A long weld neck flange LWN flange is a type of flange that has a long tapered neck that extends from the flange face to the pipe This longer neck provides more support to the pipe at the weld joint making it a more robust and reliable connection LWN flanges are typically used in highpressure and hightemperature applications such as in the oil and gas industry Technical Specifications Dimensions 12 to 24 in diameter The neck length is typically 15 to 2 times the flange diameter Materials Carbon Steel Stainless Steel or Alloy Steel Pressure ratings 150 psi to 2500 psi Temperature ratings 200F to 1000F Types RFFFRTJ LWN flanges are used in a variety of applications including Oil and gas industry Chemical industry Power generation Water treatment HVAC The benefits of using LWN flanges include Increased strength and reliability Longer service life Wider range of applications Easier to assemble and disassemble
A weld neck flange is a type of flange that is joined to a piping system by butt welding. The flange consists of a circular fitting with a protruding rim around the circumference. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts. The flange also has a long tapered hub that gradually meets the wall thickness of the pipe or fitting. Technical Specifications: Materials: Carbon steel, stainless steel, duplex steel, alloy steel, etc. Dimensions: 1/2" to 24" Class range: Class 150 to 2500 (ANSI/ASME B16.5) Type: RF,FF,RJT PN range: PN 2.5 to PN 250 Hub length: Short hub (SH), Long hub (LH), Extra long hub (XH) Finish: Black, mill finish, painted, etc. Advantages of Weld Neck Flanges: Increased strength and durability Reduced stress concentration Smooth transition from flange thickness to pipe or fitting wall thickness Easy to radiograph for flaw detection Can be used in high pressure and high temperature applications Applications: Power plants Chemical plants Oil and gas industries Water treatment plants HVAC systems Other industrial applications
Welding Neck flange SIZE DIAMETER 15mm NB to 1200mm NB as per ANSI B 16.5 Pressure rating form 150 Lbs to 2500 Lbs Size Larger Than 600NB AS PER API 605 or M.S.SP 44 up to 1200mm NB GRADE AVAILABLE. Carbon Steel ASTM A105 A105N A694 F42 46 52 56 60 65 70 A350 LF3 A350 LF2, etc. Alloy Steel ASTM A182 F1 F5 F9 F11 F22 F91 etc.
Stainless Steel Orifice Flanges ASTM A182 Stainless Steel Orifice Flange Stainless Steel Orifice Plate Flanges
Customized bends, butt weld fittings, forged fittings, flanges, fabricated pipes, outlets (branch connections), fasteners, specialize in 904l pipes & fittings & aisi 4130 (fittings & flanges) , titanium grade 2 tubes , aluminium(industrial raw materials), pipes , tubes, bars, sheets & plates.
API 6A Weld Neck Flanges are pipe flanges attach by welding the pipes to the neck of the flanges. This transfers stress from the flange to the pipe instead. It also reduces the stress concentration from the base of the hub. Welding neck flanges remove stress concentration and allow full working pressure and they are often used for high pressure applications. The inside diameter of the flange is designed to match the pipe's inside diameter. Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ facing.
