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Butt welding elbow pipe fittings first use CAD skills to design a variety of different diameters, and within 180 degrees, different raw materials butt welding elbow pipe fittings with tube core and core head. Secondly, the structure of the large pushing machine is reformed to make the production ready to reach the technical requirements of the special large diameter thin-wall high temperature and high pressure special raw material elbow pipe. Then the special raw material pipe fitting is blanked according to the required size, and hoisted into the large push machine, and the pipe fitting is pushed to produce the large-caliber thin-wall high-temperature and high-pressure special elbow pipe fitting within 180 degrees from various viewpoints. The pushing method of large diameter elbow pipe fittings is characterized in: First choose CAD skills designed within 180 degrees butt welding elbow pipe with pipe core and core head, then on the big push machine structure transformation, the production equipment dedicated to push system of large-scale thermal power plants of large diameter thin-walled high temperature, high pressure, special materials of elbow pipe fittings skills requirements, and then the special raw material pipe materials according to the required size, and into a large machine, pipe fittings Push the production of various points of view within 180 degrees of large-caliber thin-wall high temperature and high pressure resistant special elbow pipe fittings. The raw material of rolling butt welding elbow pipe fitting is round tube blank. Round tube embryo is cut by cutting machine, and the blank with a growth degree of about one meter is processed, and sent to the furnace for heating by conveyor belt. The billets are fed into a furnace to be heated at about 1,200 degrees Celsius, fueled with hydrogen or acetylene. The temperature control in furnace is the key problem. After the round tube billet comes out of the oven, it must go through the pressure punch. After perforation, the round tube is successively rolled by three rolls, cross – rolled or kneaded. After kneading, take off the pipe and size. CANGZHOU WILSON PIPELINE The sizing machine rotates at high speed through the conical drill bit to drill the steel embryo and form the pipe fittings. The inner diameter of pipe fitting is determined by the outer diameter length of the drill bit of the sizing machine. After sizing, the pipe fittings enter the cooling tower and are cooled by water spraying. After cooling, the pipe fittings shall be straightened. After straightening, pipe fittings are sent by conveyor belt to metal flaw detector (or hydrostatic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. Butt welding elbow pipe fittings pipe fittings after quality inspection after strict manual selection. After quality inspection, paint on the serial number, specification, production batch number, etc.

The long weld neck flange of pressure vessel is optimized through two specific examples, and the effects of cone neck height and flange thickness on the three main stresses of flange axial stress, radial stress and tangential stress are analyzed. The calculation results show that when the flange thickness and cone neck height are adjusted to be similar, the three main stress values are close to the full stress value. This optimized design makes the flange compact in structure, reasonable in force, reduces the weight, and can significantly reduce the flange cost. For long weld neck flanges with small diameter and low pressure, on the premise of ensuring that the slope of flange cone neck section is less than 1:3, the flange can not have straight edge section. Optimal design of long weld neck flange Long weld neck flange is the most commonly used equipment flange in pressure vessels. Although NB/T 47023-2012 standard [7] gives the long weld neck flange of carbon steel and low alloy steel pressure vessels with nominal pressure of 0.6 ~ 6.4MPa and working temperature of – 70 ° C ~ 450 ° C, the flange, stud, nut and backing sheet materials need to be fully implemented according to the matching table and correction table in the standard, which is subject to many restrictions, Moreover, in engineering practice, many long weld neck flanges are beyond the scope of NB/T 47023-2012 standard, such as stainless steel flange or long weld neck flange with working temperature exceeding 450C, which shall be in accordance with GB/T 150 3-2011 design and calculation of non-standard flange. Through two specific calculation examples, the author optimizes the design of UNS S30408 long weld neck flange and 15crmo long weld neck flange, analyzes the effects of cone neck height and flange thickness on the three main stresses of flange axial stress, radial stress and tangential stress, and gives suggestions on the optimal design of long weld neck flange, which can be used as a reference for relevant designers of pressure vessels. In addition, the author also draws