super duplex stainless steel pipe, duplex stainless steel flanges, stainless steel flanges, bearing plug, head, took over the seat and other high school low-pressure pipe products. wilsonpipeline Pipe Industry Co., Limited been able to develop rapidly and completely dependent on their rich experience fittings, attention to service and quality, their quality is the fundamental enterprise development! Stainless steel flanges Flange is a disk-shaped parts, the most common in the pipeline project, flanges are paired and the mating flange on the valve used. Flanges (Flange) also known as flange or flange. Tube and pipe flanges are so interconnected parts, connected to the pipe end. There are holes on the flange bolts so that the two flanges tightly connected. Between the flange sealing gasket. Flange points threaded connection (wire connected) flange and welding flange. Common standards of stainless steel flanges: GB: GB9112-88 (GB9113 · 1-88 ~ GB9123 · 36-88) American Standard: ANSIB16.5, ANSI16.47 Class150,300,600,900,1500 (TH, LJ, SW) Japanese standard: JIS5K, 10K, 16K, 20K (PL, SO, BL) German standard: DIN2527,2543,2545,2566,2572,2573,2576,2631,2632,2633,2634,2638 (PL, SO, WN, BL, TH) Italian standards: UNI2276,2277,2278,6083,6084,6088,6089,2299,2280,2281,2282,2283 (PL, SO, WN, BL, TH) British standard: BS4504,4506 Ministry of Chemical Industry Standard: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91 HG20592-97 (HG20593-97 ~ HG20614-97) HG20615-97 (HG20616-97 ~ HG20635-97) machinery of the standard: JB81-59 ~ JB86-59, JB / T79-94 ~ JB / T86-94 Pressure Vessel: JB1157-82 ~ JB1160-82, JB4700-2000 ~ JB4707-2000 Marine Flange Standard: GB / T11694-94, GB / T3766-1996, GB / T11693-94, GB10746-89, GB / T4450-1995, GB / T11693-94, GB573-65, GB2506-89, CBM1012-81 , CBM1013 like. The formula weight of the stainless steel flanges (Diameter * outer diameter – inner diameter * inner diameter – bolt aperture * * bolt bolt aperture number of holes) * Thickness * 0.623 * 0.0001 = stainless steel flange machined finished theoretical weight. General domestic use stainless steel flange lathe processing out of the flange will be a little error of plus or minus. And the actual weight of the flange have a little error. So we called the theoretical weight. General domestic theory are used to measure the weight of a standard flange. The main role of stainless steel flanges 1, the connecting pipe and holding pipe sealing performance. 2, easy to replace certain pipeline. 3, easy to open inspection line situation. 4, to facilitate the closure of certain pipeline.

What is the head? Head of a kind of boiler pressure vessel components. The pipe by local heating and mechanical transmission and elbow, maximum power can reach 120kw by medium frequency induction heating method, heating of various size specifications of the tubes, fast heating, power can be stepless regulation, start good, stable performance, small footprint, easy operation and maintenance. Processing range: carbon steel, 0 degrees -180 stainless steel tube, alloy steel tube and steel ring hot bending and bending production. And can be processed through a tube of multiple bends and spatial multi bends. Processing diameter: Phi Phi 325mm 76mm; thickness: 3.5mm30mm. What is the pipe cap? pipe cap: welding the pipe end or installed in the pipe outer thread on the cover wall pipe fittings. Stainless steel head range of applications: petroleum, electronics, chemical, textile, food, machinery, construction, pressure vessel and so on Zhuozhou talent network industry. Stainless steel head is used in pipe installation of a connecting pipe, connecting the two nominal diameter of the same or different tubes, so that the pipe to make a certain angle turn. Stainless steel head of other names: stainless steel straight edge of the side of the side of the head, a barrel body screw, ellipsoidal head, light head, various sizes of head, stainless steel head screw, flat bottomed, hemisphere type rotary, spherical head and so on. Is the head of the petroleum chemical industry, atomic energy to the important part of the indispensable in the pharmaceutical, food, a lot of pressure vessel industry equipment, used in a variety of containers of equipment, such as storage tank, heat exchanger, tower, reaction kettle, boiler and separation equipment, is the head of the container of a component according to different geometric shapes can be pided into spherical, oval, dish shaped, spherical, cone shell peace cover several. Head according to the different materials: forged steel, carbon steel, stainless steel head etc. Type of head Head according to the material can be pided into: plastic, stainless steel head, head products mostly convex, conical shell, reducing, a flat cover and tighten export. Which convex head (sometimes called by shape classification) include: hemisphere shaped head, elliptical head, dished and spherical pipe cap shaped head. Manufacturing method of head A) small head: integral forming; B) large, medium-sized head: first assembly molding – with the most, the standard requirements for it; C) super large head: due to the transport and opening and other factors, the first sub flap molding, after the group together. The pipe cap and the head is very similar in appearance. The pipe cap and the head of the main difference between them in size and scope. This paper compares the pipe cap and the head of their respective characteristics are as follows: pipe cap is a pipe plug, DN will use the head instead of more than 300, if the pressure, to check the strength. pipe cap and the shape of the head is almost, stainless steel head used more, pipe cap size is relatively small, can be forged; head size is larger, generally with the pressing of steel, pipe pipe cap is generally used for the end of the pipe, head for container equipment (vertical) equipment parts or left and right ends (horizontal); Head is inside, such as 1 meters are refers to the inner pipe cap on the transition portion not required (unlike standard oval), general manual only check to diameter and length, and straight edge part for long. Stainless steel heads are widely used in energy, power, chemical, metallurgy, mechanical, atomic energy, aerospace and other fields for its unique advantages. The head is one of the boiler parts in the pressure vessel, which is an important part of the pressure vessel equipment in petrochemical industry, atomic energy and food industry. In the end, the head is heated by the intermediate frequency induction heating mode while the pipe is driven by mechanical transmission. The pipe cap and the head of the main difference between them is in diameter, and the applicable scope. Stainless steel head is inside diameter, and straight edge part is longer. pipe cap is a pipe head and pipe cap and the shape of the head almost, pipe cap size is relatively small, can be forged; head size is larger, generally with the pressing of steel, pipe pipe cap is generally used for the end of the pipe, head for container equipment of the upper and lower parts or left and right end part.

