Features and structure shape of butt welding flange

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Butt welding flange is a kind of pipe fittings, which refers to the flange with neck and the transition of round pipe and butt welding with the pipe.

Butt welding flanges are not easy to deform, have good sealing, and are widely used. They have corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition. The distance between the welding port and the joint surface is large, and the joint surface is protected from welding temperature deformation. The horn-shaped body structure is suitable for pipelines with large fluctuations in pressure or temperature or high temperature, high pressure and low temperature pipelines. It is generally used for the connection of pipelines and valves with a PN greater than 2.5MPa; it is also used for transporting expensive, flammable and explosive On the pipeline of the medium.

Production material

WCB (carbon steel), LCB (low temperature carbon steel), LC3 (3.5% nickel steel), WC5 (1.25% chromium 0.5% molybdenum steel), WC9 (2.25% chromium), C5 (5% chromium% molybdenum), C12 ( 9% chromium 1% molybdenum), CA6NM (4 (12% chromium steel), CA15(4) (12% chromium), CF8M (316 stainless steel), CF8C (347 stainless steel), CF8 (304 stainless steel), CF3 (304L stainless steel) ), CF3M (316L stainless steel), CN7M (alloy steel), M35-1 (Monel), N7M (Haast Nickel Alloy B), CW6M (Hasta Nickel Alloy C), CY40 (Inconel)

Connection form : One-sided welding, double-sided nut connection.
Product features : Beautiful appearance, smooth surface, acid and alkali resistance, anti-corrosion, and strong texture performance.
Production process : The material is cut in the sub-oxygen furnace, the whole is forged or the finished product is forged and cut.
Processing method: High-precision CNC lathe turning, CNC radial drilling and drilling.

Product parameter
(1) The diameter of the center circle of the bolt hole: 50mm—-2130mm
(2) Bolt hole diameter: 11mm-30mm
(3) Flange thickness: 12mm-58mm
(4) Tube outer diameter: A(17.2-2032MM) B(14-2020MM)
(5) Flange inner diameter: A (18-2036MM) B (15-2024MM)
(6) Theoretical weight of flange: 0.36kg–234.6kg (DN1800)

Decho is a professional supplier on flanges , if you need any for your project , pls contact us by email [email protected]

What are the connection methods of wear-resistant ceramic pipes?

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Wear-resistant ceramic pipes are widely used in the industrial field, especially in high-wear working environments, such as power plants, cement plants, mines and other enterprises. Wear-resistant ceramic pipes reflect the incomparable advantages of other products.

Wear-resistant ceramic pipe connection method

1. Fixed flange connection

Fixed flange connection means that the flange is directly welded to the pipeline and connected by bolts. However, once the flange is welded, the bolt hole cannot be adjusted, so some drawings will mark the angle of the bolt hole.

2. Live flange connection

The live flange welding head is turned up, so that the bolt hole can be adjusted, and there is no need to correct the position of the bolt hole when connecting with another flange.

3. Welding method

Glue is needed to fix wear-resistant ceramics, but the glue cannot withstand the high temperature during welding. Because the temperature of steel pipe welding is very high, it can be hundreds of degrees in an instant, and the heat transfer speed of steel is very fast, so the welding place needs to keep a certain distance from the ceramic. Leave a distance of at least 2 cm, which is generally called a 2 cm welding end.

Precautions for installation of wear-resistant ceramic pipes

1. In the process of handling and installation, wear-resistant ceramic pipes should be handled with care to avoid serious collisions. In particular, avoid direct contact with or impact on end ceramics by metal equipment.
2. When the wear-resistant ceramic pipe needs to be cut during the installation process, it can be cut with silicon carbide grinding wheel or plasma cutting machine, and gas cutting is not allowed.
3. When the wear-resistant ceramic pipeline is installed, the center line of the pipeline and the pipeline should be aligned to ensure that the two ends are connected accurately, and the amount of misalignment of the two ends should be controlled within 1.0mm.
4. When the flexible pipe socket is used to connect and install the pipeline, the double-end insertion length of the flexible pipe sleeve is adjusted symmetrically. Since the coefficient of thermal expansion of the wear-resistant ceramic pipe is 1/2 of that of the steel pipe, the expansion gap can be reduced by 3-5mm.
5. When using flange connection, the flange end surface must be flush with the wear-resistant ceramic pipe end surface to ensure the reliability of the connection method.

Decho is a professional supplier on wear resistant ceramic pipes , if you need any , pls contact us by email : [email protected]