ASTM A234 WPB Stainless Steel 90 Degree Elbow SCH 80 Elbow 20inch

ASTM A234 WPB CS LR ELBOW 90 Degree, Casting, 20 Inch, SCH 80 Carbon Steel Elbow

Carbon steel elbow is a kind of metal pipe fitting which changes the direction of pipe on carbon steel pipe. The connection mode includes screw thread and welding. According to the angle, there are 45 ° and 90 ° 180 ° three most commonly used, in addition, according to the needs of the project, it also includes 60 ° and other abnormal angle elbows.

The advantages of carbon steel elbow manufacturing process are as follows:

(1) It is not necessary to use tube blank as raw material, which can save the cost of pipe making equipment and die, and can obtain any large diameter carbon steel elbow with relatively thin wall thickness.

(2) The blank is flat plate or developable curved surface, so the blanking is simple, the accuracy is easy to ensure, and the assembly and welding are convenient.

(3) Due to the above two reasons, the manufacturing cycle can be shortened and the production cost can be greatly reduced. Because no special equipment is needed, it is especially suitable for processing large carbon steel elbow on site.

(4) Carbon steel elbow is suitable for pipeline series of petroleum, natural gas, chemical industry, hydropower, construction and boiler industries.

Introduction
Elbow is a kind of pipe fittings commonly used in plumbing installation, which is used to connect at the bend of pipe and to change the direction of pipe.
Other names :90 elbow, right angle bend, love bend, punching elbow, pressing elbow, mechanism elbow, welding elbow, etc.
Purpose: To connect two pipes with the same nominal diameter or different diameter, so that the be turned 90,45,180 and various degrees.
The bending radius is less than 1.5 times of the diameter of the pipe, and 1.5 times of the diameter of the pipe belongs to the elbow.

Process flow
Seamless elbow: elbow is a pipe fitting used at the bend of a pipe. The largest proportion of all pipe fittings used in the pipeline system is about 80. Usually, different forming processes are selected for bends with different materials or wall thickness. The seamless elbow forming process used by the manufacturer is hot push, stamping, extrusion and so on.
Folding Thermal Push
The forming process of hot-push elbow is the process of using special elbow pushing machine, core die and heating device to make the blank set on the die move forward under the push of the pushing machine, and be heated, expanded and bent in motion. The deformation characteristic of hot push elbow is to determine the diameter of pipe billet according to the law of constant volume before and after plastic deformation of metal material. The diameter of pipe billet is smaller than the diameter of elbow. Compensate to other parts of the inner arc thinning due to diameter expansion, thus obtaining a uniform wall thickness elbow.
The hot-push elbow forming process has the characteristics of beautiful appearance, uniform wall thickness and continuous operation, which is suitable for mass production, so it has become the main forming method of carbon steel and alloy steel elbows, and has also been applied in the forming of stainless steel elbows of some specifications.
The heating mode of forming process includes intermediate frequency or high frequency induction heating (heating ring can be multi-ring or single ring), flame heating and reflecting furnace heating. The heating mode depends on the requirements of forming product and energy situation.

Stamping forming
stamping forming elbow is the earliest forming process used in batch production of seamless elbow. it has been replaced by hot push method or other forming process in the production of elbow of common specifications, but in some specifications of elbow due to less production quantity, too thick wall thickness or too thin.
The product is still in use when it has special requirements. The punching forming of the elbow adopts the pipe billet equal to the outer diameter of the elbow, and the press is used to press the die directly.
Before stamping, the tube billet is placed on the lower die, the inner core and the end die are loaded into the tube billet, 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 forming is not as good as that of the former, and the outer arc of stamping elbow is in the tensile state when forming, and there is no extra metal in other parts to compensate, so the wall thickness at the outer arc is about 10% thinner. But because it is suitable for single piece production and low cost, stamping elbow process is mostly used in the manufacture of small batch and thick wall elbow.
Stamping elbows are divided into cold stamping and hot stamping, usually according to the material properties and equipment capacity to choose cold stamping or hot stamping.
The forming process of cold extrusion elbow is to use a special elbow forming machine to put the tube billet into the outer die. After the upper and lower die is molded, the tube billet moves along the gap reserved for the inner die and the outer die under the push rod.
The elbow made by internal and external die cold extrusion process is beautiful in appearance, uniform in wall thickness and small in size deviation. The precision of internal and external die used in this process is high, and the deviation of wall thickness of pipe billet is also harsh.
Medium plate welding
Use a medium plate to make half of the elbow section with a press, and then weld the two sections together. A process such as this is generally used as a bend above the DN700.
Folding other forming methods
In addition to the above three commonly used forming processes, seamless elbow forming also adopts the forming process of extruding the tube billet into the outer die and then passing through the ball shaping in the tube billet. However, this process is relatively complex and difficult to operate, and the forming quality is not as good as the previous process, so it is less used

HEBEI PENGXIN PIPELINE EQUIPMENT GROUP CO.,LTD.. was established in the early 1990s, is located in China elbow pipe capital "mengcun" golden hinterland New hope. Here north of Beijing and Tianjin, south of Jinan, east Huanghua port, excellent location, ease of access and the unique economic environment for the development of the company provides unlimited opportunities.
After nearly two decades of hard business, Hebei Peng Xin Pipeline Group Ltd. has now developed into a set of tube production, steel logistics, sales and export as one of the group of companies. Which owns Hebei Peng Xin Pipe Group Co., Ltd. Hebei Peng Xin Xin Ding Pipe Group Co., Ltd., Hebei Peng Xin Hua Tuo High Pressure Pipe Group Co., Ltd., Hebei Xin Peng Bo Tao Group Pipe Manufacturing Co., four large-scale companies.

