Service Metal
316 Stainless Steel 150# Raised Face Slip-On Flange
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Description
316 Stainless Steel 150# Raised Face Slip-On Flange
316 Stainless Steel Class 150 Raised Face Slip-On Flanges provide a practical, corrosion-resistant flanged connection for piping systems where straightforward fit-up and welded attachment are desired. Manufactured from ASTM A/SA182 F316/L stainless steel, these flanges combine mechanical strength, durability, and enhanced corrosion resistance for demanding industrial, chemical, water treatment, food processing, marine, and general process piping applications.
Designed to conform to ASME B16.5 dimensional requirements, each slip-on flange features a bore that allows the pipe to pass through the flange before welding and a precision-machined Raised Face (RF) sealing surface. The slip-on design simplifies positioning and alignment prior to welding while retaining a removable bolted flange joint for maintenance, inspection, equipment access, or piping changes.
Product Highlights
- ASTM A/SA182 F316/L stainless steel construction
- ASME B16.5 dimensional configuration
- Class 150 pressure class
- Slip-On (SO) flange design
- Raised Face (RF) sealing surface
- Forged stainless steel construction
- Enhanced corrosion resistance
- Pipe slips through flange bore for easier positioning
- Typically secured with fillet welds
- Precision-machined gasket sealing face
- Suitable for industrial, chemical, water treatment, food processing, marine, and general process piping
Technical Specifications
| Product Type | Slip-On Flange |
|---|---|
| Material | 316/L Stainless Steel |
| Material Specification | ASTM A/SA182 F316/L |
| Pressure Class | Class 150 |
| Connection Type | Slip-On / Welded |
| Face Type | Raised Face (RF) |
| Dimensional Standard | ASME B16.5 |
| Construction | Forged Stainless Steel |
| Primary Function | Welded Pipe Connection with Removable Bolted Flange Joint |
| Typical Applications | Industrial, Chemical, Water Treatment, Food Processing, Marine, Mechanical and General Process Piping |
Construction Details
These slip-on flanges are forged from dual-certified ASTM A/SA182 F316/L stainless steel for strength, durability, and enhanced corrosion resistance in demanding piping environments.
The raised face sealing surface is precision machined to applicable ASME B16.5 dimensional requirements to provide a dependable gasket sealing surface when installed with compatible Class 150 raised face flange components.
The slip-on construction allows the pipe to pass through the flange bore before final positioning. Once aligned, the flange is typically secured to the pipe with fillet welds, creating a permanent pipe-to-flange connection while retaining a removable bolted joint at the flange face.
Why Choose a 316 Stainless Steel Slip-On Flange?
Enhanced Corrosion Resistance
- Manufactured from 316/L stainless steel
- Provides improved corrosion resistance in many demanding environments
- Well suited for chemical and water treatment systems
- Useful in coastal and marine environments
- Suitable for food processing and general industrial service
Simple Fit-Up & Alignment
- Pipe passes through the flange bore
- Allows convenient positioning before welding
- Often easier to align than butt-weld flange styles
- Suitable for many general-purpose piping installations
- Retains a removable bolted flange connection for servicing
Performance Features
Class 150 Design
Designed for use as part of a compatible ASME B16.5 Class 150 flange system with appropriate mating flanges, gaskets, bolting, piping, and associated components.
Raised Face Sealing
The precision-machined raised face provides the gasket sealing surface required for use with compatible raised face gaskets and mating Class 150 flange components.
316/L Stainless Steel
ASTM A/SA182 F316/L stainless steel provides a combination of mechanical strength, durability, and enhanced corrosion resistance for demanding piping service.
Common Applications
Industrial & Process Piping
- Chemical processing systems
- Water and wastewater treatment
- Food and beverage processing
- Marine and coastal piping
- General industrial process piping
General Flanged Connections
- Pump connections
- Valve connections
- Process equipment connections
- Mechanical piping systems
- Piping assemblies requiring removable bolted access
How a Slip-On Flange Works
A slip-on flange has an internal bore larger than the outside diameter of the mating pipe, allowing the pipe to slide through the flange before welding.
The flange is positioned on the pipe to provide the required relationship between the pipe end and flange face. After proper alignment, fillet welds are applied according to the applicable fabrication procedure to secure the flange to the pipe.
Once welded in place, the flange can be bolted to a compatible mating flange, valve, vessel, or equipment connection using an appropriate gasket and bolting arrangement.
Raised Face Flange Design
The Raised Face (RF) configuration concentrates the gasket sealing area on the machined raised portion of the flange face. When properly assembled with a compatible gasket and mating raised face flange, bolt loading compresses the gasket between the sealing surfaces.
Always confirm that the mating flange, gasket, bolting, and associated components are compatible with the flange size, Class 150 designation, material, service conditions, and applicable piping-system requirements.
