{"product_id":"weld-neck-flange-4-class-600-raised-face-rf-sch-xh","title":"Weld Neck Flange – 4\" Class 600 Raised Face (RF) | SCH XH","description":"\u003cp data-path-to-node=\"4\"\u003eThe 4\" Class 600 Raised Face (RF) Weld Neck Flange (Schedule XH) is a premium, heavy-duty forged piping component engineered for high-pressure, severe-stress industrial networks. Designed to securely connect pipes, massive valves, and heavy equipment, this Class 600 flange provides a robust, permanent butt-weld connection perfectly suited for demanding oil and gas, petrochemical, and power generation applications.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eUnlike slip-on or threaded flanges, the weld neck flange features a distinct, long tapered hub that gradually transitions to match the wall thickness of the adjoining pipe—in this specific case, \u003cb data-path-to-node=\"5\" data-index-in-node=\"195\"\u003eSchedule XH (Extra Heavy)\u003c\/b\u003e. This elongated hub provides critical structural reinforcement, effectively transferring severe mechanical stress away from the weld joint and distributing it evenly into the pipe body. This design makes the weld neck flange the ultimate, fail-safe choice for pipeline systems subjected to extreme temperature fluctuations, high internal pressures, and cyclic bending or vibration.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThis flange features a \u003cb data-path-to-node=\"6\" data-index-in-node=\"23\"\u003eRaised Face (RF)\u003c\/b\u003e profile. The sealing surface is machined to sit slightly higher than the bolting circle, concentrating the mechanical bolt load onto a localized gasket area. This creates an exceptionally tight, high-integrity seal designed to contain hazardous liquids and high-pressure gases safely. Manufactured from premium forged steel, it is precision-machined to conform strictly to ASME \/ ANSI B16.5 dimensional standards.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eFeatures \u0026amp; Benefits\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eTapered Hub Design:\u003c\/b\u003e The distinctive weld neck hub distributes mechanical stress and pipeline vibration away from the weld joint, preventing localized fatigue and extending system lifespan.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eClass 600 Pressure Rating:\u003c\/b\u003e Engineered to safely handle severe high-pressure environments, making it ideal for critical infrastructure and hazardous fluid transfer lines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eSchedule XH Bore:\u003c\/b\u003e The internal bore is precision-machined to match Schedule XH (Extra Heavy) piping, ensuring a smooth, turbulence-free transition of internal fluids and combating abrasive wear.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eRaised Face (RF) Profile:\u003c\/b\u003e The elevated sealing face concentrates gasket compression, maximizing seal integrity and virtually eliminating the risk of high-pressure blowouts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eASME B16.5 Compliant:\u003c\/b\u003e Machined to strict industry tolerances to guarantee a perfect face-to-face fit with standard mating equipment and heavy-duty piping networks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eSpecifications \u0026amp; Technical Details\u003c\/b\u003e\u003c\/p\u003e\n\u003ctable data-path-to-node=\"10\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,1,0,0\"\u003e\u003cb data-path-to-node=\"10,1,0,0\" data-index-in-node=\"0\"\u003eComponent Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,1,1,0\"\u003eWeld Neck Flange (WN \/ WNRF)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,2,0,0\"\u003e\u003cb data-path-to-node=\"10,2,0,0\" data-index-in-node=\"0\"\u003eSize\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,2,1,0\"\u003e4 Inch (Nominal Pipe Size)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,3,0,0\"\u003e\u003cb data-path-to-node=\"10,3,0,0\" data-index-in-node=\"0\"\u003ePressure Class\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,3,1,0\"\u003eClass 600 (600#)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,4,0,0\"\u003e\u003cb data-path-to-node=\"10,4,0,0\" data-index-in-node=\"0\"\u003eBore Schedule\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,4,1,0\"\u003eSCH XH (Schedule Extra Heavy \/ XS)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,5,0,0\"\u003e\u003cb data-path-to-node=\"10,5,0,0\" data-index-in-node=\"0\"\u003eFace Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,5,1,0\"\u003eRaised Face (RF)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,6,0,0\"\u003e\u003cb data-path-to-node=\"10,6,0,0\" data-index-in-node=\"0\"\u003eMaterial\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,6,1,0\"\u003eHigh-Strength Forged Carbon Steel \/ Alloy Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,7,0,0\"\u003e\u003cb data-path-to-node=\"10,7,0,0\" data-index-in-node=\"0\"\u003eIndustry Standard\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,7,1,0\"\u003eASME \/ ANSI B16.5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,8,0,0\"\u003e\u003cb data-path-to-node=\"10,8,0,0\" data-index-in-node=\"0\"\u003eService Application\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,8,1,0\"\u003eSevere Service (High-pressure gas lines, steam networks, and heavy cyclical stress environments)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eApplications\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eThis 4-inch Class 600 SCH XH weld neck flange is a critical infrastructure component for severe-service industrial facilities. Typical applications include high-pressure pump discharge headers, massive compressor station piping, extreme-temperature refinery lines, heavy-duty steam networks, and rigorous oilfield fluid routing where structural integrity is paramount.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eQuality Assurance\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003eAll our industrial flanges are manufactured from premium forged steel and subjected to strict quality control processes. Each weld neck flange undergoes rigorous dimensional inspection, precision bore and face machining verification, and thorough non-destructive testing (NDT) to ensure absolute structural integrity and defect-free sealing surfaces. Full material test reports (MTRs) are available upon request to guarantee full compliance with ASME and ANSI industry standards.\u003c\/p\u003e\n\u003cp data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eRequest a Quote\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"16\"\u003e📞 +1 405 666 5011Forged Steel Flange\u003c\/p\u003e\n\u003cp data-path-to-node=\"16\"\u003e📧 seo@blazess.com\u003c\/p\u003e","brand":"Blaze Sales \u0026 Service","offers":[{"title":"Default Title","offer_id":48244210270453,"sku":"FL-4600WNX","price":395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/5785\/1637\/files\/WeldNeckFlange_4Class600RaisedFace_RF_SCHXH.png?v=1780963593","url":"https:\/\/blazess.com\/ar\/products\/weld-neck-flange-4-class-600-raised-face-rf-sch-xh","provider":"Blaze Sales \u0026 Service","version":"1.0","type":"link"}