Slip On Flange

Slip On Flange

Description

Slip On Flange is widely used in industrial piping systems where easy alignment, installation efficiency and cost control are important considerations. The flange is slipped over the pipe and fillet welded on both inside and outside, providing adequate strength for low and medium pressure piping systems.

Slip on flanges are commonly used in petrochemical plants, water treatment facilities, offshore platforms, power plants and general industrial piping systems. Compared with weld neck flanges, slip on flanges are easier to install and align during site erection, which helps reduce installation time and labor cost in large piping projects.

In many EPC projects, slip on flanges are supplied together with stainless steel pipes and fittings as part of a complete piping material package.

Specifications / Standards

Slip On Flanges are manufactured in accordance with international piping flange standards and project specifications. The manufacturing, dimensional tolerances and pressure ratings are strictly controlled according to applicable standards.

Common standards include:

• ASME B16.5
• ASME B16.47 Series A / Series B
• EN 1092-1
• DIN 2576 / DIN 2642
• ISO 7005
• MSS SP-44
• API 605

Inspection and certification can be supplied according to EN 10204 3.1 or EN 10204 3.2 with third-party inspection such as SGS, BV or TÜV if required by project specifications.

Slip on flanges are frequently supplied together with butt weld pipe fittings and pipes for complete piping system procurement.

Material Grades

Slip On Flanges are available in carbon steel, stainless steel, duplex stainless steel and nickel alloy materials for various industrial environments and corrosion conditions.

Common material grades include:

Material selection depends on operating temperature, pressure, corrosion environment and project specifications from EPC contractors or end users.

Size Range

Slip On Flange size range typically includes:

• Size: 1/2” to 80”
• Pressure Rating: Class 150 / 300 / 600 / 900 / 1500 / 2500
• Facing Type: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
• Suitable for various pipe wall thickness and schedules

Large diameter flanges for offshore, LNG, desalination and power plant projects can be manufactured according to project drawings and technical specifications.

Manufacturing Process

Slip On Flanges are manufactured from forged materials or rolled rings depending on size, material grade and project requirements.

Typical manufacturing process includes:

• Raw material inspection
• Cutting and forging or ring rolling
• Heat treatment
• Rough machining
• Finish machining
• Drilling
• Marking and traceability control
• Final dimensional inspection

For project supply, flanges are often supplied together with prefabrication pipe spools and piping components to reduce site welding workload and installation time.

Inspection & Testing

Inspection and testing are performed according to project specifications and international standards.

Typical inspection and testing include:

• Visual inspection
• Dimensional inspection
• PMI (Positive Material Identification)
• Mechanical testing
• Hardness testing
• NDT testing (UT / RT / PT / MT if required)
• Third-party inspection
• EN 10204 3.1 / 3.2 certification

Full material traceability can be maintained from raw material heat number to final flange marking and documentation package.

Applications / Industries

Slip On Flanges are widely used in industrial piping systems across many industries:

• Oil & Gas
• Petrochemical Plants
• LNG Projects
• Offshore Platforms / FPSO
• Power Plants
• Nuclear Projects
• Desalination Plants
• Water Treatment Plants
• Chemical Plants
• Heavy Industrial Facilities

Slip on flanges are typically used in piping systems where alignment flexibility, ease of installation and maintenance accessibility are required.

Packaging & Delivery

Flanges are packed in wooden cases or wooden pallets suitable for international transportation. Anti-rust oil or protective coating is applied to prevent corrosion during shipment and storage.

Each flange marking typically includes:

• Size
• Pressure rating
• Material grade
• Heat number
• Standard
• Manufacturer identification

Shipping documents normally include packing list, commercial invoice, mill test certificates and inspection reports.

Why Choose Us

We supply flanges not only as individual components but as part of engineered piping material supply packages for EPC contractors, project owners and industrial stockists.

Our supply scope includes pipes, fittings, flanges, plates, bars and prefabricated piping components manufactured according to international standards and project specifications.

With experience in supplying materials for oil & gas, petrochemical, offshore, LNG, nuclear and power plant projects, we understand project documentation requirements, inspection procedures and material traceability systems required by EPC contractors and end users.