316 Stainless Steel Construction
316/L stainless steel contains molybdenum, which contributes to improved resistance to pitting and localized corrosion in many environments compared with 304-series stainless steel.
This makes 316/L stainless steel a common material choice for chemical processing, water treatment, marine, coastal, food processing, and other piping applications where increased corrosion resistance is desirable.
Actual material suitability depends on the process media, chemical concentration, temperature, pressure, environmental exposure, and applicable piping-system requirements. Compatibility should always be verified for the intended service.
Slip-On Flange Installation Considerations
- Confirm the correct nominal pipe size before installation.
- Verify that the flange bore is compatible with the adjoining pipe outside diameter.
- Confirm that the mating flange is compatible with the Class 150 raised face configuration.
- Prepare and clean the pipe and flange surfaces before welding.
- Position the flange correctly on the pipe before tack welding.
- Maintain proper pipe-end setback and flange orientation according to applicable fabrication requirements.
- Use an appropriate qualified welding procedure for the stainless steel material and piping service.
- Apply the required fillet welds according to project and code requirements.
- Select a gasket suitable for the raised face configuration and process conditions.
- Use appropriate flange bolts, studs, nuts, and related hardware.
- Confirm material compatibility with the process fluid and operating environment.
- Verify applicable pressure and temperature requirements before installation.
- Inspect flange sealing surfaces for damage or contamination before assembly.
- Properly align mating flanges before tightening bolting.
- Installation and welding should be performed by qualified personnel familiar with stainless steel flanged piping systems.
Product Selection Considerations
Size & Pipe Compatibility
Confirm the required nominal pipe size, pipe outside diameter, and Class 150 flange designation before ordering. The slip-on flange bore must be suitable for the adjoining pipe.
Material & Service Conditions
Confirm that ASTM A/SA182 F316/L stainless steel and the slip-on flange connection are suitable for the process fluid, operating environment, pressure, temperature, and applicable piping-system requirements.
Product Documents
Reference the available pipe sizing information, Service Metal specification sheet, and Certificate of Conformance for additional product and piping information.
Need Help Selecting a Stainless Steel Flange?
Our industrial PVF specialists can help review your flange size, pressure class, material, face type, pipe dimensions, piping application, corrosion-resistance requirements, and other project requirements before you order.
Frequently Asked Questions
What is a 316 stainless steel slip-on flange used for?
A slip-on flange is used to create a welded flange connection by sliding the flange over the adjoining pipe and securing it in position with appropriate welds. It is commonly used in industrial, process, mechanical, and equipment piping systems.
What material is this slip-on flange made from?
This flange is manufactured from ASTM A/SA182 F316/L stainless steel.
What pressure class is this flange?
This product is a Class 150 slip-on flange designed for use with compatible Class 150 flange-system components.
What does Slip-On or SO mean?
Slip-On refers to the flange connection configuration. The flange bore fits over the adjoining pipe, allowing the flange to be positioned before it is welded in place.
Does a slip-on flange require welding?
Yes. A slip-on flange is typically secured to the pipe using fillet welds applied according to the applicable fabrication procedure and piping-system requirements.
What does Raised Face or RF mean?
Raised Face refers to the flange sealing configuration. The gasket sealing area is located on a machined raised portion of the flange face that mates with a compatible raised face flange and gasket.
What standard applies to this flange?
The flange is designed around applicable ASME B16.5 dimensional requirements for Class 150 flanged piping components.
What is the advantage of a slip-on flange?
The slip-on design allows the flange to be positioned over the pipe before welding, which can simplify fit-up and alignment in many general piping applications.
What is the advantage of 316 stainless steel?
316/L stainless steel generally provides improved resistance to pitting and localized corrosion in many demanding environments compared with 304-series stainless steel.
What gasket should be used with this flange?
The gasket must be compatible with the Class 150 raised face flange configuration as well as the process fluid, pressure, temperature, and other operating conditions. Verify gasket requirements for the specific piping system before installation.
How do I determine the pressure and temperature rating?
Pressure and temperature capabilities depend on the applicable ASME B16.5 requirements, material specification, flange size, piping configuration, and service conditions. Verify the allowable rating for the specific installation before placing the flange into service.
Important Ordering Notes
- Product type: Raised Face Slip-On Flange.
- Material: ASTM A/SA182 F316/L stainless steel.
- Pressure class: Class 150.
- Connection type: Slip-On / Welded.
- Face configuration: Raised Face (RF).
- Designed around applicable ASME B16.5 dimensional requirements.
- Confirm the required nominal pipe size before ordering.
- Verify flange bore compatibility with the adjoining pipe outside diameter.
- Verify compatibility with the mating flange, gasket, bolting, and associated piping components.
- Confirm 316/L stainless steel compatibility with the intended process fluid and operating environment.
- Pressure and temperature requirements should be verified for the specific installation.
- Use appropriate stainless steel welding procedures and qualified personnel.
- Installation should comply with applicable piping codes and project requirements.
