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Duplex Steel (UNS S32205 / UNS S31803) Pipes & Tubes in form of Seamless Pipes & Welded Pipes these availble grades with high quality. Specifications: ASTM A789 / ASME SA789 / ASTM A790 Range : ½ NB TO 24 NB IN SCH 20 , 30, STD, 40 , 60 , 80 , XS , 100 , 120 , 140 , 160 & XXS as Per NACE MR 01 75 Type: SEAMLESS / ERW / WELDED/ FABRICATED / LSAW End: Plain End, Bevelled End, Threaded Length: Single Random, Cut LengthDuplex 2205 / 1803 Pipes & TubesStandardsSeamless PipeASTMA 789ASMESA 789 Seamless TubeASTMA 790ASTMSA 790 Duplex Steel Pipes & Tubes Grades: Duplex Steel UNS S31803 Seamless Pipes Duplex Steel UNS S31803 Seamless Tubes Duplex Steel UNS S31803 Welded Pipes Duplex Steel UNS S31803 Welded Tubes Duplex Steel UNS S32205 Seamless Pipes Duplex Steel UNS S32205 Seamless Tubes Duplex Steel UNS S32205 Welded Pipes Duplex Steel UNS S32205 Welded Tubes Common Trade Name: AL-6XN Super Austenitic Stainless Steel. Standards: ASTM: A 240, A 276, A 479, A 789, A 790, A 182 (Grade F51), A 923 ASME: SA-240, SA-479, SA-789, SA-790, SA-182 (Grade 51), ASME Pgroup 10H. Chemical composition: NiCrMoMnSiCNSPFeMIN4.522.03.0–––0.14–––MAX6.523.03.52.01.00.030.20.020.03Balance Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. Theses all products are used in Oil & Gas Industries, Chemical Industry,Pressure Vessels, Bridges etc.