lessons from the flange design schemes of some large design institutes and engineering coMPanies. For the long weld neck flange with small diameter and low pressure, it is recommended that the flange design should not have straight edge section, but according to GB/T 150 3-2011 it is required to ensure that the slope of flange cone neck section is 31:3, which can significantly reduce the flange cost. The flange material of a vessel is s30408 and the design temperature is 300C; Design pressure: 2.6MPa; The specification of butt barrel is dn1000x14mm, and the winding pad is selected: M = 3.0, y = 69MPa; The allowable stress of flange under normal temperature [0] = 137MPa, the allowable stress of flange under design temperature [0] / = 85MPa, the material of stud is 35CrMoA, the specification is M30, the quantity is 48, and the corrosion allowance is not considered. Firstly, the author designs and calculates with reference to the overall dimensions of NB/T 47023-2012 standard equipment flange. The outer diameter of the flange is 1215mm, the inner diameter of the flange is $1000mm, the diameter of the bolt circle is 1155mm, the effective thickness of the flange is 100mm, the height of the cone neck is h = 42mm, the effective thickness of the large end of the neck is G1 = 36mm, and the effective thickness of the small end of the neck is G0, which is taken as the thickness of the butt cylinder 14mm. After preliminary calculation, the axial stress 0h = 199.25MPa > 1.5 [called /, comprehensive stress max (0.5 (0h + 0r), 0.5 (0h + 0t)) = 136.01MPa > [0h] /, and the flange strength is unqualified. At this time, some designers will blindly increase the flange thickness until it is qualified, which is not desirable. Blindly thickening the flange will cause material waste and unreasonable stress on the flange. When the axial stress is too large or too small, the method of adjusting the size of the cone neck shall be adopted, and the thickness or height of the cone neck can be adjusted. The maximum value of the axial stress is usually located on the section of the small end of the cone neck, which can be judged from the coefficient F. the coefficient f is the stress at the small end of the cone neck. When f is greater than 1, the maximum stress is at the small end of the cone neck. When f is less than or equal to 1, the maximum stress is at the large end of the cone neck. In this example, in order to facilitate docking with the cylinder, the thickness of the small end of the cone neck is taken as the thickness of the cylinder without adjustment; the effective thickness of the large end of the cone neck shall be in accordance with the provisions of the minimum value of La in table.1 in GB/T 150.3. Table.1 Cone neck heighth/ mmAxial stress is calculated/MPaAllowable axial stress value/MPaRadial stress is calculated/MPaAllowable radial stress value/MPaThe tangential stress is calculated/MPaAllowable tangential stress value/MPaComprehensive stress calculation value/MPaCombined allowable stress value/MPaCheck the results55167.82127.518.298564.8585116.3485Unqualified65143.75127.519.278559.7185101.7385Unqualified75120.8127.520.118555.348588.0785Unqualified78114.22127.520.348554.168584.1985Qualified It can be seen from the stress calculation results in Table.1 that after increasing the cone neck height, the axial stress value decreases significantly, the tangential stress value also decreases, and the radial stress value increases slightly. When the cone neck height increases to 78mm, the flange is checked and qualified, but is this the optimal design? In the above calculation process, the author only increases the cone neck height, and the flange thickness is not adjusted. The flange design should follow According to the full stress design principle, the axial stress and radial stress in the above calculation are close to the full stress value. Through further adjustment and calculation of the flange thickness and cone neck height, the author concludes that when the flange thickness is 90mm and the cone neck height is 84mm, the axial stress 0h = 116.04MPa, the tangential stress 0t = 52.25MPa, the axial stress and tangential stress value and the flange thickness are 100mm and the cone neck height is 78m M is basically the same, the radial stress 0r = 27.92MPa, and the radial stress value increases slightly. The flange thickness is reduced, the flange weight is significantly reduced, the flange cost can be significantly reduced, and the stress is reasonable. In the process of pressure vessel design and verification of several projects, the author found that some large design institutes and engineering coMPanies do not have straight edge segments in flange design, especially for long weld neck flanges with small diameter and low pressure. According to the provisions of GB/T 150.3 and JB4732 standards, long weld neck flanges can not have straight edge segments on the premise of ensuring the slope of flange cone neck section of 2:3, which is difficult to calculate The