Group covers an area 66,600 square meters, the total assets of 318 million yuan, registered capital of 1.0188 billion yuan, annual production of 30,000 tons pipe fittings, pipe throughput of nearly ten million tons. The company currently employs 628 people, including engineers, economists, accountants 128 people. Widespread branches and offices in major cities in the country, while the company also has independent export right, the products are exported to Europe, America, Southeast Asia, Russia and other countries and regions.

Laid a strong foundation for the development Peng Xin Group, the Group has 5,000 tons of press, large heat treatment furnace, a large IF pushing machine, a large bending machine, beveling machine, sawing machine, lathe, drill press, tee cold extrusion machine, plywood hammer, vertical lathe, large sandblasting machines and other related facilities 316 sets. Has advanced physical and chemical metallurgical, nondestructive testing, material testing equipment more than 40 sets. And has the world's most advanced metallic materials direct reading spectrometer, employing all the national and provincial authorities to obtain recognized qualifications, and in strict accordance with the company's quality assurance system for production traceability. After years of hard work group company has passed the ISO9001 international quality system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health and safety management system certification most authoritative industry certification.

Quality determines survival, the details determine success or failure. Customer satisfaction for the purpose of quality concept, created Peng Xin Group's quality and strength.
Peng Xin Group uphold integrity first, create business opportunities business philosophy. Depending on the product quality and Honor for the group life, years of spot check inspection Peng Xin Group's products are always 100% qualified.
Our main products are electricity, chemical equipment, carbon steel, alloy steel, stainless steel, X-class series and a variety of materials elbows, bends, reducers, tees, crosses, head, flange, bearing plug-in, hangers and other pipeline products. Company carbon steel, alloy steel, stainless steel and other wall thickness, size pipe.

Peng Xin Group is the large seamless steel pipe, straight seam steel pipe, spiral steel pipe, steel pipe logistics base, annual inventory of 38,000 tons or more. Operating Chengdu Steel, Shanghai Baosteel, Tianjin big seamless, Jiangsu Chengde, Longchuan steel mills, Shandong giant, Steel, Anshan Iron and Steel and the United States, Japan, Germany, Italy and other countries products. And to Panzhihua, Chengdu Seamless Steel Tube Plant, Hengyang Valin Steel Tube Co., Ltd., Jiangsu Chengde Steel Tube Co., Ltd. distributor in North China. Simultaneously and professional production 300000, 600000, 1000000 subcritical, supercritical, ultra-supercritical, thermoelectric four pipes and pipe factory piping.

Group products are mainly used in petroleum, chemical, natural gas, nuclear power, thermal power, metallurgy, heat pipe, shipbuilding, construction and other industries. With Datang, Huaneng, Huadian, Guodian, China National Petroleum Corporation, China National Offshore Oil Corporation, rings technology into the Engineering Company, Saiding engineering company, China Lu engineering company, Sinochem Second Construction, Chongqing Chemical Medical Group, Xiamen Xianglu Group, Xinjiang Guinness company, chemical and Thailand, sky, Lu Tien-oriented, Plum MSG, Ershisanye, Shandong Sea Chemical Yongxin petrochemical, large stone technology, Chen Hung chemicals, Wanhua Group etc. has always been a good cooperation.

Peng Xin is its distinctive brand positioning, three-dimensional marketing strategies in the industry leading the way.
Group Company has obtained API, CE, ASME and other international and national certification issued by the General Administration of Quality Supervision, Inspection and China special equipment manufacturing license, the State Power Corporation power plant parts supply network member factory, Hebei Boiler and Pressure Vessel Supervision, Inspection and Supervision, Inspection Unit , China National Petroleum Corporation supplies network member unit of China National Offshore Oil Corporation qualified suppliers, Datang International Network Supplier Membership materials, China Huadian Corporation tendering and procurement network provider group-level member of "China metal materials distribution industry leader ", Hebei Province, taxes hero and many other honors
Challenges facing the industry, Peng Xin Group, adhering to the essence Xeon technology, the service flawless reputation to really sincere business philosophy, and constantly introduce new technologies, develop new projects and seek new areas. In the future, Peng Xin people are to unity, progressive attitude, being in the forefront of pipeline equipment industry to do the industry leader position leading international brand.