Carbon Steel Grade B A106 Seamless Pipes: Carbon Steel Grade B A106 Seamless Pipe known as ASME SA106 pipe. Carbon Steel Grade B A106 Seamless Pipes commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and shipsetc. This specification covers seamless carbon steel pipe for high-temperature service Sizes (Seamless): 1/2″ NB – 60″ NB Sizes (ERW): 1/2″ NB – 24″ NB Sizes (SAW): 16″ NB – 100″ NB Wall Thickness available: Schedule 20 – Schedule XXS (heavier on request) up to 250 mm thk. Material Grades: High Temperature Seamless PipesASTM A106 Gr. B/C, API 5L Gr. B, ASTM A53 Gr. BHeat Exchanger Seamless TubesASTM A179Low Temperature Seamless PipesASTM A333 Gr. 3/6Low Temperature Seamless TubesASTM A334 Gr. 6High Yield Seamless PipesAPI 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80 PSL-1/PSL-2High Yield Seamless PipesISO 3183 Gr.L245, L290, L320, L360, L390, L415, L450, L485Atmospheric & Low Temp EFW PipesASTM A671 Gr. CC60/CC65/CC70High Pressure & Moderate Temp EFW PipesASTM A672 Gr. B60/B65/B70/C55/C60/C65/C70High Yield ERW/SAW PipesAPI 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80 PSL-1/PSL-2High Yield ERW/SAW PipesISO 3183 Gr.L245, L290, L320, L360, L390, L415, L450, L485 Chemical Composition ASTM A106 Carbon Steel Pipes Grades Grade AGrade BGrade CTotal of Cr, Cu, Mo, Ni, and V shall not exceed 1%Carbon max. %0.250.300.35Manganese %0.27 to 0.930.29 to 1.060.29 to 1.06Phosphorous, max. %0.0350.0350.035Sulfur, max. %0.0350.0350.035Silicon, min.%0.100.100.10Chrome, max. %0.400.400.40Copper, max. %0.400.400.40Molybdenum, max. %0.150.150.15Nickel, max. %0.400.400.40Vanadium, min.%0.080.080.08 Outside Diameter at any point shall not vary from standard specified more than:NPS [DN Designator]OverUnderin.mmin.mm1/8 to 1-1/2 [6 to 40], incl1/64 (0.015)0.41/64 (0.015)0.4Over 1-1/2 to 4 [40 to 100], incl1/32 (0.031)0.81/32 (0.031)0.8Over 4 to 8 [100 to 200], incl1/16 (0.062)1.61/32 (0.031)0.8Over 8 to 18 [200 to 450], incl3/32 (0.093)2.41/32 (0.031)0.8Over 18 to 26 [450 to 650], incl1/8 (0.125)3.21/32 (0.031)0.8Over 26 to 34 [650 to 859], incl5/32 (0.156)4.01/32 (0.031)0.8Over 34 to 48 [850 to 1200], incl3/16 (0.187)4.81/32 (0.031)0.8 Tensile Requirements Seamless Grade AGrade BGrade CTensile Strength, min., psi48,00060,00070,000Yield Strength, min., psi30,00035,00040,000 Number of Tests Required NPSOn One Length from Each Lot ofTensile5 and smaller400 or less6 and larger200 or lessBending2 and smaller400 or lessFlattening2 through 5400 or less6 and over200 or less Carbon Steel ASTM A53 Seamless Pipes: Carbon Steel ASTM A53 pipe is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas, and air lines. It is suitable for welding, and suitable for forming operations involving coiling, bending, and flanging, subject to certain qualifications. This specification covers seamless carbon steel pipe for high-temperature services Sizes (Seamless): 1/2″ NB – 60″ NB Sizes (ERW): 1/2″ NB – 24″ NB Sizes (SAW): 16″ NB – 100″ NB Wall Thickness available: Schedule 20 – Schedule XXS (heavier on request) up to 250 mm thickness. Carbon Steel A33 Gr. 3/6 Seamless Pipes Chemical Requirements Composition, % ElementGrade 1Grade 3Grade 6Carbon, max0.300.190.30Manganese0.40 – 1.060.31 – 0.640.29 – 1.06Phosphorous, max0.0250.0250.025Sulfur, max0.0250.0250.025Silicon0.18 -0.370.10 minNickel3.18 – 3.82