effective thickness of the small end of the flange neck is the thickness of the butt cylinder. The author also understands that the main purpose of the design institute’s design is to save flange materials, which is particularly important for the pressure vessel manufacturer. If the flange structure can be optimized, the flange cost can be significantly reduced. Moreover, in the actual production and manufacturing process, the groove type of the flange is often determined by the welding process , if there is no straight edge section, the thickness of the small end of the flange neck can be the same as that of the butt cylinder. In this way, whether the outer slope or the inner groove is adopted, it can ensure the inner flush during assembly, which is conducive to welding and does not need thinning treatment, which greatly improves the production efficiency. Flange optimization design is a complex and tedious process, and different designers often have different calculation results, but flange design must follow the principle of full stress, and give full play to the strength performance of flange materials through full stress optimization design. Through the above two examples, the author analyzes the three main stress values of flange, and adjusts the cone neck size and flange thickness respectively The design results that each stress value is close to the full stress are obtained. This optimal design makes the flange coMPact, reasonable stress and light weight. Therefore, the optimal design of the flange has obvious economic benefits. more   www.wilsonpipeline.com

Sometimes you need to figure out carbon equivalents fast, especially when you’re under a time crunch to get a pipe order in. That’s why American Piping Products is proud to offer its free online Carbon Equivalent Calculator to all those needing quick answers while at your desk or out in the field. A successful and secure weld depends on knowing the combined relationship of the alloying elements to the carbon in the steel pipe you’re using. This relationship (CE) helps the welders or engineers know if preheating or other processes are required for a quality connection. Our Carbon Equivalent Calculator helps you to quickly determine the answer by allowing you to enter the percentages of the different alloys that make up the steel pipe and receive a CE value with just a click of the Calculate button. CANGZHOU WILSON PIPELINE manufacture of flange fittings&pipes “Offering customers solutions to their problems is critical for our company’s growth,” said Walter Lucas, Vice President of Material Management at American Piping Products. “Answers make our customer’s jobs easier. This online calculator, along with our other online resources, brings value to our customers.” Our Carbon Equivalent Calculator is a fantastic addition to the collection of online tools from Wilson pipelline Products. and let Wilson pipeline Products find the right pipe for your project.

As we know steel pipe coupling is a short pipe or tube that with threads on both ends, used to connect pipelines. So It is a kind of pipe fittings that with threaded connection, the advantage is easy for pipeline maintenance or to replace the broken pipe CANGZHOU WILSON PIPELINE manufacture of flange fittings&pipes What is API coupling used for? To be simple, it is the internally threaded cylinder for joining two lengths of threaded pipe. With this purpose, API 5CT standard coupling plays an important feature in connecting casing and tubing line pipes. On the contrary, the biggest different with general steel pipe coupling is: API coupling manufacturing processes is more rigorous, requires a precisely control in the different processes as blew listed. Raw material selection Mechanical test including tensile strength Impact test Chemical properties control Sulfide stress cracking test (for Material grades in C90 or T95) Size tolerances, OD, Wall Thickness, Length and Straightness Threads control, threads quantity per inch, threads angle etc (Premium threads option will be more rigorous) Heat treatment Additional markings Material certification Product Specification Level (PSL-2 or PSL-3) API coupling specification As we told, one of the important figure of API coupling, that it shall be made of seamless, another is the same grade as the casing or tubing pipe body, and these materials are used for manufacturing the blank coupling. Coupling should be processed from coupling blanks or from coupling stock, including manufactured in hot forging. (Except Grade C110 and Q125 couplings shall not be in hot forging. These two grades material are typically different from other grades, so if you are purchasing couplings in this grades, should pay more attention to read regulations in API 5CT spec.) API Coupling raw material type Coupling raw material called as or divided to: • Coupling stock • Coupling material • Coupling blanks • Accessory material All of these could be taken as the unthreaded material used to produce an individual coupling.

