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3 1/2 Inch Slip On Flange

3 1/2 Inch Slip On Flange – Technical Specifications

Parameter Specification
Product Name 3 1/2 Inch Slip On Flange
Nominal Size 3 1/2 Inch (DN90 / 90 mm)
Type Slip On (SO) Flange
Standard ASME B16.5, ASTM A105, ASTM A182
Pressure Class Class 150, 300, 600, 900, 1500, 2500
Material Grades Carbon Steel: ASTM A105, A350 LF2
Stainless Steel: ASTM A182 F304, F304L, F316, F316L
Alloy Steel: ASTM A182 F11, F22, F91
Duplex Steel: ASTM A182 F51, F60
Super Duplex Steel: ASTM A182 F53, F55
Facing Type Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Connection Type Slip On (Fillet Weld – Internal & External)
Manufacturing Forged & CNC Machined
Surface Finish Anti-rust Oil, Black Paint, Galvanized
Inspection & Testing PMI, UT, Hydrostatic Testing, Visual Inspection
Corrosion Resistance Excellent (depends on selected material grade)
Application Oil & Gas, Petrochemical, Chemical Processing, Water Treatment, Power Plants
Origin India (Export Quality)

3 1/2 Inch Slip On Flange (90 mm) – Product Description

A 3 1/2 Inch Slip On Flange (90 mm) is a high-performance piping component designed to slide over the pipe and be secured using fillet welds on both the internal and external sides. Known for its ease of installation, precise alignment, and cost efficiency, this flange is widely used in low to medium pressure applications across various industries.

Manufactured in accordance with ASME B16.5 and ASTM standards, the slip on flange ensures excellent dimensional accuracy, strength, and long-term durability. This size is particularly suitable for piping systems requiring moderate to high flow capacity while maintaining structural integrity.

Slip On Flanges are preferred in industrial piping due to their simple design and reduced installation time, making them a practical solution for projects where efficiency and cost control are critical.

Key Features

  • Easy installation and alignment with piping systems
  • Double fillet welding for strong and leak-proof joints
  • Cost-effective compared to weld neck flanges
  • Smooth internal bore for improved fluid flow
  • Suitable for low to moderate pressure applications
  • Available in wide range of materials and pressure classes

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