ANSI / ASME B16.5 High-Pressure Forged Steel Flanges

Name: ANSI / ASME B16.5 High-Pressure Forged Steel Flanges
Brand: SKYLAND

Skyland High-Pressure Forged Steel Flanges are hot forged from high-density solid billets to refine metallurgical grain structure and eliminate internal voids. Compliant with ANSI / ASME B16.5, they provide superior tensile strength and impact toughness for deepwater exploration, high-temperature steam generation, and severe chemical refining.

Manufactured to ANSI / ASME B16.5, ASME B16.47, and international forging standards

Pressure Classes: Class 150, 300, 600, 900, 1500, and 2500 LBS (PN20 to PN420)

Sizes: 1/2" to 48" NB (DN 15 to DN 1200)

Material grades: ASTM A105N, A350 LF2, A182 F304L/F316L/F321/F347, F51 Duplex, F53 Super Duplex, F11, F22, F91, Incoloy 825, Hastelloy C276

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ANSI / ASME B16.5 High-Pressure Forged Steel Flanges

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StandardANSI / ASME B16.5, ASME B16.47

Pressure ClassClass 150# to 2500# (PN20 - PN420)

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

Forging ProcessClosed-die & open-die hot forging + CNC machining

MaterialsA105N, A350 LF2, A182 F316L, Duplex F51, F91, Inconel

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

Forging Excellence

ANSI B16.5 Forged Flange Specifications

Select nominal size, class rating, and alloy grade for forged flanges.

StandardANSI / ASME B16.5

Classes150# to 2500#

Sizes1/2" to 48"

Process100% Forged Billet

Pressure Class

150# - 300#Medium Pressure (20 - 50 bar)

600# - 900#High Pressure (100 - 150 bar)

1500# - 2500#Ultra High Pressure (250 - 420 bar)

Part Number Example

SKL-FF-040-900RF-A105N

SKLBrandSkyland Metal & Alloys

FFTypeForged Flange

040Size4" NPS (DN 100)

900RFClassClass 900 Raised Face

A105NMaterialASTM A105 Normalized Carbon Steel

Technical specifications

Design CodeANSI B16.5

Operational Notes

Recommended for high cyclic pressure, critical steam headers, and deepwater manifolds.

Forging Quality & Integrity

Hot forging aligns the metal's grain structure with the shape of the flange, maximizing yield strength and fatigue endurance compared to plate cut or cast flanges.