SO Flange (Slip On Flange)

Overview

Slip-On Flanges (SO Flanges) are versatile pipe components designed for medium- and low-pressure piping systems. Their simple slip-on design allows pipes to be inserted and welded at the flange base, providing a reliable and cost-effective connection.

Manufactured in compliance with international standards, our SO Flanges are suitable for oil & gas, chemical, petrochemical, power generation, and water treatment industries worldwide.

Product Features

  • Easy Installation: Pipe slides into flange bore and is fillet-welded at the base; installation is straightforward and time-saving.

  • Material Excellence: Available in Carbon Steel, Stainless Steel, Alloy Steel, providing excellent corrosion resistance and mechanical performance.

  • Wide Size Range: DN15 – DN600 (custom sizes available).

  • Pressure Ratings: ANSI / ASME Class 150 – 600; PN 10 – PN 40

  • Manufacturing Methods: Forged or machined for precise dimensions and smooth finish.

  • Custom Fabrication: Available per project drawings or special standards.

Standards Compliance

Our Slip-On Flanges are manufactured to international standards:

  • ASME B16.5 / B16.47 – American pipe flange standards

  • EN 1092-1 – European standard

  • DIN / JIS – Optional for European & Japanese projects

  • GOST 12820 / 12821 – Russian standard

  • Custom Standards – Available upon request

Compliance ensures reliable performance and safety in low- to medium-pressure piping systems.

Materials & Grades

  • Carbon Steel: ASTM A105, ASTM A350 LF2

  • Stainless Steel: ASTM A182 F304 / F316

  • Alloy Steel: ASTM A182 F11 / F22

Carefully selected materials guarantee strength, durability, and long service life.

Applications

Slip-On Flanges are widely used in:

  • Medium- and low-pressure pipelines

  • Oil & gas, chemical, and petrochemical plants

  • Power generation systems

  • Water treatment and desalination facilities

  • Any piping system requiring cost-effective flange connection

Ideal for projects where easy installation and moderate pressure capacity are priorities.

Why Choose Our Slip-On Flanges

  • Precision Manufacturing: Accurate dimensions and smooth surfaces for proper welds

  • Standards Compliance: ASME, EN, DIN/JIS, GOST, or custom standards

  • Material Excellence: Carbon Steel, Stainless Steel, Alloy Steel

  • Customizable Solutions: Sizes, pressure classes, and standards per drawings

  • Global Export Experience: Trusted supplier for B2B customers worldwide

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