Understanding steel grades for piping procurement from WILSON PIPELINE As industrial processes and applications have matured, industry organizations have developed unique classifications and specifications for the pipe destined for service in those sectors. There’s lots of overlap among the organizations’ published specs, and likely lots of confusion as well. Buyers can improve their purchasing experience by learning more about how grades of steel are designated for piping and by understanding all the information that should be included on a purchase order. ASTM and ASME Both the American Society of Testing and Methods (ASTM) and the American Society of Mechanical Engineers (ASME) publish piping specs. ASTM and ASME pipe designations for grades of steel are very similar. For example, A106 B is a spec published by ASTM (the ASME spec would be SA106 B). The “A” designates a ferrous material. ‘106’ is an arbitrary number that designates it as a seamless carbon steel pipe suited for high-temperature service. Then, grades (such as A, B or C) are assigned that indicate certain characteristics of the steel based on differences in its chemical makeup and mechanical properties. Pipe sizes are described by using a pipe chart (ANSI/ASME B36.10 and API5L) that includes the outside diameter and wall thickness. The outside diameter can be referred by the nominal pipe size (NPS) or the actual dimension in inches and the wall by stating the schedule or the actual thickness in inches. Note that while ASTM and ASME specs are largely identical, an important difference is that pipe meant for use in pressure systems sometimes requires different or additional quality tests before it complies with the ASME standard. American Piping Products stocks a full range of A/SA106 and A/SA 53 carbon steel pipe. CANGZHOU WILSON PIPELINE manufacture of flange fittings&pipes AISI and SAE The American Iron and Steel Institute (AISI) and the Society of Automotive Engineers (SAE) share a numbering system to classify steels. AISI/SAE designations only describe the chemical makeup of a steel. They do not include manufacturing, heat treating or testing information. Using 1020 steel as an example, the first digit expresses the steel as a plain carbon steel. The second digit indicates there are no added alloys. The last two digits indicate the steel has around 0.20 percent carbon content. For another example, a popular steel in the piping industry is 4130. The ’41’ indicates the steel contains chromium and molybdenum alloys. The ’30’ indicates the steel has around 0.30 percent carbon content. Again, AISI/SAE designations only classify steels. For example, a buyer who says, “I need 100 feet of 4130” has not provided enough information. The buyer also needs to note specific production and testing information found in an ASTM or ASME spec to get exactly the pipe they need. API Pipe for use in the oil & gas industry are classified by the American Petroleum Institute’s (API) system. API 5L is the most common standard to which line pipe in the oil and natural gas industry is rated. Because that’s merely a standard, additional information is needed to ensure purchase orders are executed accurately. API 5L pipe is broken down into PSL1 and PSL2 delivery conditions; those conditions are further broken down into pipe grades, i.e. Grade B, X42, X52, X65, etc. Buyers should include the combination of the overarching standard, the delivery condition and the grade for the API5L pipe they need. Study grades of steel Buyers who place incomplete or inaccurate orders put their operations at risk of delays or cost overruns. When in doubt, consult with an engineer and refer to the industry standards that govern your application. Also be aware of other factors that play into your purchase: What manufacturer restrictions are in place that may impact your order? Are there any origin restrictions that you need to follow when buying? What pipe lengths and end finishes do you need? Are there specific chemistry requirements needed for the application? Are there age restrictions that may impact your order for export? Suppliers need detailed purchase orders to ensure you get the right pipe the first time. #flangefittingsAPI5L

Characteristics of reducing tee fittings 1. Variable diameter tee fittings have excellent corrosion resistance.  The thin and consolidated oxide film of stainless steel gives stainless steel excellent corrosion resistance in all water, even in ground.  Therefore, it is suitable for all kinds of water quality, in addition to disinfection and sterilization, do not need to control the water quality, there is no corrosion and excessive exudate, can maintain water purity and health, root out secondary pollution, can enjoy the impact of high water flow up to 30 meters per second. 2. Reducer tee pipe fittings have excellent mechanical and physical functions.  Stainless steel pipe strength is very high, it is 2 times of galvanized pipe, 3 times of copper pipe, 8-10 times of PP-R pipe, can very well taste the shock of vibration, with no water leakage, not burst, fire prevention, earthquake characteristics, and therefore very safe and reliable;  Good heat preservation function, especially suitable for hot water transportation. 3. Long service life of variable diameter tee pipe fittings.  Field corrosion test data indicate that the life of stainless steel water pipe can reach 100 years, almost do not need protection, therefore, its function price ratio is very good, the cost of operation life is low, economic benefit is obvious.

