Service Metal
304 Stainless Steel 150# Flat Face Lap Joint Flange
- Availability:
- Allow 1-2 Days to Ship
- Weight:
- 0.00 LBS
Description
304 Stainless Steel 150# Flat Face Lap Joint Flange
304 Stainless Steel Class 150 Flat Face Lap Joint Flanges are designed for use with compatible lap joint stub ends, providing a practical flanged connection that allows the flange to rotate freely for easier bolt-hole alignment during installation. Manufactured from ASTM A/SA182 F304/L stainless steel, these flanges offer corrosion resistance, strength, and dependable performance in a wide range of piping systems.
Manufactured to ASME B16.5 dimensional standards, these Class 150 lap joint flanges feature a Flat Face (FF) configuration and are available in nominal pipe sizes from 1" through 8". They are suitable for process, chemical, food and beverage, water, and general industrial piping applications where compatible lap joint stub ends are used.
Product Highlights
- ASTM A/SA182 F304/L stainless steel construction
- ASME B16.5 dimensional standard
- Class 150 pressure class
- Flat Face (FF) configuration
- Designed for use with compatible lap joint stub ends
- Rotating flange simplifies bolt-hole alignment
- Excellent corrosion resistance
- Suitable for process, chemical, food, beverage, and water systems
- Available in nominal pipe sizes from 1" through 8"
Technical Specifications
| Product Type | Lap Joint Flange |
|---|---|
| Material | 304/L Stainless Steel |
| Material Specification | ASTM A/SA182 F304/L |
| Pressure Class | Class 150 |
| Face Type | Flat Face (FF) |
| Dimensional Standard | ASME B16.5 |
| Available Sizes | 1" through 8" Nominal Pipe Size |
| Construction | Forged Stainless Steel |
| Connection Method | Used with Compatible Lap Joint Stub Ends |
| Primary Applications | Process, Chemical, Food, Beverage, Water and General Industrial Piping |
Construction Details
These lap joint flanges are constructed from dual-certified ASTM A/SA182 F304/L stainless steel for corrosion resistance, strength, and dependable long-term service.
The lap joint configuration allows the flange to rotate freely around a compatible stub end. This rotating design can simplify bolt-hole alignment during initial installation, system assembly, and future maintenance.
The flange dimensions conform to ASME B16.5 requirements for compatibility with appropriate Class 150 piping components.
Why Choose a Lap Joint Flange?
Easier Bolt Alignment
- Flange rotates independently around the stub end
- Simplifies bolt-hole alignment during assembly
- Useful where piping orientation makes alignment difficult
- Can reduce installation adjustment requirements
- Convenient for systems requiring periodic disassembly
304/L Stainless Steel Construction
- Excellent general corrosion resistance
- Suitable for many industrial environments
- Useful in process and water piping applications
- Well suited for food and beverage systems where compatible
- Designed for dependable long-term piping service
Performance Features
Class 150 Design
Designed for use in compatible ASME B16.5 Class 150 piping systems with appropriate stub ends, mating components, gaskets, and bolting.
Rotating Flange Body
The flange can rotate around the lap joint stub end, allowing the bolt pattern to be aligned independently of the connected piping.
Flat Face Configuration
The Flat Face (FF) configuration is intended for applications where a compatible flat face mating arrangement is required.
Common Applications
Industrial & Process Piping
- Process piping systems
- Chemical piping
- Industrial water systems
- General plant piping
- Corrosion-resistant piping assemblies
Food, Beverage & Water Systems
- Food processing piping
- Beverage processing systems
- Water treatment systems
- Utility water piping
- Applications requiring stainless steel corrosion resistance
How a Lap Joint Flange Works
A lap joint flange is used together with a compatible stub end. The stub end is connected to the piping, while the flange remains loose behind the stub end and can rotate independently around the pipe.
This design allows the flange bolt holes to be aligned with the mating flange without rotating the connected pipe or stub end. Once properly aligned, the flange assembly is secured using appropriate bolting.
