Seamless Carbon Steel 180 Degree Welded Elbow 1.5 Times The Length Radius Stamping Elbow 180 U Bend

Φ 22- Φ219 Seamless Carbon Steel 180 Degree Welded Elbow 1.5 Times The Length Radius Stamping Elbow 180°U Bend

Push hot forming
Hot push elbow forming process is the use of special elbow push machine, core die and heating device, so that the billet set on the mold in the push of the machine to move forward, in the movement of heating, expanding and bending forming process. Hot push bend deformation characteristics are based on volume before and after plastic deformation rule of metal materials determine the pipe diameter, pipe diameter bend diameter, through the core module and control the deformation of the process, make the inner arc compressed metal flow, the compensation to other parts of the thinned by hole diameter, wall thickness uniform Angle is obtained.
Hot push elbow forming process has the characteristics of beautiful appearance, uniform wall thickness and continuous operation, suitable for mass production, so it has become the main forming method of carbon steel, alloy steel elbow, and also used in the forming of some specifications of stainless steel elbow.
The heating method of forming process has medium frequency or high frequency induction heating (heating ring can be multiple or single ring), flame heating and reflector heating, which heating method depends on the requirements of forming products and energy conditions.
stamping
Stamping elbow is the earliest forming technology used in mass production of seamless elbow. It has been replaced by hot push method or other forming technology in the production of common specifications of elbow. However, in some specifications of elbow, the production quantity is small, the wall thickness is too thick or too thin.
The product is still in use when it has special requirements. Elbow stamping is formed by using the tube blank equal to the outer diameter of the elbow, which is directly pressed by the press in the mold.
Before stamping, the tube blank is placed on the lower die, and the inner core and end die are loaded into the tube blank. The upper die moves down and begins to press, and the elbow is formed by the constraint of the outer die and the support of the inner die.
Compared with the hot push process, the appearance quality of stamping is inferior to the former. When the stamping elbow is formed, the outer arc is in a stretch state, and there is no excess metal compensation in other parts, so the wall thickness at the outer arc is reduced about 10%. However, due to the characteristics of being suitable for single piece production and low cost, stamping elbow technology is mostly used in the manufacture of small batch and thick wall elbow.
Stamping elbow is divided into cold stamping and hot stamping, usually according to the material properties and equipment capacity of the choice of cold stamping or hot stamping.
The forming process of cold extrusion elbow is to use a special elbow forming machine, put the tube blank into the outer mold, after the upper and lower mold, under the push rod, the tube blank along the inner mold and the outer mold reserved clearance movement and complete the forming process.
Using internal and external die cold extrusion process manufacturing elbow beautiful appearance, uniform wall thickness, small size deviation, so for stainless steel elbow, especially thin-walled stainless steel elbow forming more use this process manufacturing. The internal and external mold used in this process requires high precision; The requirement of wall thickness deviation is also very strict.
Medium plate welded
Use the middle plate to make one half of the elbow section with a press and then weld the two sections together. This process is generally used to make elbow more than DN700.
Other forming methods
In addition to the three commonly used forming processes, seamless elbow forming also uses the tube blank extrusion to the outer die, and then through the tube blank ball shaping forming process. However, this process is relatively complex, difficult to operate, and the forming quality is not as good as the foregoing process, so it is seldom used

TOBO GROUP sales head offce in Shanghai.

We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicians.

We have five branch factories which can supply the best quality pipes, tubes, fittings flanges and related accessories. Now, it owns a number of advanced pipe production equipments, metal, forging, machining, cold forming, hot extrusion, such as heat treatment process, producing 60, 000 tons of pipe fittings. Company with a variety of detection devices, such as nondestructive testing, chemical analysis, metallographic examination, physical experiments. The technical is very strength, our main products contain fittingsforged socket welding fittings and threaded fittings, pipe weld and the materials of the products contain stainless steel ,duplex-stainless steel alloy steel.

In addition, we are authorized by more than 120 top-class mills from South Korea,Japan and China like JFE,SUMITOMO,POSCO,BAOSTEEL, TISCO,LISCO,.TPCO,HENGYANG VALIN and so on .

Our main products as follows:

• Stainless steel pipe & tube

(seamless pipe / welded pipe / square pipe / rectangular tube,duplex stainless / inconel tube)

• Carbon / alloy steel pipe & tube

(seamless pipe / ERW / SSAW / LSAW / UOE / hollow section pipe / Galvanized Pipe)

• Tubing and casting

(line pipe,water pipeline,gas pipeline,oil pipeline)

• Special steel tube

(copper tube/titanium tube/aluminium tube/nickel alloy )

• steel bar

(round bar/angle steel /flat steel/channel steel/steel wire)

• Pipe Fittings

(eblows, equal / reducing tees, concentric/eccentric reducers, caps, crosses, bends, dish end/end cup, stub ends, unions, couplings / hex couplings, swage nipples , nipples, hex. plug, sockolet, weldolet, thredolet, etc)

• Flange

(DIN flange/ AISI flange/blind flange/welding flange/stainless flange/slip on flange)

• steel sheet / coil

(stainless steel/carbon steel/alloy steel/galvanized steel/aluminium )

• Valve

(ball valve/gate valve/butterfly valve/globe valve/swing check valve/ check valve)

In order to comply with the global modernization services development trends and eliminating the varieties distress of the global enterprise‘s purchase in the consumables.. We coordinate the pressure pipe manufacturer which with the scale of production,quality control and high cost performance (has passed ISO 9001 quality series attestation, ccs, DNV,PED/97/23/EC,AD2000-WO,special equipment manufacturing license,ASME-SA182.through a variety of effective assort mechanism to make up the shortage of supply and Post-processing of VAT enterprise, and to supply high quality pipe fittings, because of the superior quality and good service, we have established long term business cooperation with more than 60 countries and areas,which covers Europe, Africa, South America, North America, Middle East, Taiwan and South East Asia and so on.

With many years effort and support from our valuable customers, these products have obtained a big market share in the world.

Our business principle is "Superior quality, Competitive price, Timely delivery and Considerate service " Standing to the principle of “Enterprises focus on the core business”, TOBO will actively promotes the globalization of business strategy approach, using advanced supply chain management technology to service for clients with higher quality and more competitiveness ‘ s products. At the same time, we sincerely reply your inquiry, honesty waiting for your visiting and wish to have cooperation with you at the any time. We welcome all the customers to contact us for more information. We assure you, with our technical knowledge and experience, our company will be one of your Stable, Continuate business parters in China.

info@tobo-group.com