ASME B16.5 Weld Neck Raised Face Flanges (WNRF)

Name: ASME B16.5 Weld Neck Raised Face Flanges (WNRF)
Brand: SKYLAND

Skyland Weld Neck Flanges (WNRF) are the premier choice for critical high-pressure and high-temperature industrial pipelines. Featuring a long tapered hub that smoothly transitions stress from the flange ring into the pipe wall, they provide unmatched resistance to bending moments, thermal shock, and line vibrations.

Manufactured to ASME / ANSI B16.5, ASME B16.47 Series A & B, DIN 2631-2638, and EN 1092-1 Type 11

Pressure Classes: Class 150, 300, 400, 600, 900, 1500, and 2500 LBS (PN10 to PN420)

Sizes: 1/2" to 48" NB (DN 15 to DN 1200) with matching pipe bore schedules (Sch 10S to XXS)

Beveled weld end per ASME B16.25 for 100% full-penetration radiographic-quality butt-welding

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ASME B16.5 Weld Neck Raised Face Flanges (WNRF)

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StandardASME / ANSI B16.5, ASME B16.47, EN 1092-1 Type 11, DIN 2633

Pressure ClassClass 150#, 300#, 600#, 900#, 1500#, 2500#

Sizes1/2" to 48" (DN 15 to DN 1200)

Bore SchedulesSch 10S, 40S, STD, 80S, XS, 120, 160, XXS (matching pipe ID)

MaterialsASTM A105N, A350 LF2, A182 F316L, Duplex F51, Inconel 625

CertificationsEN 10204 3.1, PED 2014/68/EU, ISO 9001:2015, NACE

Technical Specifications

ASME B16.5 Weld Neck Flange Matrix

Select nominal size, pressure class, matching pipe schedule, and material grade.

StandardASME B16.5 / B16.47

Classes150# to 2500#

Sizes1/2" to 48"

Joint PrepASME B16.25 Beveled

Pressure Class Selection

150#Class 150 (General Service)

300#Class 300 (Steam & Refining)

600#Class 600 (High Pressure Gas)

900# / 1500# / 2500#Severe High Pressure & Subsea

Part Number Example

SKL-WN-080-600RF-SCH80-316L

SKLBrandSkyland Metal & Alloys

WNTypeWeld Neck Flange (WNRF)

080Size8" NPS (DN 200)

600RFClassClass 600 Raised Face

SCH80ScheduleSchedule 80 Bore

316LMaterialASTM A182 F316L

Technical specifications

Design CodeASME B16.5 / EN 1092-1

Operational Notes

Inside diameter of the weld neck hub must precisely match the pipe inside diameter to avoid flow turbulence.

Engineering Advantage

The tapered hub reinforces the flange against high bending loads caused by pipeline expansion or wave action on offshore platforms.

Buttweld joint can be 100% radiographically examined to guarantee zero defects in critical nuclear, subsea, and refining lines.