Merit Brass
Stainless Steel RF Weld Neck Flange S40 Bore
- SKU:
- SFWNSS
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
Stainless Steel RF Weld Neck Flange Sch40 (Std) Bore
Stainless Steel Raised Face Weld Neck Flanges with Schedule 40 / Standard Bore are designed for welded piping systems requiring strength, dimensional accuracy, corrosion resistance, and dependable flange performance. The tapered weld neck provides a smooth transition between the flange and pipe, helping distribute mechanical stress through the connection.
Available in 150# and 300# pressure classes and in both 304L and 316L stainless steel, these forged flanges are suited for industrial, commercial, process, chemical, marine, food, water treatment, and general stainless steel piping applications.
Product Highlights
- Raised face weld neck flange design
- Schedule 40 / standard bore
- Available in 150# and 300# pressure classes
- Available in 304L and 316L stainless steel
- Forged stainless steel construction
- Material conforms to ASME A182
- Flange dimensions conform to ASME B16.5
- Designed for welded piping connections
- Tapered hub helps distribute stress through the flange-to-pipe connection
- Manufactured in an ISO 9001:2008 certified facility
Weld Neck Design
The weld neck design uses a tapered hub that transitions gradually from the flange body to the connected pipe. This configuration is commonly used where the piping system requires a strong welded connection and improved stress distribution.
The flange is intended to be butt welded to compatible pipe, creating a continuous welded connection between the pipe and flange hub.
Technical Specifications
| Product Type | Raised Face Weld Neck Flange |
|---|---|
| Bore | Schedule 40 / Standard Bore |
| Pressure Classes | 150# & 300# |
| Available Materials | 304L Stainless Steel & 316L Stainless Steel |
| Construction | Forged Stainless Steel |
| Connection Type | Weld Neck |
| Flange Face | Raised Face |
| Material Standard | ASME A182 |
| Dimensional Standard | ASME B16.5 |
| Manufacturing Quality | ISO 9001:2008 Certified Facility |
Schedule 40 / Standard Bore
This flange configuration is supplied with a Schedule 40 / standard bore intended to match compatible Schedule 40 pipe dimensions.
Always confirm nominal pipe size, actual pipe wall thickness, bore dimensions, and system requirements before ordering or welding the flange into a piping system.
150# vs. 300# Pressure Class
150# Class
- Class 150 flange configuration
- Commonly used in general commercial and industrial piping systems
- Raised face design for compatible gasketed flange assemblies
- Available in 304L and 316L stainless steel
300# Class
- Class 300 flange configuration
- Designed for applications requiring a higher flange pressure class
- Raised face design for compatible gasketed flange assemblies
- Available in 304L and 316L stainless steel
304L vs. 316L Stainless Steel
304L Stainless Steel
- General-purpose stainless steel grade
- Good corrosion resistance for many commercial and industrial systems
- Commonly used in water, food, process, and mechanical piping
- Low-carbon grade supports compatible welding applications
316L Stainless Steel
- Enhanced corrosion resistance for more demanding environments
- Commonly selected for marine and chloride-exposed service
- Suitable for many chemical and process piping applications
- Low-carbon grade supports compatible welding applications
Forged Stainless Steel Construction
These weld neck flanges are manufactured from forged stainless steel material conforming to ASME A182. Forged construction provides strength, dimensional consistency, and durability for demanding piping applications.
Flange dimensions conform to ASME B16.5 for compatibility with applicable Class 150 and Class 300 flange systems.
Common Applications
Industrial & Process Piping
- Industrial piping systems
- Chemical processing
- Water treatment
- Mechanical equipment connections
- General process piping
Corrosion-Resistant Systems
- Food processing
- Marine piping
- Stainless steel fabrication
- Commercial piping systems
- Applications requiring 304L or 316L stainless construction
Important Ordering Notes
- Product type: Raised face weld neck flange.
- Bore: Schedule 40 / standard bore.
- Available pressure classes: 150# and 300#.
- Available materials: 304L and 316L stainless steel.
- Forged stainless steel material conforms to ASME A182.
- Flange dimensions conform to ASME B16.5.
- Manufactured in an ISO 9001:2008 certified facility.
- Confirm nominal pipe size and Schedule 40 bore compatibility before ordering.
- Verify pressure class, temperature limitations, gasket selection, bolting, and media compatibility before installation.
- Confirm the correct stainless steel grade for the intended service environment.
- Welding should be performed using procedures appropriate for the flange material and connected piping.
- Refer to the Stainless Steel ANSI Flange Dimensions PDF for dimensional information.
Product Documents
Frequently Asked Questions
What does RF mean?
RF means Raised Face. The gasket sealing surface is raised above the surrounding flange face for use in compatible gasketed flange assemblies.
What is a weld neck flange?
A weld neck flange has a tapered hub designed to be butt welded directly to compatible pipe. The gradual transition through the hub helps distribute stress through the flange-to-pipe connection.
What bore is supplied with these flanges?
These flanges are supplied with a Schedule 40 / standard bore.
What pressure classes are available?
This product is available in 150# and 300# pressure classes.
What stainless steel grades are available?
These weld neck flanges are available in 304L and 316L stainless steel.
What material standard applies to these flanges?
The forged stainless steel material conforms to ASME A182.
What dimensional standard applies?
The flange dimensions conform to ASME B16.5.
What is the difference between 304L and 316L?
Both are corrosion-resistant stainless steel grades. 316L is generally selected for more demanding corrosive environments, including many marine, chloride, and chemical-service applications.
Can a Schedule 40 bore be used with any pipe?
No. Confirm nominal pipe size, actual wall thickness, bore dimensions, material, and welding requirements before installation.
Where can I find flange dimensions?
Use the Stainless Steel ANSI Flange Dimensions PDF in the support section above for dimensional information.
Ask Willy: Product Selection & Support
Our GetPipe.com team can help review sizing, material, connection requirements, and product information before you order.
