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Blind Flange (BL) Carbon Steel Forged Flange
**Product Details**
- **Model No.:** Blind Flange
- **Manufacturing Method:** Forging
- **Application:** Used for sealing or connecting pipe/tube lines
- **Trademark:** Lockheed
- **Transport Packaging:** Pallets
- **Specification:** DIN/ANSI
- **Origin:** China
- **HS Code:** 7307210000
**Flange Types and 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 internal diameter, ensuring smooth flow and reducing turbulence and erosion.
- Easy to radiograph and offers excellent stress distribution.
- **Slip-On Flange**
- Not typically used in high-stress applications due to a smaller hub and weld joint.
- Slides over the outside of the pipe.
- The inside of the flange is welded at the hub and the end of the pipe.
- **Lap Joint Flange**
- Used when bolt alignment or cleaning access is required.
- Similar to slip-on flanges when paired 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 seal the pipe and flange.
- **Socket Weld Flange**
- Suitable for small-diameter chemical, hydraulic, and steam distribution systems.
- Similar to slip-on flanges.
- The counterbore matches the pipe bore, allowing unrestricted flow.
- The counterbore from the hub side fits the pipe’s outer diameter, enabling insertion with a fillet weld at the hub.
- **Blind Flange**
- Used to close the ends of piping.
- Has no bore.
- Allows access to sealed lines.
- **Other Flanges:** Orifice, Expander, Reducing, Lightweight, Studding Outlets, Long Weld Necks, Metric, Navy Drawings, Customer Drawings.
**Material & Standards**
Ningbo HAGA Metal Products Co., Ltd. specializes in manufacturing flanges made from materials such as:
- **Stainless Steel:** 304, 304L, 316, 316L
- **Carbon Steel**
Our flanges comply with international standards including:
- **ANSI, BS, DIN, EN1092-1, JIS**
**ANSI Flanges**
- **Dimensions:** ANSI B16.5, B14.47, B16.36, B16.48
- **Material Specifications:** ASTM A182, A351, DIN, ASTM A105, A216 WCB
- **Material Grades:** F305, F304L, F316, F316L, CF8, CF8M, CF3M
- **DIN Grades:** 1.4301, 1.4306, 1.4401, 1.4404, 1.4308, 1.4408, 1.4306, 1.4409, 1.0402, 1.0460, 1.0619
- **Class:** 150, 300, 400, 600, 900, 1500, 2500
- **Flange Types:** Weld Neck, Threaded, Slip-on, Lap Joint, Socket Weld, Blind
**BS Flanges**
- **Dimension:** BS4504
- **PN Ratings:** 2.4, 6, 10, 16, 25, 40
- **Flange Types:** Weld Neck, Threaded, Slip-on, Lap Joint, Socket Weld, Blind
**DIN Flanges**
- **Description:** Includes Blind Flanges (DIN2527, 6–100 bar), Slip-on Flanges (DIN2573, 2503), Welding Neck Flanges (DIN2630–2638), Lapped Joint Flanges (DIN2641–2642), and many more.
**EN1092-1 Flanges**
- **Types:** Slip-on, Loose Plate, Blind, Welding Neck, Hubbed Slip-on, Threaded, Integral, Weld-on Collars, Lapped Pipe Ends, Weld-Neck Collars.
- **Pressure Ratings:** 6/10/16/25/40/63/100 Bar
**JIS Flanges**
- **Pressure Ratings:** 2/5/10/16/20/30/40/63 kg/cm²
**Contact Us**
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