How to Bend Pipe

You can bend pipe and tubing in one of several methods, depending on what you plan to use the bent pipe or tube for. The problem in bending pipe is figuring out where and how much to bend the pipe. While many bending tools come with a set of instructions for figuring out such things as bend allowances and bend deductions, they are often written in a complex manner and assume a knowledge of mathematics that intimidates many users. While it’s not possible to completely eliminate the math, it is possible to plan how to bend a piece of pipe in such a way that figuring the bending angle is simplified and so that the only math needed is simple arithmetic. The method described below is not simple, but with practice, you can master it.

Selecting a Bending Tool

Choose the right bending tools for your needs. There are 6 main bending methods. Each is best suited to a particular type of pipe.

• Ram style bending, also called incremental bending, is usually used for putting large bends in light-gauge metal, such as electrical conduit. In this method, the pipe is held down at 2 external points and the ram pushes on the pipe at its central axis to bend it. Bends tend to deform into an oval shape at both the inside and outside of the bend.
• Rotary draw bending is used to bend pipe for use as handrails or ornamental iron, as well as car chassis, roll cages, and trailer frames, as well as heavier conduit. Rotary draw bending uses 2 dies: a stationary counter-bending die and a fixed radius die to form the bend. It is used when the pipe needs to have a good finish and constant diameter throughout its length.
• Mandrel bending is used to make stock and custom exhaust pipes, dairy tubing, and heat exchanger tubing. In addition to the dies used in rotary draw bending, mandrel bending uses a flexible support that bends with the pipe or tubing to make sure the pipe interior isn’t deformed.
• Induction bending heats the area to be bent with an electric coil, and then the pipe or tube is bent with dies similar to those used in rotary draw bending. The metal is immediately cooled with water to temper it. It produces tighter bends than straight rotary draw bending.
• Roll bending, also called cold bending, is used whenever large bends are necessary in the pipe or tubing, such as in awning supports, barbecue grill frames, or drum rolls, as well as in most construction work. Roll benders use 3 rolls on individual shafts to roll the pipe through as the top roller pushes down to bend the pipe. (Because the rolls are arranged in a triangle, this method is sometimes called pyramid bending.)
• Hot bending, in contrast, is used considerably in repair work. The metal is heated at the place where it is to be bent to soften it.
  

Making a Right Angle Bend

Bend a test pipe at a 90-degree angle. Not only will this familiarize you with how much force you need to apply to operate your bender, but this pipe will serve as a reference for future bends.

• To check the angle of your pipe, lay it against a carpenter’s square with the outer bend facing the corner of the square. Both ends of the pipe should just touch the square’s sides and run parallel to them.

Find the place where the bend in the pipe starts. You should see or feel a small flat spot or distortion at the place where the bend starts and where it ends.

Mark the ends of the bend with a permanent marker. Draw the line completely around the pipe.

 

Lay the pipe against the square again to find the length of the pipe in the bend. 

Note the place on each side of the square where the pipe’s markings touch. These should be the same distance from the inside corner of the square. Add these lengths together.

• If the markings on each end of the pipe bend touch the square at 6 inches (15 cm) from the inside corner of the square, the total length of the bent section of the pipe is 12 inches (30 cm).

Find the place on your bending die where the bend begins. Place the bent tube back in your bender with the die used to bend it and note where on the die the mark on the pipe lines up. Mark this place with a dot of paint or by notching the metal with a file.

• If you have more than one die (for different diameters of pipe), make a test bend for each die, as each diameter will require a different amount of metal to make a 90-degree bend.
• Once you know how much pipe is needed to form the bend, you can calculate how long a piece of pipe you need by adding this figure (called the bend deduction) to the vertical and horizontal l

Pipe bending, Bend pipe

Our induction pipe bending services are ideal for the the general and process pipework industries, offshore oil and gas production sectors and the power generation. We provide an exceptional range of post-bend heat treatment solutions.

The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements, so it is commonly that bends dimension according to customer design. Usually, the bends consist of 3D,5D,7D even 12D series.carbon steel bend.

Our extensive induction pipe bending work includes API standard facilities, ASNT / PCN approved company, primer and fusion bonded epoxy, passivation, and destructive and non destructive chemical testing.

We can also transport and deliver any items across the China and internationally. Our packing and transport services cover sea, air and road and our deliveries are inspected through third party-certified agencies.

Pipe bend, Bend pipe, Pipe bending, ANSI, ISO, JIS and DIN Standards, Measures 1/2 to 56 Inches.

The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design. usually,the bends consist of 3D,5D,7D even 12D series.carbon steel bend.

180 degree bending	Butt-welded bend
Small size bending	7D Pipe bending fittings
+ ASTM API 5L Gr.B bends	+ Bending Service

Key Specifications/Special Features:

Bending radius(R): R=3D, 4D, 5D, 6D, 7D, 8D, 9D, 10D
Bending angle (θ):15°, 30°, 45°, 60°, 90°, 135°, 180°
Straight Length (L): The length between two ends general from 300mm-1500mm
Outer diamete(D): D≤1800mm
Wall thickness(T): T≤120mm

Type of Butt Weld Pipe Fittings

Pipe Fittings are applied to connect two pipe ends together, to change direction or size of the pipes. There are many different types and shapes on the market.

We manufacture finest quality of butt weld pipe fittings to meet diverse material specification. Our steel butt weld pipe fittings are extremely durable and are available in various shape such as bent,triangular, rectangular etc. Butt weld pipe fittings are ideal multiple connection of pipes and to prevent fluid leakage. Different types of fittings can minimize potential fluid handling system and enhances their over all performance.

There are different parameters to be considered before purchasing and that is the size of the pipe fittings in diameter, thickness of the wall to be according to the pressure in the pipes, materials, shape and many others.

Pipe elbows  Steel elbow is used to be installed between two lengths of pipe or tube allowing a change of direction,usually these carbon steel elbows distinguished by connection ends. + Long radius + Short radius

Pipe bending Pipe bend can be made of variety materials,like carbon steel,alloy steel,stainless steel,low temperature steel or high performance steel,etc. + ASTM API 5L Gr.B bends  + Bending Service

Pipe Tees We can provide seamless tube tees and welding tube tees, which can also be divided into straight tees and reducing tees.Usually, the pipe tees have the same inlet and oulet sizes. + Reducing tee  + Equal tees

Pipe cross A pipe fitting, having four openings in the same place, at right angles to each other. A pipe cross is a kind of pipe fitting. It is used in the place where four pipes meet together. The pipe cross may have one inlet and three outlets, or there inlets and one outlet.

End caps End Cap, Carbon Steel cap, Stainless Steel Caps, ANSI, ISO, JIS and DIN Standards, Measures 1/2 to 56 Inches. Based on different materials, pipe caps include carbon steel cap, stainless steel cap, and alloy steel cap etc.

Pipe reducer Pipe reducer are tube fittings that are widely used in a number of industries in order to providing greatest connection flexibility in connecting fractional tubes in various installations.

Stub end Stub Ends are fittings used in place of welded flanges where rotating back up flanges are desired. They are also called Lap Joints and Vanstone Flared Laps. A rotating back up flange seats itself against the back surface of the Stub End.

Coupling Fittings Coupling fittings are used for fluid conduits in which each end portion of two tubes to be connected is provided with a swaged-on adapter carrying the necessary means to connect or disconnect the tubes without disturbing the swaged-on adapter.