Established in 2008, wilsonpipeline Pipe Industry Co., Limited is a professional organizer and one-stop-shop supplier for steel piping system products, including Stainless Steel SS 304/ 304L, SS 310/ 310S, SS 316/ 316L, SS 317/ 317L, SS 321, SS 904L grades in form of Flanges, Pipe Fittings, Buttweld Fittings,Threaded Fittings, Socket Weld Fittings, Fasteners, Pipes & Tubes, Sheets ,Plates, Round Bars, Olet Fittings and Bends etc. Stainless Steel Pipes & Tubes Stainless Steel Pipes & Tubes in these availble grades ASTM A312 TP304/L/H, 310/H, 316/L/H/Ti, 321/H, 347/H, 410, 904L with high quality. We also manufacture and export Stainless Steel Pipes & Tubes in other materials also like Nickel Alloys, Carbo Steel , Mild Steel, Alloy Steel etc. Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 Grades: 304/304L/304h,310/310S/310H,,316/316L/316H/316Ti, 317/I,321/321H,347/347H,904L.UNS S31803/S32760 Size: 1/2″ to 24″ Seamless upto 60″ in Welded Forms: Seamless Pipes & Tubes, Welded Pipes & Tubes Thickness: SCH 5S TO SCH 160 Stainless Steel Flanges Stainless Steel Flanges in these availble grades ASTM A/ASME SA213/A249/A269/A312/A358 with high quality Flanges like Weld Neck Flanges, Blind Flanges,Slip On Flanges,Threaded Flanges,Socket Weld Flanges. We also manufacture and export Stainless Steel Flanges in other materials also like Nickel Alloys, Carbo Steel , Mild Steel, Alloy Steel etc. Standards: AISI B16.5, AISI B16.47, AISI B16.36, MSS SP44, API6A, BS 4504, EN1092, UNI 2277/2278, DIN 4504 Grades:310S, 310, 309, 309S, 316, 316L, 316Ti, 317, 317L, 321, 321H, 347, 347H, 304, 304L, 302, 301, 201, 202, 405, 410, 420, 430, 904L etc. Size: 1/2″-100″ Forms: Blind Flanges, Slip on Flanges, Threaded Flanges, Spectacle Blind Flanges, Weld Neck Flanges etc. Thickness: SCH5S-SCH160, XS, XXS, STD Stainless Steel Pipe Fittings Stainless Steel Pipe Fittings in these availble grades ASTM A403 / ASTM A312/A213/A249/A240/A276/A403/A164 with high quality Butt-weld Fittings, Socket Weld Fittings, Threaded Fittings. We also manufacture and export Stainless Steel Butt-weld fittings, Stainlesss Steel Socket Weld Fittings ,Stainlesss Steel Threaded Fittings in other materials also like Nickel Alloys, Carbon Steel , Mild Steel, Alloy Steel etc. Standards: ASME, ANSI B1.9, MSS SP43, DIN2605, 2615, 2616, 2617, JIS B2311, 2312, 2313,EN 10253-1, EN 10253-2 Grades:310S, 310, 309, 309S, 316, 316L, 316Ti, 317, 317L, 321, 321H, 347, 347H, 304, 304L, 302, 301, 201, 202, 405, 410, 420, 430, 904L etc. Size: 1/2 NB – 48 NB Forms: Butt-weld Fitings , Forged Fittings(Threaded & Socket Weld) Thickness: SCH10S, XXS Stainless Steel Fastener Stainless Steel Fasteners like nuts, bolts, Washers, rings, stud bolts, Screw in these availble grades ASTM A/ASME SA213/A249/A269/A312/A358 with high quality. We also manufacture and export Stainless Steel Fasteners in other materials also like Nickel Alloys, Carbn Steel , Mild Steel, Alloy Steel etc. Standards: ANSI, DIN, AS, BS and etc Dia: 1/4-1″ (ANSI), M5-M56(DIN) Length: 5/8-14″(ANSI), 10-400MM(DIN) Grades: SS201.SS304.SS316.SS316L Range: M4 To M100

Butt welding neck flange: neck flange welding is often referred to as “high hub flange, its purpose is to transfer some of the pressure of pipeline, thereby reducing in Frankie high stress concentration. butt welding neck flange) is one of the best design butt that due to the existence of its own structural value flanges are provided, but the price is relatively high. The reason is that the product of complex production process. butt welding neck flange can be pided into flat butt welding neck flange, and wonderful butt welding flange. Butt welding flange connection consists of a gasket, 2 slices of butt welding flange and the composition of several bolt and nut. Butt welding flange interface of the pipe diameter and wall thickness as the pipe to be welded, meet two pipe welding, butt butt welding neck flange with straight edge thickness more than its butt joint of steel tube thickness more than 1 mm, straight section length should be at the inner diameter of the flange cut thin, cut thin section Angle should be less than or equal to 1:3. With the nominal pressure butt welding neck flange, around 1.0 MPa ~ PN25 MPa. PN10Mpa belongs to high pressure butt welding flange. The sealing effect is better, more widely, generally applicable to the temperature or pressure fluctuate dramatically pipe or high temperature, high pressure and low temperature pipes, also used for conveying expensive medium, flammable and explosive medium, toxic gas pipeline on the ring Junction surface high pressure flange can be used for flammable, explosive, toxic medium and higher pressure, high pressure butt welding flange sealing surface often made concave and convex surface, generally applicable to high temperature and high pressure and low temperature, temperature and pressure fluctuations on pipeline, also used for conveying inflammable, explosive medium, expensive medium pipeline.

