When a piping joint needs to be disbanded, flanges are used. These are largely to use on equipment, valves, and specialty items. A pipe flange use bolted connections and gaskets to connect piping and components of a piping system. Breakout flanges are offered at predetermined intervals in certain pipelines where maintenance is a regular occurrence. The flanges, gaskets, and bolting come together to make a flanged joint, as it is made up of three separate but interrelated components. To achieve a leak-proof joint, special controls are required in the selection and application of all of these elements.
Weld neck flanges, slip on flanges, blind flanges, socket weld flanges, threaded flanges, and lap joint flanges are among the most commonly used flanges. This type of pipe flange connection facilitates dismantling and detachment for repairs and routine maintenance. ANSI B16.5 / ASME B16.5 is the most common specification for carbon steel and stainless steel flanges.
Flanges made of metal are widely used in industrial, commercial, and institutional settings. Steel pipe flanges come in a wide range of styles and pressure ratings. While Metal flanges are rated from 150 to 2500 pounds per square inch. Certain flanges, such as weld neck flanges and socket weld flanges, involve specifying the pipe timeline in addition to the pressure class. This ensures that now the pipe bore fits the weld neck or socket weld flange bore. Some pipe flanges are listed below, and they can also be used in industrial piping systems.
Types of pipe flange include:
Weld neck flanges: –
These flanges are butt-welded to the pipe’s end, likely to result in a flange that can withstand high temperatures and pressures.
Threaded flange: –
It has an internal thread through which a threaded pipe is screwed. This is easily installed, but it is not suitable for high pressure or temperature.
Socket-welded flanges: –
A plain hole with a shoulder at the bottom characterizes these socket welded flanges. The pipe is implanted into the hole and welded into place with a fillet weld along the outside to butt against the shoulder. This is used for low-pressure pipes with small diameters.
Slip-on flanges: –
There seems to be a plain hole on these flanges as well, however, there is no shoulder. Both side of flanges fillet welds are used.
Lapped flanges: –
There are two parts to the flanges: a stubend and a backing flange. The pipe’s end is butt-welded to the subend, which has a small flange with no holes. The backing flange slides over the shaft and has holes for bolting to another flange. This design allows for disassembly in tight spaces.
Blind flanges: –
Blind flanges are a type of blanking plate that is bolted to another pipe flange in order to isolate or terminate a section of piping. Before you select any flanges for your Industrial Piping System always remember particular factors that you need to focus on. Given below are some of the highlighted factors to make note on.
Factors to consider when choosing flanges for your Industrial Piping System: –
Type Of Flanges
Flanges for industrial use come in a variety of shapes and sizes. You must choose a flange design that is compatible with your piping systems with care. The following are some common types of flanges found in the petrochemical industry:
- Lap joint flanges.
- Blind flanges.
- Socket weld flange.
- Welding neck flanges.
- Slip-on flanges.
Material Of Flanges
The most common type of pipe flange on the market is forged carbon steel pipe flanges. Flanges made of stainless steel, aluminum, cast iron, and bronze are available as well. Flanges made of specialty metals like chrome-moly, Inconel, and Monel are also available. The material used is determined by the industrial application as well as the piping systems. This ensures that they will be strong and durable in the long run. In most cases, however, the flange is made of the same material as the pipes.
Flanges Size
You may need to verify your flange size and dimensions for a proper fit. To ensure an ideal size, pay attention to how the flange comes into contact with the gaskets and pipes. The following are some standard dimension considerations:
- Outside diameter
- Nominal bore size
- Inner diameter
- Bolt circle diameter
- Thickness
- Pipe size
- These dimensional factors may come in handy when updating, maintaining, or updating piping systems.
Classification Of Flanges
All flanges are categorized by ASME or ASTM standards into one of several categories. The characteristics of a particular flange type will have a significant impact on how it performs in a variety of industrial settings. Steel pipes come in a wide range of styles and pressure ratings. Metal flanges are rated from 150 to 2500 pounds per square inch. The following are some of the most common classifications used in the petrochemical industry:
- 150
- 300
- 600
- 900
- 1500
- 2500
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