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Pipes Fittings

Boiler Pipe Material Specification and Application

Boiler steel pipes includes medium pressure boiler pipe and high pressure boiler pipe, it is often manufactured in seamless procedures, welded steel pipe is not applicable.

It has been widely used at heat exchanger pipe and tubing services, tube exchanger bundle, high pressure boiler, economizer, super heater, petrochemical industry pipes, etc.

Medium and high pressure boiler pipe differences

The operation temperature of general boiler pipe is lower than 450℃. The medium pressure boiler pipeline mainly adopts hot rolling process or cold drawing process.

Advantages and Applications of Boiler pipe Fittings

Corrosive environments put a great deal of pressure on materials like stainless steel, but they may be resilient enough to help extend the life of a variety of projects. A variety of structural applications can be accomplished with the internal radius of these fittings. Its corrosion-resistant properties make it suitable for exposure to corrosive environments such as detergents, chemicals, petrochemicals, freshwater, and saline water. Steel beams are used extensively as structural elements in architectural construction. A wide diversity of products, from large-scale building structures to automobiles, use stainless steel fittings to provide support.

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Corrosive environments put a great deal of pressure on materials like stainless steel, but they may be resilient enough to help extend the life of a variety of projects. A variety of structural applications can be accomplished with the internal radius of these fittings. Its corrosion-resistant properties make it suitable for exposure to corrosive environments such as detergents, chemicals, petrochemicals, freshwater, and saline water. Steel beams are used extensively as structural elements in architectural construction. A wide diversity of products, from large-scale building structures to automobiles, use stainless steel fittings to provide support.

Steel Flange Applications

Steel Pipe Flange is a kind of pipe fitting to connect two pipes, or pipes and valves, or the equipment. The holes on the flange connected by the steel studs, then use the gasket in the middle for sealing between two flanges. So by the different application and style, there are slip on flange, blind flange, socket weld flange, threaded flange, weld neck flange and reducing flange.

Octal offers steel pipe flange with various kinds and applicable to different industrial areas, Oil & Gas transportation, Chemical Plant, Power Station, Water Treatment, Refining etc.

Flange types

According to the connection way between the pipe and flange, the flange can be divided into the following five basic types:

Slip-on Flange

The slip on flange welding also simplified as SO flange. It is used by inserting the pipe into the inner hole of flange, as the flange inner diameter is little bigger than the pipe’s OD, the parts could be connected by lap welding at the top and bottom of the flange. Slip on steel pipe flange is normally with raised face (RF) or flat face (FF), and also available in TG and MFM.

Weld Neck Flange

Weld neck flange (WN flange) usually has two kinds of designs. High-hub flange and tapered-hub flange, former one is the regular type and used in connecting pipelines. The neck of welding neck flange can be directly welded to the pipe end. WN flange has the advantage of convenient construction, high strength and good sealing performances. It is also widely used in different pressure pipelines.

Threaded Flange

Threaded flange is the flange with threads in it’s inner surface, as to connect the threaded pipe. The advantage of this connection type is non-welding, so it is very convenient to install, and easy to repair. Threaded flange could be made of alloy steel, which has higher strength but bad welding performances. On the other hand, it could not used in extreme conditions as the temperature mroe than 260 ℃ or lower than -45℃, to avoid leakage.

Socket Weld Flange

Socket weld flange (SW flange) is similar to the slip on flange, but the different part is is socket weld flange one side welded with the steel pipe, and the other side is connected with studs. Generally SW flange is used for small diameter pipes.

Lap Joint Pipe Flange

The lap joint pipe flange is that set the flange on the pipe end by using steel ring and flanging. The flange could be moved at the end of the pipe. Steel ring or flanging is the sealing surface, with flange to press them together. Because of the steel ring or the flanging block, the lap joint flange will not contact with the liquid. So it is applicable to corrosion resistant pipelines.

Blind Flange

Blind flange is like a solid disk without whole in the middle, only with mounting holes (for connecting purposes) functioned to block off the pipelines to stop the flows.