Stainless steel pipe products with excellent corrosion resistance, and not easy to rust, it is as I mentioned earlier, its composition containing chromium elements. Combines with oxygen in air and solid surface and form a tight-knit not state oxide, this does not scale membrane can prevent the steel surface oxidation (rust), and can play a role of protecting surface, in order to prevent the corrosion of various corrosion factors. As a result, such skin membrane corrosion if for some reason, and damage, and in the chromium and oxygen cannot junction, so will start to rust stainless steel pipe. 1. When the road construction, construction engineering, or walking all kinds of vehicles, by its flying sand soil, dust, iron powder, such as the attachment. 2. By cars, buses and other harmful material such as sulfurous acid content in the exhaust gas pollution. 3. Affected by various industrial and mining waste incineration, building warm and cool gas and dust, elimination of harmful ingredients in exhaust pollution. 4. The hot spring area produce corrosive gas pollution. 5. Polluted by coastal sea breeze contains salt adhesion. 6. The cleaning solution to pollution. Polluted by grain hands dirty. 7. Protected by surface with mucous membrane pollution. However, as long as eliminate corrosion reason and make chromium can combine with oxygen, so that will produce again not scale membrane, and restore its corrosion resistant function. stainless steel pipe, which is a metal which is not easy to rust, but not absolutely not rusty metal. On the basis of different conditions of use or the use of the environment, will also be contaminated and rust. You don’t think stainless steel pipe is not rust, neglect the daily maintenance, wait for contamination, rust is the most serious, and in a ticket to do clearance, such measures are the most down. Make the stainless steel pipe with pollution, the cause of the rust, have a lot of kinds, but in general, are affected by composition of phytoplankton iron powder or harmful gas in the atmosphere, because of adhesion, accumulation, and the wind caused by salt contained in the attachment. These attachments will gradually gathered, add moisture and fixation, so that damage does not scale membrane on the surface of the stainless steel pipe, and breach of the skin membrane regeneration effect, and stainless steel pipe began to rust. The rust of the initial state, do clear is more simple, can restore the original state. Even after long placed, as long as the proper cleanup, also can restore the appearance of the slightly different than the original condition. So that the rust of the stainless steel pipe, it’s just the surface, rather than the corrosion of material itself. This and raw steel rust, is fundamentally different. Therefore, stainless steel pipe can sometimes be rusty, but as long as they often do maintenance, you can always keep the stainless steel pipe was beautiful.

What is alloy head For in the pressure vessel made of an alloy head and cylinder in terms of composition, such as tanks, because the alloy head and cylinder joints structure is not continuous, so that the site has become one of the high stress area. Therefore, the detailed stress analysis of the pressure vessel connecting portion is to ensure the safe operation of essential content. In general, in the pressure vessel subjected to internal pressure only, in the design process mostly only calculated according to Hajime thick inner pressure and check their strength, if the pressure in the cylinder in the process, being part of the local alloy head of the external load, such as taking over the alloy head with an upper transfer the weight of the load equipment, wind loads, seismic loads, and eccentric loads, etc., this mantis processing load acting on the bearing pressure, tension or bending moment, or several of the forces and moments of force in this case, using the traditional theoretical calculation can not answer this pressure will force the alloy head, what impact the cylinder alloy head and the high stress area connection. Simplified and alloy head joints of pressure vessels in general, due to the geometry of the discontinuity, the maximum stress occurs in the cylinder alloy head and the connecting portion of the inner surface. When coupled with two symmetrical bearings, must withstand external loads and moments on the alloy head with the holder, the holder and the connection alloy head will stress concentrations, the maximum stress occurs in the seat and alloy head connection the angular position, but it is still small relative to the maximum stress in the cylinder alloy head and connecting parts, that is the entire container structure, the maximum stress joints still appear in English and alloy head. Not affect the size and distribution of stress and bearing stress generated at the connection with the alloy head of the cylinder alloy head and the connecting portion. In order to improve the stress status of the cylinder alloy head and the connection area, a number of measures can be improved, such as the design of a transitional ring at the junction of the alloy head and simplified.