roductASME 165 threaded flanges BrandRenaissance Pipe Fitting Inc SizesRefer the specification ConditionNew Rating46 based on 34 reviews priceStart from 20 USD RFP India is an expert manufacturer of high quality of threaded flanges They are at length used in piping systems by means of having low pressure since no welding is fretful during connecting these flanges to the pipes or other devices Threaded Flanges undoubtedly put a ceiling on its function to moderately low pressure piping systems In a nutshell these Flanges are being used to connect other threaded parts in noncritical and low pressure applications Meanwhile these flanges can be joined to the pipe without any welding and is appropriate in exceptionally quicktempered areas where welding is treacherous nbsp RANGE 15 NB to 60 1500NB in 150 LBS 300 LBS 600 LBS 900 LBS 1500 LBS 2500 LBS ASA 150 ASA 300 PN 6101625 4064100160 ETC available with NACE MR 0175 SIZE 15NB to 60 1500NB CLASS PRESSURE Class Pressure 150 300 600 900 1500 2500 PN6 PN10 PN16 PN25 PN40 PN64 DIMENSION B165 BS4504 EN1092 B1636 B1647 B1648 MSS SP44 STD STD ANSI Flanges ASME Flanges DIN Flanges EN Flanges BS Flanges API JIS NACE etc FEATURES Dimensional accuracy Corrosion resistance High efficiency Excellent finish Durable Stainless Steel Threaded Flanges Standard ASTM ASME ASA 182 Grade F 304 304L 304H 309S 309H 310S 310H 316 316TI 316H 316L 316LN 317 317L 321 321H 347 347H 904L Duplex Steel Threaded Flanges Standard ASTM ASME ASA 182 Grade F 44 F 45 F51 F 53 F 55 F 60 F 61 Aluminium Threaded Flanges Standard ASTM B247 B361 Grade 2024 6061 6063 6101 7075 Titanium Threaded Flanges Standard ASTM B381 Grade Grade 1 Grade 2 Grade 4 Grade 5 Grade 6 Grade 7 Grade 9 Grade 19 Grade 23 Carbon Steel Threaded Flanges Standard ASTM A 105A694 A350 LF3A350 LF2 Grade F42465256606570 Low Temperature Carbon Steel Threaded Flanges Standard ASTM A 350 LF2 A350 LF3 Alloy Steel Threaded Flanges Standard ASTM A182 Grade F1F5F9F11F22F91 Copper Alloy Threaded Flanges Standard ASTM ASME SB 61 62 151 152 Grade UNS NO C 70600 CU NI 9010 C 71500 CU NI 7030 C 71640 Nickel Alloy Threaded Flanges Standard ASTM ASME SB 564 160 472 Nickel 200 UNS N02200   Nickel 201 UNS N02201   Monel 400 UNS N04400 Monel K500 UNS N05500   Inconel K600 UNS N06600   Inconel 601 UNS N06601 Inconel 625 UNS N06625   Inconel 800 UNS N08800   Inconel 800H UNS N08810 Inconel 825 UNS N08825   Hastelloy C276 UNS N10276   Alloy 20 UNS N08020 Test Certificate Manufacturer Test Certificate as per EN 10204 31 nbsp Types Of Threaded Flanges SS 310 310S Threaded Flanges Duplex Steel UNS S31803 Threaded Flanges Stainless Steel 304 304L Threaded Flanges Duplex Steel Threaded Flanges Stainless Steel 316 316L Threaded Flanges Duplex Steel UNS S32205 Threaded Flanges Stailess Steel 321 321H Threaded Flanges Super Duplex UNS S32750 Threaded Flanges
Product: Flanges Brand: Renaissance Pipe Fitting Inc. Sizes: Refer to the specification Condition: New Rating:4.6, based on 12 reviews price: Start fro 10 USD SME - A 182 / 240, SA 182 / 240 Flanges, Aluminium Flanges, Carbon Steel Flanges, Nickel Alloy Flanges, supplier. RFP India is a renowned manufacturer and supplier of flanges in the steel market internationally. A flange is a cast ring or a forged which is intended to design and join a range of pipe sections or predominantly to any other tools that call for a linking point in the middle. We also offer a couple of fundamental kinds of flanges that have an enormous requirement such as Stainless Steel Flanges, Carbon Steel Flanges, and Alloy Steel flanges. Meanwhile, as the name implies, Flanges are manufactured from high-quality stainless steel, a material that is commonly used for making such types of flanges. We provide one of the widest ranges of standardized and customized flanges for to meet the dissimilar needs of the clients.
