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Flange, also known as flange flange or flange. Flange is a part of pipe to pipe connection, which is used for the connection between pipe ends; it is also used for the connection between two equipment, such as reducer flange. Flange connection or flange joint refers to the detachable connection of flange, gasket and bolt as a group of combined sealing structure. Pipe flange refers to the flange used for piping in pipeline installation, and it refers to the inlet and outlet flange of equipment when used on equipment. There are holes on the flange, and the bolts make the two flanges tightly connected. The flange is sealed with gasket. Flange is divided into threaded connection (screw connection) flange, welding flange and clamp flange. Flange is used in pairs, low-pressure pipe can use wire flange, more than 4 kg pressure use welding flange. Add a gasket between the two flange plates, and then fasten them with bolts. They also use different flange thicknesses. Pumps and valves, in connection with the pipeline, these equipment parts, also made into the corresponding flange shape, also known as flange connection. In general, the flange connection can be called as a general type of flange connection, such as the flange connection. But this connection is only a part of the equipment, such as the connection of flange and water pump, it is not good to call the pump flange parts. Relatively small, such as valves, can be called flange parts.

Product name : flange
Technical parameters: GB/T9115.1-2000
Product specification: DN32~DN4000
Product packaging : cartons or wooden cases
Product color : metallic color
Product features: Anti corrosion, acid and alkali resistance, long service life, reasonable price calculation, smooth surface, acid and alkali resistance, high temperature resistance, beautiful appearance and strong texture performance
Production process: Professional integral forging, forging manufacturing, plate cutting, plate rolling and so on
Processing method: High precision CNC lathe turning, ordinary lathe turning, argon arc welding and other processing

  • Quality stability: the implementation of the whole process of quality monitoring, meticulous, all-round detection!
  • Reasonable price: efficient internal cost control, reduce expenses, and benefit customers!
  • Fast delivery: advanced production line, sufficient stock, shorten the delivery time!

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Purchase hotline: 021-6221-2627

Product advantages

Flange connection is to fix two pipes, pipe fittings or equipment on a flange plate respectively. Flange gasket is added between the two flange plates and bolted together to complete the connection. Some pipe fittings and equipment have their own flange, also belong to flange connection. Flange connection is an important connection method in pipeline construction. Flange connection is easy to use and can bear large pressure. In industrial pipeline, flange connection is widely used. In the home, the pipe diameter is small, and is low pressure, flange connection is not visible. If in a boiler room or production site, there are flange connected pipes and equipment everywhere.

Product features

1. According to the industry standard of chemical industry (Hg), it can be divided into integral flange (if), threaded flange (th), plate type flat welding flange (PL), neck butt welding flange (WN), so, SW, PJ / SE, PJ / RJ, BL (s) and BL.
2. According to the petrochemical (SH) industry standard, it is divided into thread flange (PT), butt welding flange (WN), flat welding flange (so), socket welding flange (SW), loose sleeve flange (LJ) and flange cover (not indicated).
3. According to JB industry standard: integral flange, butt welding flange, plate type flat welding flange, butt welding ring plate loose sleeve flange, flat welding ring plate loose sleeve flange, flanging ring plate loose sleeve flange and flange cover.
4. According to the standard of ~ (GB), it can be divided into integral flange, threaded flange, butt welding flange, flat welding flange, socket welding flange with neck, loose sleeve flange with butt welding ring, flat welding flange, flat welding ring plate loose sleeve flange, flanging ring plate loose sleeve flange and flange cover.