(UNS S32205 / UNS S31803) Duplex Steel Flanges in these availble grades ASTM A182 / ASME SA182 with high quality Flanges like Weld Neck Flanges, Blind Flanges, Slip On Flanges, Threaded Flanges, Socket Weld Flanges. Standards: ASTM / ASME A/SA 182 Grades: F 44, F 45, F51, F 53, F 55, F 60, F 61 Size: ½” NB to 60” NB Class: 150LB,300LB,400LB,600LB,900LB,1500LB Types: Weld Neck Flanges, Slip On Flanges, Threaded Flanges, Socket Weld Flanges etc. Common Trade Name: AL-6XN Super Austenitic Stainless Steel. Standards: ASTM: A 240, A 276, A 479, A 789, A 790, A 182 (Grade F51), A 923 ASME: SA-240, SA-479, SA-789, SA-790, SA-182 (Grade 51), ASME Pgroup 10H. Chemical Composition:NiCrMoMnSiCNSPFeMIN4.522.03.0–––0.14–––MAX6.523.03.52.01.00.030.20.020.03Balance Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. Theses all products are used in Oil & Gas Industries, Chemical Industry,Pressure Vessels, Bridges etc.

(UNS S32205 / UNS S31803) Duplex Steel Pipe Fittings in these availble grades ASTM A815/ASME SA815 with high quality Butt-weld Fittings, Socket Weld Fittings, Threaded Fittings. Standards:  ASTM A 105/A694/ A350 LF3/A350 LF2. Grades: F 44, F 45, F51, F 53, F 55, F 60, F 61 Size: 1/2 NB – 48 NB Types: Butt-weld Fitings , Forged Fittings (Threaded & Socket Weld) Forms: Elbow 45 deg & 90 degree, Tee , Union, Full & Half coupling, Cross, Cap, Swage Nipple, Plug, Bush Thickness: SCH10S, XXS Common Trade Name: AL-6XN Super Austenitic Stainless Steel. Chemical Composition:NiCrMoMnSiCNSPFeMIN4.522.03.0–––0.14–––MAX6.523.03.52.01.00.030.20.020.03Balance Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. Theses all products are used in Oil & Gas Industries, Chemical Industry,Pressure Vessels, Bridges etc.

Because the flexible graphite has plasticity and good packing, when using this kind of gasket to precision machining of flange sealing surface does not need to match, for stainless steel flange sealing surface water; Groove can be adaptive, relatively economy. The gasket is also called flexible graphite composite gasket, metal it is made of salt tooth metal teeth or punching metal core board and flexible graphite particle composite pressure into a sealing gasket, it is usually composed of flexible graphite composite reinforced plate system, typical flexible graphite composite metal flange gaskets. According to the needs, flexible graphite composite metal flange gaskets can be made with stainless steel or carbon steel inner package edge or inside and outside. The main characteristic of the gasket is: good high and low temperature resistance, corrosion resistance, resistance to radiation, such as performance, high strength, can be used in high pressure conditions. The pre-tightening force than use metal gasket or small metal spiral wound gasket.

Alloy flange with alloy steel stud shall adopt high quality steel. The material mark after all should add letters A, such as 5CrMoA、25CrMoVA according to different structure, the bolt can be pided into hexagon head bolts and stud (also known as the stud) two kinds, the stud is pided into two kinds of harness and the harness. Alloy flange with hexagonal head bolt: often used with flat welding flange and non-metallic gaskets with milder conditions for operation. Commonly used material is BL3 or hexagonal head bolt is Q235B; Stud: often used with butt welding flange at the operating condition is harsh working conditions, among them, because there is no cross section shape on the harness type stud, so its bearing capacity is strong. Alloy flange with rather than type harness stud is relatively weak bearing capacity. Nut materials often according to and cooperate with bolt material, these combinations have provisions in the general standard. Under normal circumstances, the nut material should be slightly below the bolt, and ensure the nut hardness is lower than bolt hardness HB30 around.