We present the best quality Stainless Steel Flanges in the national as well as international markets. Stainless Steel Flanges offered by us are accessible in various ranges and specifications as per the requirement of the clients. Flange Types: 1:Slip-On Flanges 2:Threaded Flanges 3:Weld Neck Flanges 4:Blind Flanges 5:Socket Weld Flanges 6:Lap Joint Flanges Grades Austenitic Steel: 301, 304, 304H, 304L, 310, 310S, 316, 316L, 317, 317L, 321, 347 Ferritic Steel: 409, 409M, 410s, 420, 430 Martensitic Steel: 410, 416, 420, 431
ProductASME 165 blind flanges BrandRenaissance Pipe Fitting Inc SizesRefer the specification ConditionNew Rating43 based on 3 reviews priceStart from 20 USD RFP India is a manufacturer to offer high quality of industrial blind flanges in India More often than not consigned as blanking flanges these types of flanges are widely used in high pressure usages Blind flanges are generally used to seal the last part of a piping system for to discontinue the flowage of liquids or gases The purpose of blind flanges allows an ease of right to use within a piping system once it has been blocked RFP India proposes blind plate flanges that are being manufactured at our best services to the companies in different industries RANGE 15 NB to 60 1500NB in 150 LBS 300 LBS 600 LBS 900 LBS 1500 LBS 2500 LBS ASA 150 ASA 300 PN 6101625 4064100160 ETC available with NACE MR 0175 SIZE 15NB to 60 1500NB CLASS PRESSURE Class Pressure 150 300 600 900 1500 2500 PN6 PN10 PN16 PN25 PN40 PN64 DIMENSION B165 BS4504 EN1092 B1636 B1647 B1648 MSS SP44 STD STD ANSI Flanges ASME Flanges DIN Flanges EN Flanges BS Flanges API JIS NACE etc FEATURES Dimensional accuracy Corrosion resistance High efficiency Excellent finish Durable Stainless Steel Blind Flanges Standard ASTM ASME ASA 182 Grade F 304 304L 304H 309S 309H 310S 310H 316 316TI 316H 316L 316LN 317 317L 321 321H 347 347H 904L Duplex Steel Blind Flanges Standard ASTM ASME ASA 182 Grade F 44 F 45 F51 F 53 F 55 F 60 F 61 Aluminium Blind Flanges Standard ASTM B247 B361 Grade 2024 6061 6063 6101 7075 Titanium Blind Flanges Standard ASTM B381 Grade Grade 1 Grade 2 Grade 4 Grade 5 Grade 6 Grade 7 Grade 9 Grade 19 Grade 23 Carbon Steel Blind Flanges Standard ASTM A 105A694 A350 LF3A350 LF2 Grade F42465256606570 Low Temperature Carbon Steel Blind Flanges Standard ASTM A 350 LF2 A350 LF3 Alloy Steel Blind Flanges Standard ASTM A182 Grade F1F5F9F11F22F91 Copper Alloy Blind Flanges Standard ASTM ASME SB 61 62 151 152 Grade UNS NO C 70600 CU NI 9010 C 71500 CU NI 7030 C 71640 Nickel Alloy Blind Flanges Standard ASTM ASME SB 564 160 472 Nickel 200 UNS N02200   Nickel 201 UNS N02201   Monel 400 UNS N04400 Monel K500 UNS N05500   Inconel K600 UNS N06600   Inconel 601 UNS N06601 Inconel 625 UNS N06625   Inconel 800 UNS N08800   Inconel 800H UNS N08810 Inconel 825 UNS N08825   Hastelloy C276 UNS N10276   Alloy 20 UNS N08020 Test Certificate Manufacturer Test Certificate as per EN 10204 31 nbsp Types Of Blind Flanges SS 310 310S Blind Flanges Duplex Steel UNS S31803 Blind Flanges Stainless Steel 304 304L Blind Flanges Duplex Steel Blind Flanges Stainless Steel 316 316L Blind Flanges Duplex Steel UNS S32205 Blind Flanges Stailess Steel 321 321H Blind Flanges Super Duplex UNS S32750 Blind Flanges Monel 400 Blind Flanges Hastelloy C276 Blind Flanges SS Blind Flanges Steel Blind Flanges Inconel
Ritlok-flanges