Butt welding elbow pipe fittings first use CAD skills to design a variety of different diameters, and within 180 degrees, different raw materials butt welding elbow pipe fittings with tube core and core head.  Secondly, the structure of the large pushing machine is reformed to make the production ready to reach the technical requirements of the special large diameter thin-wall high temperature and high pressure special raw material elbow pipe.  Then the special raw material pipe fitting is blanked according to the required size, and hoisted into the large push machine, and the pipe fitting is pushed to produce the large-caliber thin-wall high-temperature and high-pressure special elbow pipe fitting within 180 degrees from various viewpoints. The pushing method of large diameter elbow pipe fittings is characterized in:    First choose CAD skills designed within 180 degrees butt welding elbow pipe with pipe core and core head, then on the big push machine structure transformation, the production equipment dedicated to push system of large-scale thermal power plants of large diameter thin-walled high temperature, high pressure, special materials of elbow pipe fittings skills requirements, and then the special raw material pipe materials according to the required size, and into a large machine, pipe fittings  Push the production of various points of view within 180 degrees of large-caliber thin-wall high temperature and high pressure resistant special elbow pipe fittings. The raw material of rolling butt welding elbow pipe fitting is round tube blank. Round tube embryo is cut by cutting machine, and the blank with a growth degree of about one meter is processed, and sent to the furnace for heating by conveyor belt.  The billets are fed into a furnace to be heated at about 1,200 degrees Celsius, fueled with hydrogen or acetylene.  The temperature control in furnace is the key problem.  After the round tube billet comes out of the oven, it must go through the pressure punch.  After perforation, the round tube is successively rolled by three rolls, cross – rolled or kneaded.  After kneading, take off the pipe and size. CANGZHOU WILSON PIPELINE The sizing machine rotates at high speed through the conical drill bit to drill the steel embryo and form the pipe fittings.  The inner diameter of pipe fitting is determined by the outer diameter length of the drill bit of the sizing machine.  After sizing, the pipe fittings enter the cooling tower and are cooled by water spraying. After cooling, the pipe fittings shall be straightened.  After straightening, pipe fittings are sent by conveyor belt to metal flaw detector (or hydrostatic test) for internal flaw detection.  If there are cracks, bubbles and other problems inside the steel pipe, it will be detected.  Butt welding elbow pipe fittings pipe fittings after quality inspection after strict manual selection.  After quality inspection, paint on the serial number, specification, production batch number, etc.

How to check the welding quality of elbow pipe fittings？ 1. Appearance inspection of elbow pipe fittings: generally, the naked eye survey is the main method. Through appearance inspection, it can find the appearance defects of welding elbow pipe fittings, and sometimes use 5-20 times magnifying glass to investigate.  Such as edge biting, porosity, welding tumors, surface cracks, slag inclusion and penetration, etc.  The shape dimension of the weld can also be measured by the welding detector or sample. 2. Nondestructive inspection of elbow pipe fittings: inspection of slag, porosity, cracks and other defects hidden in the weld.  X – ray inspection is to use X – ray to take pictures of the welding seam, according to the negative impression to determine whether there are internal defects, the number and type of defects.  Now the most widely used is the selection of X-ray inspection, as well as ultrasonic inspection and magnetic inspection.  Then according to the product skill requirements to identify whether the weld is qualified.  At this point, reflected waves appear on the screen.  According to the comparison and identification of these reflected waves with normal waves, the size and location of the defect can be determined.  Ultrasonic flaw detection is much simpler than X-ray, so it is widely used.  However, ultrasonic inspection can only be judged by the operation experience, and can not leave the inspection basis.  The ultrasonic beam is sent from the probe into the metal, and when it reaches the metal-air interface, it refracts and passes through the weld.  If there are defects in the weld, the ultrasonic beam will be reflected to the probe and be borne, for the internal defects of the weld surface is not deep and the appearance of the very small cracks, magnetic flaw detection can also be used. CANGZHOU WILSON PIPELINE supply flange fittings&pipes 3. The mechanical properties of elbow pipe test: nondestructive testing can find the inherent defects of the weld, but can not clarify the mechanical properties of the metal in the heat affected zone of the weld, so sometimes to make tension, impact, bending and other experiments on the welded joint.  These experiments are done by the experimental board.  The test plate used is best welded together with the longitudinal seam of the cylinder to ensure consistent construction conditions.  Then the mechanical properties of the test plate are tested.  In practice, only the welding joints of new steel are tested in this respect. 4. Elbow pipe pressure test and pressure test: for the pressure vessel sealing requirements, water pressure test and (or) pressure test, to check the sealing and pressure ability of the weld.  The method is to inject 1.25-1.5 times the working pressure of water or equal to the working pressure of gas (mostly with air) into the container, stay for a certain time, and then investigate the pressure drop in the container, and investigate whether there is leakage outside, according to these can identify whether the weld is qualified.

