The difference between push elbow and socket weld elbow

Ah Jian: Pushing elbows: At the end of the 80s, I came into contact with the process of pushing steel elbows by mechanical + mold inner tube + intermediate frequency heating method, but later it was probably that the thickness of the inner and outer side walls was not easy to control, and it was rarely applied in practice.

Socket weld elbows: Most of them are forged. In the project, the DN is less than or equal to 40 and the socket is used without special requirements.

Summary. A typical welded elbow is an elbow made from a straight section of pipe. It is suitable for making large-diameter pipe elbows.

Stamping elbows use sheet metal to punch out various parts of the elbow (most elbows are divided into two parts) and then weld them into shape. Suitable for elbows with larger diameters and radii. There are no marks on the appearance, and the stamping is stronger in strength.

A typical welded elbow is a closed rock source made of a section of straight pipe. It is suitable for making sedan large-diameter pipe elbows. Stamping elbows use sheet metal to punch out various parts of the elbow (most elbows are divided into two parts) and then weld them into shape.

Suitable for elbows with larger diameters and radii. There are no traces in front of the jujube in appearance, and the stamping is stronger in terms of strength.

The stamping elbow is a welding elbow that is pressed and formed, and the stamping welding row is upgraded to connect the elbow, which is a plate of the same material as the pipe, which is stamped into a half ring elbow with a stamping die, and then the two half keys and ring elbows are welded into pairs. Due to the different welding standards of various types of pipelines, it is usually a spot welding fixed semi-finished product in a group, and the on-site construction is welded according to the weld grade of the pipeline, so it is also called a two-half welding elbow.

Seamless elbows and straight seam elbows: 1Different uses:

Seamless is mainly used as a pipe or structural part to transport fluids, mainly in the machinery industry, while seamed elbows are mainly used in the construction industry, such as low-pressure fluids such as water, gas, compressed air, etc. But when it comes to pressure piping are used seamlessly. 2.

Different: Because the seamless production process is more complex, it is more expensive than the seamed elbow, and the seam is mainly made of steel plate (steel belt) secondary welding, which is cheap.

Hello, the radius of DN25 socket welding elbow and butt elbow is not necessarily the same. DN25 refers to the nominal diameter of the pipe is 25 mm, while the radius of the elbow refers to the radius of the curved part. The difference between socket welding elbow and butt elbow is that the connection method is different, socket welding elbow connects the pipe and elbow by socket welding, while butt elbow is connected by butt welding.

In practical applications, the radius of socket weld elbow and butt elbow can be selected according to the need. In general, the radius of the socket welding elbow is smaller than that of the butt elbow, because the connection of the socket welding elbow is tighter, and the strength and stability of the pipe noisy bend need to be considered. The butt elbow can be selected with a larger radius to reduce the resistance and pressure loss of the pipeline.

In addition to the radius, the angle of the elbow is also a factor to consider. Common elbow angles are 45 degrees, 90 degrees and 180 degrees, etc., and different angles are suitable for different pipe layouts and fluid transfer requirements. In short, when choosing an elbow, it is necessary to comprehensively consider factors such as pipe diameter, elbow radius and angle according to the actual situation to ensure the normal operation and safety of the pipeline.

Summary. Hello dear, happy to answer your <>

DN25 refers to the size of the pipe, while socket weld elbows and butt elbows are both types of pipe joints. The size of their radius depends on the specific product design and manufacturing criteria, not on the size of the pipe. Therefore, the radius size of the socket weld elbow and butt elbow of DN25 may not be the same, depending on its manufacturing standard and design.

If you need specific information, please check the product leaflet or consult the relevant manufacturer.

Is DN25 socket weld elbow and butt elbow have the same radius?

Hello dear, happy to answer your <>

DN25 refers to the size of the pipe, while socket weld elbows and butt elbows are both types of pipe joints. The size of their radius depends on the specific product design and manufacturing criteria, not on the size of the pipe. Therefore, the radius of the socket weld elbow and the butt elbow of DN25 may vary in width, depending on the manufacturing standard and design of the beam.

If you need specific information, please check the product brochure or consult the relevant manufacturer.

What is the socket weld elbow radius of DN25?