ProductASME 165 slip on flanges BrandRenaissance Pipe Fitting Inc SizesRefer the specification ConditionNew Rating44 based on 22 reviews priceStart from 20 USD RFP India is specific in making high quality of Slipon flanges These types of flanges more often than not slip over the pipe Slip on pipe flanges are by and large manufactured by means of within diameter of the pipe flange which is higher than the external diameter of the pipe in some measure Well this allows the Slip on flange to in fact slip over the pipe Slipon pipe flanges are being connected usually towards both inside and outside to provide strength and also to stop the leakage At times they also have a ringboss or a focal point and can be manufactured with a bore for to go quite well with either pipe or tube nbsp RANGE 15 NB to 60 1500NB in 150 LBS 300 LBS 600 LBS 900 LBS 1500 LBS 2500 LBS ASA 150 ASA 300 PN 6101625 4064100160 ETC available with NACE MR 0175 SIZE 15NB to 60 1500NB CLASS PRESSURE Class Pressure 150 300 600 900 1500 2500 PN6 PN10 PN16 PN25 PN40 PN64 DIMENSION B165 BS4504 EN1092 B1636 B1647 B1648 MSS SP44 STD STD ANSI Flanges ASME Flanges DIN Flanges EN Flanges BS Flanges API JIS NACE etc FEATURES Dimensional accuracy Corrosion resistance High efficiency Excellent finish Durable Stainless Steel Slip on Flanges Standard ASTM ASME ASA 182 Grade F 304 304L 304H 309S 309H 310S 310H 316 316TI 316H 316L 316LN 317 317L 321 321H 347 347H 904L Duplex Steel Slip on Flanges Standard ASTM ASME ASA 182 Grade F 44 F 45 F51 F 53 F 55 F 60 F 61 Aluminium Slip on Flanges Standard ASTM B247 B361 Grade 2024 6061 6063 6101 7075 Titanium Slip on Flanges Standard ASTM B381 Grade Grade 1 Grade 2 Grade 4 Grade 5 Grade 6 Grade 7 Grade 9 Grade 19 Grade 23 Carbon Steel Slip on Flanges Standard ASTM A 105A694 A350 LF3A350 LF2 Grade F42465256606570 Low Temperature Carbon Steel Slip on Flanges Standard ASTM A 350 LF2 A350 LF3 Alloy Steel Slip on Flanges Standard ASTM A182 Grade F1F5F9F11F22F91 Copper Alloy Slip on Flanges Standard ASTM ASME SB 61 62 151 152 Grade UNS NO C 70600 CU NI 9010 C 71500 CU NI 7030 C 71640 Nickel Alloy Slip on Flanges Standard ASTM ASME SB 564 160 472 Nickel 200 UNS N02200   Nickel 201 UNS N02201   Monel 400 UNS N04400 Monel K500 UNS N05500   Inconel K600 UNS N06600   Inconel 601 UNS N06601 Inconel 625 UNS N06625   Inconel 800 UNS N08800   Inconel 800H UNS N08810 Inconel 825 UNS N08825   Hastelloy C276 UNS N10276   Alloy 20 UNS N08020 Test Certificate Manufacturer Test Certificate as per EN 10204 31 nbsp Types Of Slip on Flanges SS 310 310S Slip on Flanges Duplex Steel UNS S31803 Slip on Flanges Stainless Steel 304 304L Slip on Flanges Duplex Steel Slip on Flanges Stainless Steel 316 316L Slip on Flanges Duplex Steel UNS S32205 Slip on Flanges Stailess Steel 321 321H Slip on Flanges Super Duplex UNS S32750 Slip on Flanges Mon
ProductASME 165 plate flanges BrandRenaissance Pipe Fitting Inc SizesRefer the specification ConditionNew Rating47 based on 52 reviews priceStart from 20 USD RFP India is a wellknown manufacturer and supplier of Plate Flanges in the steel market industry worldwide Plate flanges are most commonly used in fuel and water pipelines where two flange plates are locked up together with a gasket in the central point of them The flange plate will now have bolt holes all in the region of outer limits and will be used to make joints tees and junctions Meanwhile there are several benefits of Plate Flanges such as it is free from any shortcomings has an unmitigated service life has finer grain establishment as measured up to forged or cast items reduction of the customary maintenance expenditures and so on RANGE 15 NB to 60 1500NB in 150 LBS 300 LBS 600 LBS 900 LBS 1500 LBS 2500 LBS ASA 150 ASA 300 PN 6101625 4064100160 ETC available with NACE MR 0175 SIZE 15NB to 60 1500NB CLASS PRESSURE Class Pressure 150 300 600 900 1500 2500 PN6 PN10 PN16 PN25 PN40 PN64 DIMENSION B165 BS4504 EN1092 B1636 B1647 B1648 MSS SP44 STD STD ANSI Flanges ASME Flanges DIN Flanges EN Flanges BS Flanges API JIS NACE etc FEATURES Dimensional accuracy Corrosion resistance High efficiency Excellent finish Durable Stainless Steel Plate Flanges Standard ASTM ASME ASA 182 Grade F 304 304L 304H 309S 309H 310S 310H 316 316TI 316H 316L 316LN 317 317L 321 321H 347 347H 904L Duplex Steel Plate Flanges Standard ASTM ASME ASA 182 Grade F 44 F 45 F51 F 53 F 55 F 60 F 61 Aluminium Plate Flanges Standard ASTM