In all kinds of pipe corrosion resistance of stainless steel flange is the best, because stainless steel flange and oxidant inactivation. On the surface form a layer of tough dense CR rich protective oxide film on Cr2O3, so as to effectively prevent the oxidation reaction of further. Stainless steel flange corrosion usually for the stainless steel flange pipe wall thinning, local pits and pock, stainless steel flange does not like carbon steel that uniform corrosion, without the use of the protective coating, stainless steel flange corrosion detection method is magnetic flux leakage method and ultrasonic testing method. One, the stainless steel flange standard definition of the thickness of the following: 1, effective thickness – is the nominal thickness minus the corrosion margin C2 and the thickness of the negative deviation of the thickness of the steel. 2, nominal thickness – is the thickness of the design thickness of D plus a negative deviation of the thickness of the C1 after the steel standard specification, that is, the thickness of the profiled flange pattern. 3, design thickness – is the sum of the thickness and corrosion allowance. 4, the thickness of the calculation is calculated by the formula of the thickness, when needed, should be included in the required thickness of other loads. Two, there are seven stainless steel flange derusting process need to understand: 1, first remove rust surface visible dirt, and then use solvents or cleaning agents to remove oil. 2, with the shovel knife to a large area of corroded steel. 3, with scraper and wire brush to remove the side corner of the corrosion. 4, use the file to remove the welding slag and other protrusions and various burrs. 5, the use of cloth and steel wire brush to clean up. 6, with a clean cloth, but also can be used to clean the solvent and the solvent to clean and timely painting primer. 7, pay attention to for yet fail the toughness of the coating may be preserved, and hit the old wool paint surface with emery cloth, grinding film defect into the axe and clean after direct painting. Finally, but also to understand the common sense of stainless steel flange vacuum seal, mainly rubber seal, metal seal and magnetic fluid seal. Among them, the metal seal can meet the requirements of ultra high vacuum, but there are the following disadvantages: metal seal ring elastic, great sealing force, the repeated use of very poor, flange sealing surface and the edge roughness and the fitting accuracy requirement is high, sealing ring and the flange material thermal expansion coefficient difference is big enough to cause the local deformation caused by leakage.

First, the advantages and disadvantages of stainless steel pipe fitting is introduced The advantages of stainless steel pipe fittings are as follows: the advantages of such as stainless steel elbow, tee, stainless steel pipe fittings due to easy to clean, beautiful appearance, does not rust and is widely used in various industries. The disadvantage of stainless steel pipe fittings are as follows: poor heat transfer, unless for bonded aluminum or copper base, thermal conductivity is very poor. This means that a cheaper stainless steel pipe fittings are not necessarily better than other products. Price is quite high, the stainless steel cookware is very good, can last a lifetime of time, many people think that this is a one-time purchase, worth the investment. Second, the Stainless steel pipe fittings welding technical requirements Due to the Stainless steel pipe fittings sizes, according to the welding of stainless steel pipe fittings unique place, as far as possible reduce the amount of heat input, the manual electric arc welding, argon arc welding is adopted two kinds of methods, d > Φ 159 mm adopts argon arc welding, manual arc welding surface. D ≦ Φ 159 mm all use argon arc welding. Stainless steel pipe fittings welding technical requirements are as follows: 1, manual electric arc welding, welding machine adopts dc reverse connection, when using dc argon arc welding is pick up; 2, before welding wire should be used on the surface of the stainless steel wire brush to brush off the scale, with acetone to wash; Electrode should be in 200-250 ℃ drying 1 h, as you take; 3, the workpiece before welding groove on both sides of the 25 mm within the scope of the clean up oil pollution and so on, with acetone to wash groove on both sides of the 25 mm; 4, argon arc welding, the nozzle Φ 2 mm in diameter, extremely rich tungsten tungsten electrode, specifications Φ 2.5 mm; 5, argon arc welding of stainless steel, the back must fill argon protection, to ensure forming on the back. Using the method of partial argon filling in the pipe flow for 5-14 l/min, positive argon gas flow is 12 13 l/min. Stainless steel pipe fittings in backing welding seam thickness should be thin as far as possible, and the roots of fusion, outstanding to into a gentle slope, arc extinguishing arc extinguishing shrinkage cavity, if any, polishing machine grinding. Must be within the groove arc arc, arc should fill arc crater and prevent the crack of arc crater. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

