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Blind Flange (BL) Carbon Steel Forged Flange
**Product Specification for Blind Flange**
- **Model No.:** Blind Flange
- **Manufacturing Way:** Forging
- **Application:** Used to seal or connect pipe/tube lines
- **Trademark:** Lockheed
- **Transport Package:** Pallets
- **Specification:** DIN / ANSI
- **Origin:** China
- **HS Code:** 7307210000
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### Types of Flanges and Their Specifications
**Welding Neck Flange**
- Ideal for high-pressure, low-temperature, or high-temperature environments.
- The hub is tapered and bored to match the pipe's inner diameter, ensuring smooth flow and reducing turbulence and erosion.
- Easy to radiograph and provides excellent stress distribution.
**Slip-On Flange**
- Not typically used in high-stress applications due to a smaller hub and weaker weld attachment.
- Slides over the outside of the pipe.
- The inside of the flange is welded at both the hub and the end of the pipe.
**Lap Joint Flange**
- Used when bolt alignment or access for cleaning is needed.
- Similar to a slip-on flange when used with a lap joint stub end.
- Has a radius at the intersection of the flange face and bore to match the stub end.
**Threaded Flange**
- Used where welding could be hazardous.
- Designed for low-pressure and non-cyclic applications.
- The bore is threaded to match the pipe thread.
- Tapered to ensure a tight seal between the pipe and flange.
**Socket Weld Flange**
- Suitable for small-diameter chemical processes, hydraulic, and steam distribution lines.
- Similar to a slip-on flange but with a counterbore that matches the pipe's bore.
- Allows unrestricted flow and can be inserted into the socket with a fillet weld at the hub.
**Blind Flange**
- Used to close the ends of piping systems.
- Has no bore.
- Provides access to sealed lines.
**Other Flanges Available:**
Orifice, Expander, Reducing, Lightweight, Studding Outlets, Long Weld Necks, Metric, Navy Drawings, Customer Drawings.
If you have any specific requests, feel free to contact us for detailed catalogues. Thank you.
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### Product Details from Ningbo HAGA Metal Products Co., Ltd
| Full Name | Flanges |
|----------|---------|
| Material | Stainless Steel 304, 304L, 316, 316L, Carbon Steel |
| Standard | ANSI, BS, DIN, EN1092-1, JIS |
| **ANSI Flanges** | |
| Dimension | ANSI B16.5, B14.47, B16.36, B16.48 |
| Material Spec. | ASTM A182, A351, DIN, ASTM A105, A216 WCB |
| Material Grades | F305, F304L, F316, F316L, CF8, CF8M, CF3M |
| | DIN1.4301, DIN1.4306, DIN1.4401, DIN1.4404 |
| | DIN1.4308, DIN1.4408, DIN1.4306, DIN1.4409 |
| | DIN1.0402, DIN1.0460, DIN1.0619 |
| Class | 150, 300, 400, 600, 900, 1500, 2500 |
| Flange Type | Weld Neck, Threaded, Slip-on, Lap Joint, Socket Weld, Blind |
| **BS Flanges** | |
| Dimension | BS4504 |
| PN | 2.4, 6, 10, 16, 25, 40 |
| Flange Type | Weld Neck, Threaded, Slip-on, Lap Joint, Socket Weld, Blind |
| **DIN Flanges** | |
| Description | 1) Blind Flange (DIN2527, Pressure: 6 - 100 bar) |
| | 2) Flat Flange for welding (Slip on): 6Bar DIN2573, 10Bar DIN2576, 16Bar DIN2502, 25/40Bar DIN2503 |
| | 3) Welding Neck Flange: 1/2.5Bar DIN2630, 6Bar DIN2631, 10Bar DIN2632, 16Bar DIN2633, 25Bar DIN2634, 40Bar DIN2635, 64Bar DIN2636, 100Bar DIN2637, 160Bar DIN2638, 250Bar DIN2628, 320Bar DIN2629, 400Bar DIN2627 |
| | 4) Lapped (lapped joint) flange, Plain collar: 6Bar DIN2641, 10Bar DIN2642 |
| | 5) Loose flange and ring for welding (slip-on flange and plain collar): 6Bar DIN2652, 10Bar DIN2653, 25Bar DIN2655, 40Bar DIN2656 |
| | 6) Loose flange and ring with neck for welding: 10Bar DIN2673 |
| | 7) Oval plain threaded flange: 6Bar DIN2558 |
| | 8) Oval plain, with neck threaded: 10/16 Bar DIN2561 |
| | 9) Thread flange with neck: 6Bar DIN2565, 10/16 DIN2566, 25/40Bar DIN2567, 64Bar DIN2568, 100Bar DIN2569 |
| | 10) Long neck welding flange: 10/25Bar DIN28115 |
| | 11) Hubbed slip-on flange for welding: 10Bar DIN86029, 16Bar DIN86030 |
| **EN1092-1 Flanges** | |
| Description | 1) Plate (Slip on) flange for welding: 6/10/16 /25/40/63/100 Bar |
| | 2) Loose plate flanges with weld-on plate collar: 6/10/16 /25/40/63 Bar |
| | 3) Loose plate flanges with weld-neck collar: 6/10/16 /25/40/63 Bar |
| | 4) Blank (Blind) Flange: 6/10/16 /25/40/63/100 Bar |
| | 5) Welding Neck Flange: 6/10/16 /25/40/63/100 Bar |
| | 6) Hubbed slip-on flange for welding: 6/10/16 /25/40/63/100 Bar |
| | 7) Hubbed threaded flanges: 16/40/63/100 Bar |
| | 8) Integral Flanges: 6/10/16 /25/40/63/100 Bar |
| | 9) Weld-on plate collars: 6/10/16 /25/40 Bar |
| | 10) Lapped pipe ends: 6/10/16 /25/40 Bar |
| | 11) Weld-Neck Collars: 6/10/16 /25/40 Bar |
| **JIS Flanges** | |
| Description | 2/5/10 /16/20/30/40/63 kg/cm² |
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