05 // Industrial Flanges

Socket Weld Flanges

VEFLOX Socket Weld Flanges are engineered specifically for small-diameter, high-pressure piping systems. Featuring a recessed bore that allows the pipe to be inserted and secured with a single external fillet weld, these flanges provide a smooth internal transition, effectively preventing fluid turbulence and enhancing the fatigue resistance of the connection in high-vibration environments.

Small Bore High-Pressure

Detailed Technical Specifications

Flange Profile

Socket Weld (SW): Features a counterbore (socket) slightly larger than the pipe OD. The pipe is inserted into this socket until it seats against the internal shoulder, ensuring precise alignment.

Dimensional Standards

ASME/ANSI B16.5 (Standard for small bore sizes), EN 1092-1, BS 4504, JIS B2220

Pressure Ratings (Class)

ASME/ANSI: 150#, 300#, 600#, 1500#
DIN/EN: PN16, PN40, PN64, PN100

Material Grades

Carbon Steel: ASTM A105 / A105N, A350 LF2 / LF3
Stainless Steel: ASTM A182 F304/304L, F316/316L, F321, F347
Alloy & High Nickel: ASTM A182 F11, F22, F51 (Duplex), Inconel, Monel, Hastelloy

Facing Types

Raised Face (RF) is standard, with Flat Face (FF) and Ring Type Joint (RTJ) options available for specialized sealing requirements.

Internal Shoulder

Includes a precisely machined internal shoulder that serves as a stop, preventing the pipe from protruding into the flow path, thus eliminating dead-spots and turbulence.

Manufacturing Process

Drop Forged to ensure high fatigue strength, followed by CNC machining of the socket bore to meet strict ASME tolerance standards.

Core Advantages

Smooth Internal Bore

The internal shoulder design creates a uniform pipe-to-flange flow channel, eliminating the internal step-off found in Slip-On flanges, which significantly reduces flow-induced erosion.

Enhanced Fatigue Resistance

The design of the socket weld (fillet weld on the outside) provides excellent fatigue strength in small-bore piping systems subject to mechanical vibration, outperforming standard slip-on alternatives.

Assembly Efficiency

The socket design allows for an easy "fit-and-weld" assembly, eliminating the time-consuming pipe beveling/tapering process required for butt-welded flanges.

Industries Served

Oil & Gas

Petrochemicals

Power Generation

Water Treatment

Shipbuilding

Pharmaceuticals