What is the slip resistance of flat welded flange fittings? The useful fitting area overcomes the defect that the cast iron flanged pipe fittings are in point or line fit with the steel pipe, and eliminates the danger of the steel pipe slipping.  In the same way, WILSON PIEPLINE has paid great attention to product quality over the years, regarded product quality as the foundation of the company’s production, and produced equal flat welding flange fittings with excellent quality, occupying a place in the field of pipe fittings. The continuous improvement of quality requires the integration of a lot of experience and technology, so the company has invested endless funds and human resources in product research and development, starting from improving the product’s own ability, and has made remarkable achievements in the technology of pipe fittings. CANGZHOU WILSON PIPELINE manufacture of  flange fittings&pipes Although the flat welding flange pipe fittings market is much more standardized than before, as long as we stick to the quality, strictly control the quality of products, let customers trust WILSON PIPELINE manufacturing, we can certainly go higher and higher in the field of pipe fittings.

roducts Description Main Indexs of Pre-insulated Pipe Product Name Product Indexes Reference Standard Unit Standard Requirement Finished product Steel pipe without thermal insulation layer CJ/T114-4.4.1 mm 150-250 Increasing rate of HDPE outer protection pipe CJ/T114-4.4.2 % ≤ 2 Axis eccentricity CJ/T114-4.4.3 mm see clause 4.4.3 Expectation of life CJ/T114-4.4.4.1 year 120℃ 30 years Shear strength(170℃，1450h after aging) CJ/T114-4.4.4.2 MPa (23±2℃）>0.12 (140±2℃) >0.08 Shock resistance CJ/T114-4.4.5 3kg/2m see clause 4.4.5 Resistance value between alarm line CJ/T114-4.4.6 MΩ more than 20MΩ Outer protection pipe Density CJ/T114-4.2.3.1 kg/m3 ≥940 Elongation at break CJ/T114-4.2.3.4 % ≥350 Tensile yield stength CJ/T114-4.2.3.4 MPa ≥19 Longitudinal shrinkage rate CJ/T114-4.2.3.5 % ≤3 Long term Mechanical properties CJ/T114-4.2.3.6 80℃ 4.0MPa >1500h free from damage The difference of the melt flow rate CJ/T114-4.2.3.2 g/10min ≤0.5 Carbon Black content CJ/T114-4.2.3.1 % 2.5±0.5 Polyurethane insulation layer Density CJ/T114-4.3.2 kg/m3 ≥60 Average pore size CJ/T114-4.3.1 mm ≤0.5 Percentage of close area CJ/T114-4.3.1 % ≥88 Compressive strength CJ/T114-4.3.3 MPa ≥0.3 Water absorption CJ/T114-4.3.4 % Immersion in boiling water 90 minutes, bubble water absorption should be not more than 10% Coefficient of thermal conductivity before aging CJ/T114-4.3.5 w/(m.k) ≤0.033 Cavity CJ/T114-4.3.1 ≤1/3 the thickness of insulation layer Working steel pipe Seamless steel pipe(≤DN150) GB8163 20#, X42,X52,X60,X70 Up to standards Spiral steel pipe (≥DN200) GB/T9711 or SY/T5037 Q235B,Q355B,X42,X52,X60,X70 Up to standar RELATED PRODUCTS Quick view CLOSE high density polyurethane insulation coating hdpe outer jacket steel Lagging insulation steel pipe Quick view CLOSE Lagging insulation steel pipe heat keep pipe Lagging insulation steel pipe

ASTM A234 WP11 Alloy Steel Buttweld Pipe Fittings Cangzhou wilson pipeline sales@wilsonpipeline.com Is A Leading Supplier For Your ASTM A234 Alloy Steel WP11 Buttweld Pipe Fittings Needs. Cangzhou wilson pipeline sales@wilsonpipeline.com manufacturer A234 WP11 fittings made from high quality alloy steel to ASTM A234 which can be used in various piping systems. The advantages of butt weld include: Welding a fitting to the pipe means that it is permanently leak proof. The continuous metal structure formed between the pipe and fitting adds strength to the system. Smoother inner surface and gradual direction changed reduce the pressure losses and turbulence and minimises the action of corrosion and abrasion. A welded system utilises minimal space. ASTM A234 WP11 Pipe Fittings Types Elbows, Long Radius Elbow, Short Radius Elbow, Bend, Long