Threaded Flanges
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Threaded Flanges
🔍 What is a Threaded Flange?
A Threaded Flange (also called a Screwed Flange) is designed to be screwed onto a pipe with a matching male thread. It allows connection without welding, making it ideal for high-pressure, low-temperature systems or environments where welding is hazardous.
🧱 Types of Threaded Flanges
| Type | Description | Common Use |
| Plain Threaded | Standard thread bore for general use | Oil pipelines, civil water systems |
| Threaded with Seal Weld | Threaded plus small weld for extra sealing | Oil & gas pressure lines |
| Raised Face (RF) | Slightly raised sealing surface to accommodate a gasket | ANSI piping systems |
| Flat Face (FF) | Flat contact face for full gasket contact | DIN waterworks systems |
| Custom Thread Types | NPT, BSPT, BSPP based on regional specs | International installations |
🌐 Threaded Flange Standards – ANSI & DIN
| Standard | Pressure Ratings | Used In |
| ANSI / ASME B16.5 | Class 150, 300, 600, 900 | Oilfield piping, chemical plants |
| DIN EN 1092-1 | PN 6, PN 10, PN 16 | Civil waterworks, marine pipe systems |
📊 Pressure Ratings of Threaded Flanges
| Standard | Class / Rating | Max Pressure (approx.) |
| ANSI Class 150 | 285 psi (19.6 bar) | Low-pressure lines (non-weld) |
| ANSI Class 300 | 740 psi (51 bar) | Crude lines, instrument piping |
| ANSI Class 600 | 1480 psi (102 bar) | High-pressure oilfield systems |
| DIN PN10 | 145 psi (10 bar) | Civil water & marine utility pipes |
| DIN PN16 | 232 psi (16 bar) | Stormwater lines, HVAC |
🔧 Threaded Flange Materials
| Material | Common Grades | Suitable For |
| Carbon Steel | ASTM A105 / A350 LF2 | Oil pipelines, civil works |
| Stainless Steel | ASTM A182 F304 / F316 / F316L | Marine piping, food-grade piping |
| Galvanized Carbon Steel | Hot-dip or electroplated | Rust protection in water/civil lines |
| Duplex Stainless | UNS S31803 / S32750 | Saltwater, offshore platforms |
| Alloy Steel | ASTM A182 F11, F22 | High-temperature & pressure oil lines |
| Brass / Bronze | Custom orders | Marine systems & coastal water supplies |
🛠 Industry Applications
🛢 Oilfield Industry
- Used in high-pressure fuel lines, test manifolds, and wellhead connections
- Threaded with seal weld offers extra safety in volatile environments
- Ideal for locations where welding sparks are hazardous
🚢 Marine Sector
- Used for seawater intake lines, cooling systems, and ship engine rooms
- Stainless and duplex threaded flanges resist corrosion
- Often in DIN PN10/PN16 standards for European systems
🏗 Civil & Utility Works
- Common in potable water systems, fire hydrants, and stormwater drains
- Easy installation where welding is not practical
- Cost-effective with galvanized or carbon steel
✅ Advantages of Threaded Flanges
- 🔧 No welding required – ideal for explosive zones
- 🔁 Easy to install or remove – perfect for maintenance
- 🌍 Compliant with ANSI and DIN global standards
- ⚙ Available in multiple materials and pressure ratings
Your trusted Threaded Flange suppliers in Dubai, Burj Al Noor Trading L.L.C offers a comprehensive range of non-welded flange solutions designed for industrial, marine, oilfield, and civil infrastructure applications. For those wondering what is a threaded flange or seeking to understand the screwed flange meaning, these flanges feature internal threads that allow them to be screwed onto externally threaded pipes, creating a non-welded flange connection ideal for low-pressure or hazardous areas where welding is not practical. We supply all types of threaded flanges, including Raised Face (RF) threaded flanges, NPT screwed flanges, and specialty oilfield threaded flanges.
Our product range includes ANSI threaded flange class 300, class 150 threaded flanges, and threaded class 600 flanges for gas lines, built to handle varying pressure and temperature requirements. We also stock DIN PN16 threaded flange dimensions, DIN PN10 flanges for drainage, and PN16 threaded flanges for use in civil pipeline systems. With an extensive threaded flange pressure class selection and a complete pressure rating chart available, we ensure precise matching to your system’s demands.
Our threaded flanges come in a variety of materials to suit application needs. We offer carbon steel threaded flanges for water pipelines and general industrial use, F316 threaded flanges for marine use, marine-grade threaded flanges, and duplex threaded flange options for offshore, chemical, and corrosive environments. We also supply PN16 stainless steel flanges for ships and threaded seawater flanges, specifically designed for long-lasting performance in marine and coastal systems.
Threaded flanges are widely used in plumbing, oil & gas, fire protection, and non-weld flange connections for waterworks. They offer key benefits of threaded flanges such as ease of installation, disassembly, and no need for welding—making them ideal for maintenance-heavy or explosive environments. Whether you’re comparing ANSI vs DIN flange connections or deciding where to use threaded flanges in your project, our team is here to assist with product selection and technical support.
As leading Threaded Flange suppliers in Dubai, Burj Al Noor Trading L.L.C serves clients across the UAE, GCC, and Africa with quality products, competitive pricing, and fast delivery timelines. For secure, corrosion-resistant, and maintenance-friendly flange solutions, count on Burj Al Noor Trading—where safety and efficiency come together.
We deal in all kinds of flanges, including: Weld Neck Flange, Slip-On Flange, Blind Flange, Threaded Flange, Socket Weld Flange, Lap Joint Flange, Long Weld Neck Flange, Orifice Flange, Spectacle Blind Flange, Ring Type Joint (RTJ) Flange, Forged Flange, Plate Flange, Reducing Flange, and Custom Flanges.
