Size Selection
1/2"1/2" NPS (DN 15)
3/4"3/4" NPS (DN 20)
1"1" NPS (DN 25)
1-1/2"1-1/2" NPS (DN 40)
2"2" NPS (DN 50)
Product page
SKYLAND
ASME B16.5 Socket Weld Raised Face Flanges (SWRF)
Skyland Socket Weld Flanges (SWRF) are designed for small-diameter (1/2" to 4" NPS), high-pressure piping where superior joint strength and smooth internal bore alignment are required. The pipe is inserted into the recessed counterbore and welded externally with a single fillet weld, providing excellent fatigue resistance in chemical, steam, and hydraulic lines.
Manufactured to ASME / ANSI B16.5, DIN 2633, and EN 1092-1 standards
Pressure Classes: Class 150, 300, 600, 1500, and 2500 LBS
Sizes: 1/2" to 4" NPS (DN 15 to DN 100)
Recessed socket counterbore with bottom shoulder provides smooth fluid flow transition
Ready for quotationShare your range, connection and case requirement.
Talk to ATHStandardASME / ANSI B16.5, EN 1092-1
Pressure ClassClass 150# to 2500#
Sizes1/2" to 4" NPS (DN 15 to DN 100)
FacingRaised Face (RF) standard / RTJ optional
MaterialsA105N, A350 LF2, A182 F316L, Duplex F51, Alloy 20
CertificationsEN 10204 3.1, PED 2014/68/EU, ISO 9001:2015
Technical Selection
ASME B16.5 Socket Weld Flange Specifications
Select nominal size, class rating, and alloy grade for socket weld flanges.
StandardASME B16.5
Sizes1/2" to 4"
Classes150# - 2500#
Joint TypeSocket Counterbore
Part Number Example
SKL-SW-020-300RF-316L
SKLBrandSkyland Metal & Alloys
SWTypeSocket Weld Flange (SWRF)
020Size2" NPS (DN 50)
300RFClassClass 300 Raised Face
316LMaterialASTM A182 F316L Stainless
Technical specifications
StandardASME B16.5
Installation Rule
ASME B31.3 requires a 1/16" (1.6 mm) expansion gap between pipe end and socket bottom before welding to prevent weld root cracking.
Product Engineering
Socket weld flanges provide smooth internal flow without the flow restrictions of threaded joints or the alignment complexity of weld necks in small bore pipe runs.