Radius Bends, Piggable Bends, Tee, Equal Tee, Reducing Tee, Cross, Reducer, Concentric Reducer, Eccentric Reducer, Pipe End Caps. ASTM A234 WP11 Pipe Fittings Dimensions ASTM A234 WP11 Pipe Fittings Weight ASTM A234 WP11 PIPE FITTINGS Specification Scope ASTM A234 covers wrought carbon steel and alloy steel fittings of seamless and welded construction covered by the latest revision of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. Process Killed steel, with forgings, bars, plates, sheet, and seamless or fusion-welded tubular products with filler metal added. Forging or shaping operations performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations. Heat Treatment After forming at an elevated temperature, fittings are cooled to a temperature below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. Heat treatment temperatures specified are metal (part) temperatures. Heat-treated fittings are to be treated according to paragraph 7 in Specification A960/A960M. ASTM A234 WP11 Pipe Fittings Chemical Requirements Composition, % WPB B,C,D,E,WPC C,D,E,WP11 CL1WP11 CL2,WP11 CL3WP22 CL1,WP22 CL3WP5 CL1,WP5 CL3Carbon0.30.350.05–0.150.05–0.200.05–0.200.05–0.150.05–0.150.150.15Manganese0.29–1.060.29–1.060.30–0.600.30–0.800.30–0.800.30–0.600.30–0.600.30–0.600.30–0.60Phosporus0.050.050.030.040.040.040.040.040.04Sulfur0.0580.0580.030.040.040.040.040.030.03Silicon0.10 min0.10 min0.50–1.000.50–1.000.50–1.000.50.50.50.5Chromium0.40.41.00–1.501.00–1.501.00–1.501.90–2.601.90–2.604.0–6.04.0–6.0Molybdenum0.15 max0.15 max0.44–0.650.44–0.650.44–0.650.87–1.130.87–1.130.44–0.650.44–0.65Nickel0.40.4…………………Copper0.40.4…………………OthersVanadium 0.08Vanadium 0.08…………………WP9 CL1,WP9 CL3WP91Carbon0.150.150.08–0.12Manganese0.30–0.600.30–0.600.30–0.60Phosporus0.030.030.02Sulfur0.030.030.01Silicon110.20–0.50Chromium8.0–10.08.0–10.08.0–9.5Molybdenum0.90–1.100.90–1.100.85–1.05Nickel……0.4Copper………Others……Vanadium 0.18–0.25 Columbium 0.06-0.10 Nitrogen 0.03-0.07 Aluminum 0.02F Titanium 0.01F Zirconium 0.01F B Fittings made from bar or plate may have 0.35 max carbon.A When fittings are of welded construction, the grade and marking symbol shown above shall be supplemented by letter “W”. C Fittings made from forgings may have 0.35 max carbon and 0.35 max silicon with no minimum. D For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted, up to a maximum of 1.65 %. E The sum of Copper, Nickel, Chromium, and Molybdenum shall not exceed 1.00 %. F Applies both to heat and product analyses. ASTM A234 WP11 Pipe Fittings Mechanical PropertiesWPBWPC, WP11-CL2WP11-CL1, WP22-CL1 WP5-CL1 WP9-CL1WP11-CL3, WP22-CL3 WP5-CL3 WP9-CL3WP91Tensile strength, minimum unless a range is given ksi (MPa)60 (415)70 (485)60 (415)75 (520)90 (620)Yield,strength, min ksi (MPa) (0.2% offset or 0.5% extension under-load)35 (240)40 (275)30 (205)45 (310)60 (415) ElongationWPB, WPC, WP11, WP22WP91LongitundinalTransverseLongitundinalTransverseStandard round specimen, or small proportioanl specimen, min % in 4 D22142013Rectangular speicmen for wall thickness 5/16″ and over, and for all small sizes tested in full section; min % in 2 in.3020 ARectangular speicimen for wall thickness less than 5/16″; min % in 2 in (1/2″ wide specimen)BB A WPB and WPC fittings manufactured from plate shall have a minimum elongation of 17 %. B For each 1⁄32 in. [0.79 mm] decrease in wall thickness below 5⁄16 in. [7.94 mm], a deduction of 1.5 % for longitudinal and 1.0 % for transverse from the values shown above is permitted Reference Documents ASTM A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service ASTM A217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service ASTM A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings ASME B16.9 Steel Butt-Welding Fittings ASME B16.11 Forged Steel Fittings, Socket Welding and Threaded RELATED PRODUCTS Quick view CLOSE ASTM A403 WP304L Steel Pipe Fitting CAP Cap