What is elliptical head Elliptical head, also known as elliptical head oval head, oval head, is composed of two parts rotating ellipsoidal and cylindrical straight segments of the head. Ellipsoidal bus than the rotation length, minor axis of 2.0 elliptical head, known as the standard oval head customary. Mechanical properties of elliptical head behind hemispherical head, but better than the dished head. Because between the hemispherical and dished head depth is between elliptical head, stamping equipment and tooling requirements are also difficult to manufacture in between, that is easier than hemispherical head, dished head than difficult. Elliptical head due to better overall performance, is widely used in low-pressure containers. In recent years, due to the spin suppress the removal process for the manufacture of large-diameter oval head to bring the convenience.

What is dished head Dished head, also known as hemming with spherical head. Consists of a sphere, a cylinder of a straight edge height and radius of curvature of connecting these two portions is substantially less than the radius of the spherical part of the composition of the transition. Dished head as a continuous surface, at the junction of three parts, the radius of curvature of the warp mutations, due to changes in curvature, therefore there is bending stress. Bending stress and tensile stress superposition result, the stress this part protruding from the rest. Compared with oval head, uniform stress distribution which is better, but easier than working, which is not ideal in engineering use. But when the head of the oval mold is difficult, then replaced with a dished head. What are the most commonly used stainless steel dished head 1, 304 stainless steel dished head, suitable for use in outdoor environment 2, 321 stainless steel dished head, suitable for the environment with high resistance to corrosion; 3, 316L stainless steel dished head, suitable for the use of high temperature corrosion resistance; 4, 310S stainless steel dished head, suitable for use under high temperature conditions Stainless steel plate is commonly used in the head of these materials, of course, there are some 2205, 309, and other stainless steel. How to identify the stainless steel dish head material is up to the standard Nowadays, stainless steel dish head price more and more transparent, which leads to many unscrupulous businessmen, shoddy, weeding, like 304 use 301 material instead to earn a profit, so how to distinguish whether the material standards? 1, the use of stainless steel syrup to test 2. Chemical composition analysis by spectrometer 3, salt spray test, simulation of the actual use of the environment. The liquid medicine test is the most used and most convenient, the spectrometer cost is higher.

What is conical head Conical head is a member of the container (at right) Depending on the geometry, can be pided into spherical, oval, dish, of spherical, conical shell Peace cover several, wherein the spherical, oval, dish, of spherical head and referred to as convex head. Equipment used in a variety of containers, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment. Processing range: 0 ° -180 ° carbon steel pipe, stainless steel, alloy steel pipe and steel ring-type heat and simmer, cold-formed production. And it can be processed by a plurality of curved pipe bends and more space. Machining diameter: ∮76mm-∮325mm; Thickness: 3.5mm-30mm. Head uses head petrochemicals, atomic energy to important parts of many food and pharmaceutical industry equipment, pressure vessels indispensable. Conical head is the cap on the pressure vessel, the pressure is a major part of the pressure vessel. Conical head of quality is directly related to the long-term safe operation of the pressure vessel.

What is spherical head The spherical head, is based on the spherical part of the spherical shell formed by the head, a hemispherical head and the ball head two without folding. Material: 304,304L, 321,316,316L, 310S and other materials. Executive Standard: JB / T4746-2002 Features: forging excellent, smooth surface, acid and alkali, high temperature, appearance, texture and strong performance. Spherical head Description: Its name as a spherical shape, named for the spherical head ball head is precision CNC machining type lathe, lathe finishing, welding and other processing. Note the use of the spherical head points occasions: 1. Carbon steel head will crack occurs in nitrates, ammonia, sodium and other alkaline environment, please note when ordering head eliminate the residual stress. 2. The austenitic stainless steel in chloride ions particular environment will occur stress corrosion cracking, select the appropriate material at design time. 3. The need galvanized or aluminized steel container, please do the heat treatment, the removal of residual stress. Compared with other forms of spherical head, the diameter and pressure of the same conditions, the required thickness of the smallest, the same size of the head of the same surface area of the smallest, the most used materials, the force is very uniform. However, due to the manufacturing difficulties, in general, in addition to the higher pressure, the larger diameter of the pressure vessel, the other containers are less.