The arrangement can be especially useful in systems where frequent dismantling, inspection, maintenance, or precise bolt alignment is required.
Flat Face Flange Design
This lap joint flange uses a Flat Face (FF) configuration. Flat face flange arrangements are used where the sealing surfaces of the mating components are designed to remain in the same plane.
Always verify that the mating flange, stub end, gasket, bolting, and related components are compatible with the flange size, pressure class, material, service conditions, and project requirements before installation.
Installation Considerations
- Confirm the correct nominal pipe size before ordering or installation.
- Verify compatibility with the selected lap joint stub end.
- Confirm that mating flanges and components are suitable for Class 150 service.
- Use a gasket suitable for the flange configuration and piping service.
- Use appropriate flange bolts, studs, nuts, and associated hardware.
- Verify material compatibility with the process fluid and operating environment.
- Confirm applicable pressure and temperature requirements before installation.
- Inspect flange and stub-end sealing surfaces before assembly.
- Align the flange bolt pattern before tightening the bolting.
- Follow applicable piping codes, project specifications, and installation procedures.
- Installation should be completed by qualified personnel familiar with flanged piping systems.
Product Selection Considerations
Stub End Compatibility
Lap joint flanges are designed to be used with compatible stub ends. Confirm the stub-end size, material, dimensions, and flange compatibility before ordering.
Service Conditions
Verify that ASTM A/SA182 F304/L stainless steel, the Class 150 pressure class, and the Flat Face configuration are suitable for the intended operating pressure, temperature, process fluid, and piping system.
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, stub-end requirements, piping application, and other project requirements before you order.
Frequently Asked Questions
What is a lap joint flange used for?
A lap joint flange is used with a compatible stub end to create a bolted flanged connection while allowing the flange body to rotate independently for easier bolt-hole alignment.
What material is this lap joint flange made from?
This flange is manufactured from ASTM A/SA182 F304/L stainless steel.
What pressure class is this flange?
This product is a Class 150 lap joint flange designed to conform to applicable ASME B16.5 dimensional requirements.
What does Flat Face or FF mean?
Flat Face refers to the flange face configuration. The sealing surface is designed as a flat mating surface for use with compatible flat face piping components and gasket arrangements.
Does a lap joint flange require a stub end?
Yes. This flange is designed to be used with a compatible lap joint stub end. The stub end connects to the piping while the flange remains free to rotate behind it.
Why does the flange rotate?
The rotating design allows the bolt holes to be aligned with the mating flange without requiring the connected pipe or stub end to be rotated.
What sizes are available?
These stainless steel Class 150 lap joint flanges are available in nominal pipe sizes from 1" through 8".
What standard does this flange conform to?
The supplied product information identifies these lap joint flanges as conforming to ASME B16.5 dimensional standards.
Where are stainless steel lap joint flanges commonly used?
Typical applications include process, chemical, food and beverage, water, and general industrial piping systems where compatible lap joint stub ends are used.
What should I verify before ordering?
Confirm the nominal pipe size, Class 150 designation, Flat Face configuration, stainless steel material, stub-end compatibility, gasket requirements, and operating conditions before ordering.
Important Ordering Notes
- Product type: Flat Face Lap Joint Flange.
- Material: ASTM A/SA182 F304/L stainless steel.
- Pressure class: Class 150.
- Face configuration: Flat Face (FF).
- Designed for use with compatible lap joint stub ends.
- Dimensions conform to ASME B16.5 requirements as identified in the supplied product information.
- Available in nominal pipe sizes from 1" through 8".
- Confirm flange and stub-end size compatibility before ordering.
- Verify gasket, bolting, and mating flange compatibility.
- Confirm material compatibility with the intended process fluid and operating environment.
- Verify pressure and temperature requirements for the specific application.
- Consult applicable piping codes and project specifications before installation.
- Installation should be completed by qualified personnel.
