LR and SR refer to the centerline radius of the elbow. LR stands for a long radius, and SR stands for a short radius. A long-radius 45-degree elbow has a larger centerline radius than a short-radius 45-degree elbow. The long-radius elbow provides less frictional resistance to the flow of fluids and gases and is therefore used more commonly than the

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The thickness of a 45-degree elbow depends on the size and material of the pipe. Generally, the thickness of a 45-degree elbow is the same as the thickness of the pipe it is connecting to. It is essential to consult the manufacturer’s specifications for exact measurements.

A 45 degree bend is used in piping systems to change the direction of the flow of liquids or gases. It is often used in HVAC systems, plumbing, and industrial applications. A 45 degree bend is useful when a gradual change in direction is needed to prevent turbulence or to fit the pipe around obstacles.

The main difference between a 45 degree and 90 degree elbow is the angle of the bend. A 45 degree elbow allows for a gradual change in direction, while a 90 degree elbow provides a sharper turn. A 45 degree elbow is used when a more gradual turn is needed, while a 90 degree elbow is used when a sharper

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A 45-degree elbow is a type of pipe fitting that allows you to change the direction of the piping by 45 degrees. It is commonly used in plumbing, HVAC, and industrial applications.

Buttweld fittings are made by welding two pieces of pipe or fitting together, while forged fittings are made by forging a solid piece of metal into the desired shape. Buttweld fittings are used for larger pipe sizes and high-pressure applications, while forged fittings are used for smaller pipe sizes and lower-pressure applications.

Buttweld fittings are used in various applications such as pipelines, plumbing, and HVAC systems. They are used to connect pipes of different sizes, change the direction of flow, and reduce or increase the flow rate of fluids.

The three types of fittings are Buttweld, Socket Weld, and Threaded fittings.

The two types of welded joints are butt joint and lap joint.

ASME B16.9 is a standard that specifies the dimensions and tolerances of Buttweld fittings. It also provides guidelines for the manufacturing, testing, and marking of Buttweld fittings.