welding neck flange is also known as the welding neck flange, it differed from the slip on flange is from the flange to pipe welding of flange that has a long sloping high neck, the high cervical wall thickness along the height direction gradually transition to the pipe wall thickness, improve the force discontinuities, thus increasing the strength of flange. welding neck flange mainly used in the case of harsh conditions, such as pipeline thermal expansion or other load and so that the flange of the stress or stress changes over and over again, the pressure, temperature fluctuations in the pipeline or high temperature, high pressure and low temperature pipeline. welding neck flange is not easy to deformation, good sealing, wide application, nominal pressure PN1.0MPa~PN25.0MPa. welding neck flange in accordance with the sealing surface types can be pided into: plane welding neck flange, surface process of welding neck flange, concave convex welding neck flange, tongue and groove surface flange, ring surface welding neck flange connection.

Elbow is used for pipeline turning of a stainless steel pipe fittings, with a 90 degree elbow and 45 degree elbow. elbow production manufacturing process have the hot pushing elbow, stamping elbow, extrusion elbow, butt welding elbow of these methods. First, the hot pushing pipe elbow is seamless elbow manufacturing use a kind of craft, the Elbow push processing machine core mold and a heating device, using sets in the mold of billet in the Elbow push system promote to run in front, in the running of the pipe for heating and expanding diameter and bending forming process. The deformation characteristics of the hot pushing elbow is based on the metal plastic deformation before and after constant volume law to determine the tube diameter, the tube diameter less than the diameter of the elbow, the through mandrel control the blank deformation process, the arc by the compression of the metal flow, compensation for expanding and other parts of the thin, in order to get uniform wall thickness of elbow. The hot pushing elbow forming process has the advantages of beautiful appearance, uniform thickness and continuous operation, suitable for mass production. Therefore, it becomes the main processing method of carbon steel, alloy steel elbow, and is also used in some specifications of stainless steel elbow forming. Second, stamping pipe elbow is first used in mass production, the forming process of seamless elbow, currently in the production of the elbow of the commonly used specifications has been hot pushing pipe method or other forming techniques of alternative, but in some specifications of elbow due to less number of production, wall thickness too thick or too thin, products are special requirements are using stamping manufacturing process. The bending of the elbow is equal to the diameter of the elbow, which is directly pressed and shaped by the press. Before stamping, the tube is placed in the lower mold, the inner core and the end of the tube into the tube blank, the upper mold is pressed down, and the elbow is formed by the external and internal model. Compared with the hot pushing process, forming the appearance quality is inferior to the former, stamping elbow in the forming of outer arc in tension and other parts of excess metal is not the compensation, so outside the arc wall thickness reduction thin about 10%. However, due to the characteristics of single piece production and low cost, it is suitable for the manufacture of small batch and thick wall elbow. Third, Use a dedicated bend forming machine to squeeze the pipe elbow, the pipe into the mold, the push of the push rod, tube blank along the inner mold and the outer mold to complete the clearance movement and the completion of the forming process. The shape of elbow is beautiful, the wall thickness is uniform and the size deviation is small, so the cold extrusion production process is suitable for the manufacture of thin wall stainless steel elbow. Fouth, butt welding pipe elbow production manufacturing process of large diameter elbow butt welding production process is used, the plate in the shape of rolled into the elbow, and then welding, after welding, then to the elbow film in, large diameter elbow. In general, the butt welding elbow, elbow butt welding appearance than other manufacturing processes is beautiful, but other processes of DN800 above the elbow production can not manufacture, the production process of butt welding pipe elbow.