ASME B16.5 Socket Weld Flange Manufacturer for High Pressure Piping

  Product Overview

Socket Weld Flange is a forged pipe flange designed for small bore high pressure piping systems. It features a recessed counterbore where the pipe is inserted before welding. This design ensures strong mechanical connection and excellent sealing reliability.

Socket weld flanges are widely used in chemical processing units, oil and gas pipelines, hydraulic systems and steam service lines where vibration resistance and leak prevention are critical.

Compared with slip on flanges, socket weld flanges provide better structural strength and are preferred for high pressure installations.

  Socket Weld Flange Manufacturing Process

• Raw Material Ultrasonic Testing
• Closed Die Forging
• Heat Treatment
• CNC Turning & Facing
• Bolt Hole Drilling
• Dimensional Inspection
• NDT Testing (UT / RT / PMI / Hardness)
• Surface Protection & Export Packing

Precision forging ensures uniform grain flow and improved pressure resistance.

  Socket Weld Flange Welding Instruction (Engineering Guide)

Proper welding practice is essential for safe installation.

Recommended Procedure:

• Insert pipe into flange socket leaving expansion gap (approx. 1.6 mm)
• Perform fillet welding around hub
• Maintain correct weld throat thickness
• Avoid excessive heat input
• Conduct visual inspection and NDT if required

This installation method minimizes leakage risk and improves fatigue resistance.

  ASME B16.5 Socket Weld Flange Dimension Table (Example Class 300)

Full dimension charts for Class 150 / 600 / 900 available upon request.

  Socket Weld vs Slip On vs Welding Neck Flange

Socket weld flanges are ideal for high pressure small diameter piping systems.

  Standards & Pressure Ratings

Manufactured according to:

• ASME B16.5
• EN 1092-1
• DIN
• BS
• MSS
• AWWA

Pressure Class:

• Class 150
• Class 300
• Class 600
• Class 900
• Class 1500

Size Range:

• NPS 1/2” – 24”

  Materials Available

Carbon Steel

ASTM A105
A350 LF2
A694 F52 / F60

Stainless Steel

F304 / 304L
F316 / 316L
F321
F904L

Alloy Steel

F11
F22
F91

Duplex Steel

S31803
S32205
S32750

Nickel Alloy

Inconel 625
Inconel 825
Monel 400

  Surface Treatment

• Anti-rust Oil
• Black Painting
• Galvanizing
• Epoxy Coating

  Industrial Applications

• Oil & Gas High Pressure Pipelines
• Chemical Processing Units
• Steam Service Lines
• Hydraulic Systems
• Offshore Engineering
• Power Generation Plants

  Packing & Export

• Plywood Case Packing
• Steel Pallet Packing
• Waterproof Protection
• Heat Number Traceability
• EN10204 3.1 / 3.2 Certificate

  Project Supply Experience

Socket weld flanges supplied for:

• Refinery Revamp Project
• LNG Terminal Maintenance
• Offshore Platform Upgrade
• Industrial Boiler Pipeline System

(Custom project references available.)

  FAQ

Why use socket weld flange instead of slip on flange?
Socket weld flanges provide higher strength and better sealing for high pressure systems.

What pipe size is suitable for socket weld flange?
Typically recommended for small bore pipelines.

Is gap required before welding?
Yes, small expansion gap is recommended to avoid thermal stress.