Socket Weld Flange (SW Flange)

1️⃣ Product Introduction

VikTech Fittings is a trusted manufacturer, exporter, and supplier of premium-quality Socket Weld Flanges (SW Flanges) manufactured in accordance with ASME standards including ASME B16.5, ASME B16.47, EN, and DIN specifications.

Socket Weld Flanges are designed with a recessed socket in which the pipe is inserted before being fillet welded. This design ensures proper pipe alignment and provides strong, leak-resistant connections in small-diameter, high-pressure piping systems.

SW flanges are primarily used in high-pressure applications involving small bore piping where smooth internal flow and structural strength are critical.

2️⃣ Technical Specifications

Product Name                      Socket Weld Flange (SW Flange)

Standards                            ASME B16.5, EN 1092-1, DIN

Size                                     Range½″ (DN15) to 4″ (DN100)

Pressure Class                   Class 150, 300, 600, 900, 1500, 2500

Facing Types                      RF, FF, RTJ

Manufacturing                     Forged

Connection Type                 Socket Insertion + Fillet Weld

Certification                         EN 10204 3.1 / 3.2, IBR, PED (On Request)

3️⃣ Available Material Grades

▶ Carbon Steel (CS)

• ASTM A105

• ASTM A350 LF2

• ASTM A694 F42 / F52

▶ Stainless Steel (SS)

• ASTM A182 F304 / 304L

• F316 / 316L

• F321

• F347

▶ Alloy Steel

• ASTM A182 F11

• F22

• F91

▶ Duplex & Super Duplex

• F51 (UNS S31803)

• F60 (UNS S32205)

▶ Nickel Alloys (On Request)

• Inconel 625

• Monel 400

• Hastelloy C276

4️⃣ Size & Pressure Range

• Size: ½″ to 4″

• Pressure Ratings: Class 150 to 2500

• Suitable for high-pressure, small bore systems

• Custom bore available

Socket Weld Flanges are most commonly used in Class 300 and above pressure ratings.

5️⃣ Standards & Compliance

• ASME B16.5

• EN 1092-1

• DIN Standards

• ISO Certified Manufacturing

• IBR Approved (On Request)

• PED Compliance (Europe Projects)

6️⃣ Design & Features

• Recessed socket for pipe insertion

• 1.6 mm expansion gap provision (as per standard practice)

• Strong fillet weld connection

• Smooth internal bore (no weld bead intrusion)

• Ideal for high-pressure service

• Compact and reliable design

Dimensional tolerances strictly maintained as per ASME standards.

7️⃣ Manufacturing & Heat Treatment

• Closed die forging

• CNC machining

• Socket boring & facing

• Drilling & serration

• Heat treatment (if required)

• Final inspection & marking

8️⃣ Pressure & Temperature Ratings

MaterialTemperature RangePressure ClassCarbon SteelUp to 425°CClass 150 – 2500Stainless SteelUp to 870°CClass 150 – 2500Alloy SteelUp to 590°CClass 300 – 2500DuplexUp to 300°CHigh pressure service

(Refer ASME pressure-temperature chart for exact rating.)

9️⃣ Testing & Quality Control

✔ Visual & Dimensional Inspection
✔ PMI Testing
✔ Ultrasonic Testing
✔ Hardness & Tensile Testing
✔ Impact Testing (Low Temp Grades)
✔ Third Party Inspection – TUV / BV / SGS
✔ EN 10204 3.1 Certification
✔ Heat Number Traceability

🔟 Applications & Industries

• High Pressure Steam Lines

• Oil & Gas Industry

• Petrochemical Plants

• Hydraulic Systems

• Chemical Processing Units

• Small Bore Instrumentation Lines

• Offshore Platforms

Socket Weld Flanges are especially suitable for small-diameter, high-pressure piping systems where leak-proof performance is critical.

1️⃣1️⃣ Surface Finish Options

• Anti-Rust Oil

• Black Paint

• Hot Dip Galvanized

• FBE Coating

• Epoxy Coating

• Zinc Coated

1️⃣2️⃣ Packing & Marking

• Wooden crates / pallets

• Bubble wrapping

• Plastic face protectors

• Marking: Size, Grade, Class, Heat No., Standard

• Custom project marking

• Seaworthy export packing

1️⃣3️⃣ Why Choose VikTech Fittings?

• Premium forged quality

• Accurate socket machining

• High pressure capability

• Fast delivery for urgent shutdown jobs

• Competitive factory pricing

• Export-ready documentation

• Reliable supply chain

1️⃣4️⃣ SEO Keywords

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