Service Metal
316 Stainless Steel 150# Raised Face Weld Neck Flange – Sch 10
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Description
316 Stainless Steel 150# Raised Face Weld Neck Flange – Sch 10
316 Stainless Steel Class 150 Raised Face Weld Neck Flanges – Schedule 10 provide a strong, corrosion-resistant flanged connection for piping systems where a butt-welded joint, dependable alignment, and removable bolted access are required. Manufactured from ASTM A/SA182 F316/L stainless steel, these weld neck flanges are designed for use with compatible Schedule 10 piping and Class 150 raised face flange systems.
Designed to conform to ASME B16.5 dimensional requirements, each flange features a tapered weld neck hub, a bore intended to match Schedule 10 pipe dimensions, and a precision-machined Raised Face (RF) sealing surface. The butt-weld connection creates a permanent pipe-to-flange joint while the bolted flange connection remains serviceable for maintenance, inspection, equipment access, or future piping changes.
Product Highlights
- ASTM A/SA182 F316/L stainless steel construction
- ASME B16.5 dimensional configuration
- Class 150 pressure class
- Schedule 10 bore configuration
- Weld Neck (WN) connection
- Raised Face (RF) sealing surface
- Forged stainless steel construction
- Tapered hub for improved load distribution
- Precision-machined gasket sealing face
- Enhanced corrosion resistance
- Designed for butt-weld installation to compatible Schedule 10 piping
- Suitable for industrial, chemical, water treatment, food processing, marine, mechanical, and general process piping
Technical Specifications
| Product Type | Weld Neck Flange |
|---|---|
| Material | 316/L Stainless Steel |
| Material Specification | ASTM A/SA182 F316/L |
| Pressure Class | Class 150 |
| Pipe Schedule | Schedule 10 |
| Connection Type | Weld Neck / Butt Weld |
| Face Type | Raised Face (RF) |
| Dimensional Standard | ASME B16.5 |
| Construction | Forged Stainless Steel |
| Primary Function | Permanent Butt-Weld Pipe Connection with Removable Bolted Flange Joint |
| Typical Applications | Industrial, Chemical, Water Treatment, Food Processing, Marine, Mechanical and General Process Piping |
Construction Details
These Schedule 10 weld neck 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 flange incorporates a tapered weld neck hub and a bore intended for use with compatible Schedule 10 pipe. The flange is butt welded directly to the adjoining pipe, creating a permanent welded connection while preserving a removable bolted joint at the flange face.
Why Choose a Schedule 10 316 Stainless Steel Weld Neck 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
Schedule 10 Butt-Weld Connection
- Bore intended to match compatible Schedule 10 piping
- Butt-weld connection creates a permanent pipe-to-flange joint
- Tapered hub helps distribute mechanical stress
- Provides reliable pipe and flange alignment
- 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.
Schedule 10 Bore
The weld neck bore is configured for use with compatible Schedule 10 piping, helping provide proper alignment between the flange bore and adjoining pipe when the correct size is selected.
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.
Common Applications
Industrial & Process Piping
- Chemical processing systems
- Water and wastewater treatment
- Food and beverage processing
- Marine and coastal piping
- General industrial process piping
Schedule 10 Piping Systems
- 316 stainless steel Schedule 10 process piping
- Pump and valve connections
- Pressure vessel and equipment connections
- Mechanical piping systems
- Piping assemblies requiring removable flanged access
How a Weld Neck Flange Works
A weld neck flange is designed to be butt welded directly to the adjoining pipe. For this Schedule 10 configuration, the flange bore is selected to correspond with compatible Schedule 10 piping dimensions.
The tapered hub provides a gradual transition from the flange body into the adjoining pipe. Proper alignment of the flange bore and pipe helps support a smooth internal transition and a strong welded connection.
Once welded to the pipe, 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, Schedule 10 piping, 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.
Schedule 10 Weld Neck Installation Considerations
- Confirm the correct nominal pipe size before installation.
- Verify that the selected flange bore is compatible with the Schedule 10 pipe wall thickness and dimensions.
- Confirm that the mating flange is compatible with the Class 150 raised face configuration.
- Prepare and clean the pipe and flange weld-end surfaces before welding.
- Properly align the flange bore with the adjoining pipe before tack welding.
- Confirm the weld-end geometry and required weld preparation before fabrication.
- Use an appropriate qualified welding procedure for the 316 stainless steel material and piping service.
- 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.
- Follow applicable welding, flange-bolting, gasket-installation, and piping-code requirements.
- Installation and welding should be performed by qualified personnel familiar with stainless steel weld neck piping systems.
Product Selection Considerations
Size, Bore & Schedule
Confirm the required nominal pipe size, Schedule 10 pipe wall, flange bore, and Class 150 designation before ordering. The flange bore and weld end should match the adjoining piping requirements.
Material & Service Conditions
Confirm that ASTM A/SA182 F316/L stainless steel is 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, Schedule 10 piping requirements, pressure class, material, face type, application, corrosion-resistance requirements, and other project requirements before you order.
Frequently Asked Questions
What is a Schedule 10 316 stainless steel weld neck flange used for?
It is used to create a butt-welded flange connection to compatible Schedule 10 piping while retaining a removable bolted flange joint for equipment access, maintenance, inspection, or piping changes.
What material is this 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 weld neck flange designed for use with compatible Class 150 flange-system components.
What does Schedule 10 mean on a weld neck flange?
Schedule 10 identifies the intended adjoining pipe wall configuration. The weld neck flange bore should be selected to match the dimensions of the compatible Schedule 10 pipe used in the installation.
What does Weld Neck or WN mean?
Weld Neck refers to the flange connection configuration. The flange has a tapered hub and weld end designed to be butt welded directly to the adjoining pipe.
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.
Does the flange bore need to match the pipe schedule?
Yes. Weld neck flange bore selection should be compatible with the adjoining pipe size and wall thickness so the flange and pipe can be properly aligned and welded.
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, Schedule 10 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 Weld Neck Flange.
- Material: ASTM A/SA182 F316/L stainless steel.
- Pressure class: Class 150.
- Pipe schedule: Schedule 10.
- Connection type: Weld Neck / Butt Weld.
- Face configuration: Raised Face (RF).
- Designed around applicable ASME B16.5 dimensional requirements.
- Confirm the required nominal pipe size before ordering.
- Confirm Schedule 10 pipe wall thickness, flange bore, and weld-end compatibility.
- 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.