B247 B361 Grade 2024 6061 6063 6101 7075 Titanium Plate Flanges Standard ASTM B381 Grade Grade 1 Grade 2 Grade 4 Grade 5 Grade 6 Grade 7 Grade 9 Grade 19 Grade 23 Carbon Steel Plate Flanges Standard ASTM A 105A694 A350 LF3A350 LF2 Grade F42465256606570 Low Temperature Carbon Steel Plate Flanges Standard ASTM A 350 LF2 A350 LF3 Alloy Steel Plate Flanges Standard ASTM A182 Grade F1F5F9F11F22F91 Copper Alloy Plate Flanges Standard ASTM ASME SB 61 62 151 152 Grade UNS NO C 70600 CU NI 9010 C 71500 CU NI 7030 C 71640 Nickel Alloy Plate Flanges Standard ASTM ASME SB 564 160 472 Nickel 200 UNS N02200   Nickel 201 UNS N02201   Monel 400 UNS N04400 Monel K500 UNS N05500   Inconel K600 UNS N06600   Inconel 601 UNS N06601 Inconel 625 UNS N06625   Inconel 800 UNS N08800   Inconel 800H UNS N08810 Inconel 825 UNS N08825   Hastelloy C276 UNS N10276   Alloy 20 UNS N08020 Test Certificate Manufacturer Test Certificate as per EN 10204 31 nbsp Types Of Plate Flanges SS 310 310S Plate Flanges Duplex Steel UNS S31803 Plate Flanges Stainless Steel 304 304L Plate Flanges Duplex Steel Plate Flanges Stainless Steel 316 316L Plate Flanges Duplex Steel UNS S32205 Plate Flanges Stailess Steel 321 321H Plate Flanges Super Duplex UNS S32750 Plate Flanges Monel 400 Plate F
ProductASME 165 lapjoint flanges BrandRenaissance Pipe Fitting Inc SizesRefer the specification ConditionNew Rating42 based on 26 reviews priceStart from 20 USD RFP India is a determined manufacturer of high quality of industrial lap joint flanges in India It is very much similar to slipon flange where it is having a radius at the junction of the bore and flange face that is for to create a lap stub end In the meantime the look on the stub end forms out by means of the gasket face on the flange Lap Joint flanges are being used in applications where parts of the piping systems need to be taking away from each other quickly and easily for inspection and replacement These lap joint flanges are being provided in fullscale range and are extensively used at all the pressures RANGE 15 NB to 60 1500NB in 150 LBS 300 LBS 600 LBS 900 LBS 1500 LBS 2500 LBS ASA 150 ASA 300 PN 6101625 4064100160 ETC available with NACE MR 0175 SIZE 15NB to 60 1500NB CLASS PRESSURE Class Pressure 150 300 600 900 1500 2500 PN6 PN10 PN16 PN25 PN40 PN64 DIMENSION B165 BS4504 EN1092 B1636 B1647 B1648 MSS SP44 STD STD ANSI Flanges ASME Flanges DIN Flanges EN Flanges BS Flanges API JIS NACE etc FEATURES Dimensional accuracy Corrosion resistance High efficiency Excellent finish Durable Stainless Steel Lap Joint Flanges Standard ASTM ASME ASA 182 Grade F 304 304L 304H 309S 309H 310S 310H 316 316TI 316H 316L 316LN 317 317L 321 321H 347 347H 904L Duplex Steel Lap Joint Flanges Standard ASTM ASME ASA 182 Grade F 44 F 45 F51 F 53 F 55 F 60 F 61 Aluminium Lap Joint Flanges Standard ASTM B247 B361 Grade 2024 6061 6063 6101 7075 Titanium Lap Joint Flanges Standard ASTM B381 Grade Grade 1 Grade 2 Grade 4 Grade 5 Grade 6 Grade 7 Grade 9 Grade 19 Grade 23 Carbon Steel Lap Joint Flanges Standard ASTM A 105A694 A350 LF3A350 LF2 Grade F42465256606570 Low Temperature Carbon Steel Lap Joint Flanges Standard ASTM A 350 LF2 A350 LF3 Alloy Steel Lap Joint Flanges Standard ASTM A182 Grade F1F5F9F11F22F91 Copper Alloy Lap Joint Flanges Standard ASTM ASME SB 61 62 151 152 Grade UNS NO C 70600 CU NI 9010 C 71500 CU NI 7030 C 71640 Nickel Alloy Lap Joint Flanges Standard ASTM ASME SB 564 160 472 Nickel 200 UNS N02200   Nickel 201 UNS N02201   Monel 400 UNS N04400 Monel K500 UNS N05500   Inconel K600 UNS N06600   Inconel 601 UNS N06601 Inconel 625 UNS N06625   Inconel 800 UNS N08800   Inconel 800H UNS N08810 Inconel 825 UNS N08825   Hastelloy C276 UNS N10276   Alloy 20 UNS N08020 Test Certificate Manufacturer Test Certificate as per EN 10204 31 nbsp Types Of Lap Joint Flanges SS 310 310S Lap Joint Flanges Duplex Steel UNS S31803 Lap Joint Flanges Stainless Steel 304 304L Lap Joint Flanges Duplex Steel Lap Joint Flanges Stainless Steel 316 316L Lap Joint Flanges Duplex Steel UNS S32205 Lap Joint Flanges Stailess Steel 321 321H Lap Joint Flanges Super Duplex UNS S327
