Beveling of pipe or tubing is most commonly used to prepare the ends for welding. It can also be used for debarring the cut ends for safety and aesthetic reasons.
We can apply any type of Bevel to any degree required. Beveling can applied to the face of any size or diameter of pipe.
Other angles and special forms such as J-Bevels can also be produced on the ends of pipe or tube using automatic beveling machines.
The Guide to Beveling Pipe
A standard pipe bevel angle for welding is 37.5 degrees. Other angles and special forms such as J-Bevels can also be produced on the ends of pipe or tube using automatic beveling machines.
Subtract the pipe’s wall thickness from the pipe’s outside diameter. For example, if you had a pipe with a diameter of six inches and a wall thickness of two inches, you would subtract two from six to get four.
What pipe beveling method is right for your application? How are weld ready bevels created? What kinds of bevels can be produced by hand? With a machine? In our newest download, the Guide to Beveling Pipe, we cover all the basics of pipe beveling including:
- Types of bevels
- Beveling methods
- Choosing the right method
When welding two pieces of pipe together the ends of the pipe must be properly prepared to obtain the best possible weld joint. The pipe or tube is typically beveled on the ends to facilitate the joining of the two pieces by forming a “V” between them.
This “V” can have different angles, forms, and other characteristics depending on the size of the pipe, the wall thickness, material grade, and method of welding.
The most common weld bevel is a straight 37-1/2 degree bevel measured off of the face of the pipe. This forms a 75 degree angle between the two pieces of pipe and there is normally a “land” or small flat that is to eliminate the thin or “feather machined or ground on the end edge.”
The cheapest, dirtiest, and least safe method is to use a hand grinder to grind the bevel on the pipe. This is time consuming and requires a skilled operator to produce the bevel accurately.
Welding Bevel acc.to ASME / ANSI B16.9 and ASME / ANSI B16.28
Our in-hourse R&D team developed bevel ends equipment are good using in thickness 2mm to 20mm pipe fittings, guarantee high efficiency and high quality.
- I—type butt joint, also called square butt joint, is a relatively simple joint method for pipes of 1 to 6 mm in thickness. Strictly speaking, it is not a beveled end joint, for it only requires parallel matching the edges of two pieces together without certain angles. It is easy and economic to process, but is not recommended for pipes of thick walls. As for thicker wall pipes, the angle of the bevel ends needs full consideration, trying to use the least filler metal material to provide the desired welding soundness.
- Single—V beveled end, is the most widely-used butt joint type in pipeline application. It suits pipes with the thickness of 3 to 26 mm. The beveled angle should be approximately 40 to 60°. Single—V beveled end is processed by a beveling machine. Comparatively speaking, it is more costly and needs more filler material than the I—type butt joint, but the joint is much stronger than the square joint. The disadvantage of single-V beveled end is its easy subjection to angular deformation.
- Double—V beveled end, also called X—beveled end, is developed on the basis of single—V beveled end. It needs double-side welding, so the material needs to be turned over after welded one side and the preparation time is longer than the single-V beveled end. It can be used for pipes of thickness 12 to 60mm. For pipes of same thickness, a double—V beveled end requires less filler metal material, because there are two narrower V-joints compared to one wider single—V beveled end.
- Single-U beveled end is a one-side welding joint. It requires less filler metal material than double—V beveled end and is less subjective to deformation. However, due to the radian shape, it is more difficult to process than the former methods.
Beveled angle refers to the angle between the two beveled surfaces. Beveled face angle, normally used for single-U type, refers to the angle between the beveled surface and the vertical line to the pipe itself. The root opening refers to the gap between the roots of both pieces before welding, to ensure the roots get complete welding. The root radius for single-U beveled end is to increase the transverse space between the roots, making the welding reach the bottom of the root.
Ends of Pipes
For the ends of pipes are 3 standard versions available.
- Plain Ends (PE)
- Threaded Ends (TE)
- Beveled Ends (BE)
The TE implementation speaks for itself, this performance will generally used for small diameters pipe systems, and the connections will be made with threaded flanges and threaded fittings.
Root faceThe BE implementation is applied to all diameters of buttweld flanges or buttweld fittings, and will be directly welded (with a small gap 3-4 mm) to each other or to the pipe. Ends are mostly be beveled to angle 30° (+ 5° / -0°) with a root face of 1.6 mm (± 0.8 mm).