1. Precision is the Core of Engineering
In industrial piping, "close enough" is never sufficient. Our 304/316/316L Class 150 RF Female Threaded Flanges are manufactured to exacting ASME B16.5 Class 150 Flange Dimensions, ensuring that every connection is structurally sound.
2. Core Parameters: Sizing & Threading
We offer a comprehensive range from 1/2" to 4" NPT Threaded Flanges, specifically designed to match Sch 40/Sch 80 Compatible Flanges requirements. For those utilizing the SS316L Female NPT Pipe Flange, our threads are precision-cut to exceed ANSI B16.5 Standard Forged Flanges requirements, preventing cross-threading and ensuring a pressure-tight seal.
3. Sealing Face & Structure
The Raised Face (RF) Height and Finish are critical for gasket seating. Our Threaded Hub Flange Specifications detail the precise Class 150 RF Flange Thickness and OD, along with the Bolt Circle Diameter for Class 150 Flanges, making it easy for engineers to reference our Stainless Steel RF Female Flange Chart during the design phase.
4. Technical Specification Data Sheet (ASME B16.5)
| Nominal Pipe Size (NPS) | Outside Diameter (OD) | Flange Thickness (Min) | Bolt Circle Diameter | Number of Bolt Holes | Bolt Hole Diameter |
| 1/2" (DN15) | 3.50" (90mm) | 0.38" (9.6mm) | 2.38" (60.3mm) | 4 | 0.62" (15.9mm) |
| 3/4" (DN20) | 3.88" (100mm) | 0.44" (11.2mm) | 2.75" (69.9mm) | 4 | 0.62" (15.9mm) |
| 1" (DN25) | 4.25" (110mm) | 0.50" (12.7mm) | 3.12" (79.4mm) | 4 | 0.62" (15.9mm) |
| 1-1/2" (DN40) | 5.00" (125mm) | 0.62" (15.9mm) | 3.88" (98.4mm) | 4 | 0.62" (15.9mm) |
| 2" (DN50) | 6.00" (150mm) | 0.69" (17.5mm) | 4.75" (120.7mm) | 4 | 0.75" (19.0mm) |
| 3" (DN80) | 7.50" (190mm) | 0.88" (22.3mm) | 6.00" (152.4mm) | 4 | 0.75" (19.0mm) |
| 4" (DN100) | 9.00" (230mm) | 0.88" (22.3mm) | 7.50" (190.5mm) | 8 | 0.75" (19.0mm) |
- Thread Standard: All 1/2" to 4" NPT Threaded Flanges conform to ASME B1.20.1.
- Facing Finish: Our Raised Face (RF) Height and Finish typically range between $125-250 \mu in$ AARH (serrated finish) to ensure optimal gasket compression.
- Pressure-Temperature Rating: This Class 150 RF Flange Thickness and OD configuration is rated for a maximum working pressure of 285 psi at ambient temperature for Group 2.2 materials (SS316L).
5. How can flanges be seamlessly connected to pipes?
- Why Matching Pipe Schedules (Sch 40, 80, 160) Matters
A 316L Stainless Steel NPT Flange does not operate in isolation; it must be perfectly synchronized with the pipe's wall thickness. While the Outside Diameter (OD) remains constant for a given size, the internal pressure capacity changes with the Schedule. Using Sch 40/Sch 80 Compatible Flanges ensures that the threaded engagement depth is sufficient to handle the system's stress. For high-pressure or heavy-duty environments, matching a Class 150 RF Female Threaded Flange with Sch 80 or Sch 160 piping provides the necessary material thickness to prevent thread deformation under load.
- Hub Length: The Backbone of Threaded Integrity
The Hub Length is a critical element in Threaded Hub Flange Specifications. This extended neck serves two vital functions: first, it provides a longer internal thread path for the pipe, ensuring maximum surface contact; second, it acts as a structural reinforcement that redistributes mechanical stress away from the base of the flange. Our ANSI B16.5 Standard Forged Flanges feature optimized hub dimensions that offer superior vibration resistance, making them more durable than low-quality hubs that may crack under pulsating pressure.
- Bore Matching: Ensuring Smooth Flow and System Longevity
In any Stainless Steel Pipe Flange Specifications, Bore Matching is essential to prevent "Turbulence Erosions." If the internal diameter of the Stainless Steel RF Female Flange does not align with the pipe's bore, it creates a "step" that causes fluid turbulence. Over time, this turbulence can erode the Raised Face (RF) Height and Finish, leading to premature seal failure. We ensure our 1/2" to 4" NPT Threaded Flange series is precision-machined to match the ID of standard schedules, maintaining a laminar flow that protects the system's integrity.
Selecting the correct ASME B16.5 Flange Dimensions is the foundation, but the final seal integrity relies entirely on professional assembly techniques. [Click here to read our Step-by-Step Installation Guide to ensure a leak-free connection for your threaded system.]