Size: 1/2"-72" Type: Welding neck flange Standard: asme b16.5 asm e b16.47 mss sp-44 en 1092 Material:stainless steel, carbon steel, alloy steel Qualification:Iso9001 api ce Packing:Wooden case&pallets Application: petroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etc Testing:Direct reading spectrometer, hydrostatic test, x-ray flaw detector, ultrasonic flaw detector, magentic particle inspection, etc Special design available as the requirement of customer Wooden case&pallets
Material: SS304, SS316. Standard: ANSI, DIN, UNI, EN, JIS, GB, ETC Type:slip on, plate, blind, threaded, welding neck, and other special mode. In wodden case.
high pressure flange,butt welding neck flange 1) Specification: DN15-DN2000 2) Size: 1/2 - 36" 3) Standard: ASME, ANSI, JIS, BS, and DIN 4) Material: stainless steel such as 304/304L/316/316L/316Ti/321; 1.4301/1.4307/1.4401/1.4404/1.4541/1.4571 super duplex stainless steel such as ASTM A182 F51/F53 5) Can produce according to customers' demands
Welding Neck (WN) FlangeThe Welding Neck (WN) Flange is a flange designed to be welded to a pipe. The flange has a long tapered hub that is welded to the pipe to form a strong, leak-free connection. The flange also has a flat circular plate with bolt holes to secure the flange to another flange or piece of equipment. Description A Welding Neck (WN) Flange is a type of flange used in piping systems to connect pipes and equipment together. It is designed to be welded to the pipe or fitting and then bolted to another flange or piece of equipment. The WN flange has a long tapered neck that is welded to the pipe or fitting, and a flat face that extends out from the neck. The flat face of the flange provides a surface for the gasket to seal against, and the bolts are tightened to compress the gasket and create a leak-tight seal. The neck of the WN flange also provides reinforcement to the connection, which makes it suitable for use in high-pressure and high-temperature applications. The tapered design of the neck reduces stress concentrations and distributes the load evenly across the flange, which helps to prevent leaks and failures.
Code No. JSI -68
Long-necked flanges, also known as LWN flanges, are similar to the standard weld neck flanges but the neck is considerably longer. This type of flange is often used as a nozzle for a barrel or a column. They can be classified later as standard type, heavy gun type, variable body type and whole body type. These flanges are kind of exclusive for the reason of their uncomplicated connectivity with other pipes. Where standard weld neck flanges are used extensively for pipes, long weld neck flanges (often abbreviated to LWN) are used in high pressure and high (or fluctuating) temperature situations primarily in the oil and gas industry. The long neck guides the pipe into the flange itself and provides reinforcement that a standard weld neck flange cannot. This reinforcement is very important for safety in high pressure industrial, commercial and even residential systems. Uses of long-necked flanges are primarily on vessels where an elongated neck is required. Long-necked flanges (LWN) are primarily utilised on vessels where an elongated neck is required. This is considered a specialty flange because of the protruding neck or hub, which acts as a boring extension. The conical collar helps reduce the thickness of the steel and appears to be a pipe extension. LWN steel flanges are used primarily in the chemical and petroleum industries, as well as in commercial and residential buildings ASME 16.47 anf asme 16.5 series of long weld flanges are used exclusively for situations in high levels of stress and fluctuating temperatures.