The radius size of the DN25 socket weld elbow depends on its manufacturing standard and design, so the exact radius size may vary greatly. In general, the radius of the welding elbow is usually times the pipe diameter, or it can be 1 or 2 times the pipe diameter of the pipe. Based on these estimates, the radius of the socket weld elbow for DN25 may be between 75 mm.

The specific radius size should be verified with the manual of the orange beard product or the relevant manufacturer.

The hot-pressed elbow is the stamping elbow, which is made of material heated and stamped with a special die, with a small diameter; The welding elbow is called "shrimp bend", which can be welded after cutting and cutting on the pipe or steel plate, and its size can be very large. The number of bends and the bending radius are determined by the maker. The smoothness of the stamping bend is good, while the welding bend is not very round, the bending radius of both is not large, generally about 1 times the diameter of the pipe, and the bending radius of the simmering bend is about 8 times the diameter of the pipe, and its smoothness is also the same as the stamping bend.

The socket is sleeved on the outside of the tube, and the insertion is put into the inner surface of the tube. That is, an elbow with one big end and one small end.

a.Hot push forming.

The hot push elbow forming process is a process that uses a special elbow pushing machine, a core mold and a heating device to make the blank set on the mold move forward under the push of the pushing machine, and is heated, expanded and bent in the movement. The deformation characteristics of the hot push elbow are to determine the diameter of the tube blank according to the law that the volume remains unchanged before and after the plastic deformation of the metal material, and the diameter of the tube blank used is smaller than the diameter of the elbow, and the deformation process of the blank is controlled by the mandrel mold, so that the metal flow that is compressed at the inner arc is compensated to other parts that are thinned due to the expansion, so as to obtain the elbow with uniform wall thickness. The hot push elbow forming process has the characteristics of beautiful appearance, uniform wall thickness and continuous operation, and is suitable for mass production, so it has become the main forming method of carbon steel and alloy steel elbows, and is also used in the forming of stainless steel elbows of certain specifications.

The heating methods of the forming process include medium frequency or high frequency induction heating (the heating ring can be multi-turn or single-turn), flame heating and reverberatory furnace heating, and the heating method is determined according to the requirements of the forming product and the energy situation.

b.Stamping and forming.

Stamping forming elbow is the earliest forming process applied to mass production of seamless elbows, at present, in the production of common specifications of elbows has been replaced by hot push method or other forming processes, but in some specifications of elbows due to the small number of production, the wall thickness is too thick or too thin. The product is still in use when it has special requirements. The punching of the elbow is made of a tube blank equal to the outer diameter of the elbow, which is pressed directly in the mold using a press.

Before stamping, the tube blank is placed on the lower die, the inner core and the end die are loaded into the tube blank, the upper die moves downward and begins to press, and the elbow is formed through the restraint of the outer die and the support of the inner die. Compared with the hot push process, the appearance quality of stamping and forming is not as good as the former; The outer arc of the stamping elbow is in a tensile state when it is formed, and there is no excess metal in other parts to compensate, so the wall thickness at the outer arc is about 10% thinner. However, due to the characteristics of being suitable for single-piece production and low cost, the stamping elbow process is mostly used for the manufacture of small batches and thick-walled elbows.

Stamping elbows are divided into two types: cold stamping and hot stamping, and cold stamping or hot stamping is usually selected according to the material properties and equipment capabilities. The forming process of cold extrusion elbow is to use a special elbow forming machine to put the tube blank into the outer die, and after the upper and lower molds are clamped, under the push of the push rod, the tube blank moves along the gap reserved by the inner mold and the outer mold to complete the forming process. The elbow manufactured by the cold extrusion process of the inner and outer molds has beautiful appearance, uniform wall thickness and small size deviation, so this process is mostly used for the forming of stainless steel elbows, especially thin-walled stainless steel elbows.

The internal and external molds used in this process require high precision; The requirements for the wall thickness deviation of the tube blank are also relatively harsh.

c.Other forming methods.

In addition to the above three commonly used forming processes, seamless elbow forming also uses the forming process of extruding the tube blank into the outer mold and then forming it through the tube blank through the ball. However, this process is relatively complex, troublesome to operate, and the forming quality is not as good as the aforementioned process, so it is rarely adopted.

Hope it helps.

Hello! It is that the manufacturing method is different, but most of the elbows on the market are pushed.

It is that the manufacturing method is different, but most of the elbows on the market are pushed.

The processing technology and applicable environment are different.