classic case

Shanghai Luoying cooperates with Shaanxi construction industry base


On March 3, the commencement ceremony of Shaanxi construction engineering construction industry base was solemnly held in ZhouLing new industrial park, Qinhan new town, Xixian new area. Li Xiaodong, deputy director of Shaanxi Provincial People's Congress, attended and announced the commencement order; Yang Zhanwen, deputy director of the Management Committee of Xixian new area, Secretary of the Party committee and director of the Management Committee of Qinhan new town, delivered a speech; Liu Yaohua, chairman and Secretary of the Party committee of Shaanxi Construction Group, delivered a speech; Zhang Yiguang, general manager and Deputy Secretary of the Party committee of Shaanxi construction investment group, made a statement on behalf of the enterprise Words. (subject to the leaders present)
Shaanxi construction industry base is located in ZhouLing Town, Qinhan new town, Xixian new area, 30 km away from Xi'an city and 8 km from Xianyang city. The total planned area is 2000 mu and the investment is about 10 billion yuan. After completion, it is expected to achieve an annual output value of 30 billion yuan. It is of great significance to accelerate the transformation of construction industry and reduce the energy consumption of construction industry. As a leading enterprise in the construction industry in Shaanxi and even in the northwest, in order to further implement the work deployment of the provincial Party committee and the provincial government to adjust the structure, stabilize the growth, catch up with and surpass, and actively respond to the requirements of vigorously promoting the modernization of the construction industry, Shaanxi construction has put forward the strategic deployment of "strengthening the main body and vigorously expanding the two wings", and actively shoulder the historical mission of promoting the construction industrialization. The construction of the project has injected vitality into the development of major leading industries in Qinhan new city, and has a great impact and far-reaching significance on accelerating the integration process of Xi'an and Xianyang and promoting the construction of an international metropolis of Xixian.
The flange produced by Shanghai Luoying is to fix two pipes, pipe fittings or equipment on a flange plate respectively. The flange gasket is added between the two flange plates, and the connection is completed by bolts. Some pipe fittings and equipment have their own flange, also belong to flange connection. Flange connection is an important connection method in pipeline construction. Flange connection is easy to use and can bear large pressure. In industrial pipeline, flange connection is widely used. In the home, the pipe diameter is small, and is low pressure, flange connection is not visible. If in a boiler room or production site, there are flange connected pipes and equipment everywhere.
Taking the opening ceremony of the base as an opportunity, Shaanxi construction will make full efforts to make overall planning, adhere to innovation driven, strengthen scientific and technological research and development, and speed up the construction of the base, so as to lay a solid foundation for promoting the rapid development of Shaanxi construction industry modernization and building a ~ ~ ~ level construction industry demonstration base in our province. The first phase project of the base mainly includes two production lines of residential and municipal components, striving to be completed and put into operation within this year. At the same time, we will complete the relocation of Shaanxi Jinniu group in June next year, and accelerate the R & D and manufacturing of gas-fired boilers, pulverized coal-fired boilers and preheating boilers. On this basis, we will continue to develop new building industry components and boiler products which are in line with the development of circular economy, green, low-carbon, energy-saving, high added value.

Product diagram

 flange

Parts materials

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 flange

No Part Material
one Flange Cast and forged carbon steel (Q235), stainless steel (201, 304, 316, 321), plastic (CPVC, PVDF, PPH, UPVC, RPP)

technical parameter

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Product service

Professional manufacturing, professional services, Luoying to create more value for you!
Constantly improve the quality of service, excellence, "sincere service" is the eternal theme of Luo Ying. Luo Ying strictly in accordance with ISO9001-2000 quality system certification requirements, strict quality control, responsibility to people, to ensure the healthy operation of production, sales and service. To strengthen communication with users, we will wholeheartedly provide customers with high-quality products and perfect services. Hereby, Luo Ying makes the following commitments:

Product standards
The products are designed, manufactured and accepted in strict accordance with Chinese GB, Hg standards and American API standards. The width of sealing surface exceeds the national standard.
Pre sales service
Product introduction, technical exchange, non-standard product design, troubleshooting.
In sale service
1. Keep the contract, ensure timely supply, keep in touch with customers at any time. 2. For special or complex products, our factory arranges technical personnel to train and guide users in the use, troubleshooting, adjustment and maintenance of products.
after-sale service
1. The warranty period of Luoying's products is 12 months from the date of delivery, and the "Three Guarantees" service (return, replacement and repair) is implemented.
2. During the use of the products, our factory regularly organizes technical and inspection personnel to visit and consult users for feedback on product quality, use status and improvement opinions, so as to further improve product quality.
3. After sales service personnel rush to the scene within 24-36 hours (48 hours outside the province).
4. For after-sales service, users are required to fill in the quality feedback form after service, and make appraisal opinions, so as to jointly improve the product quality and service quality of Luoying.

Ordering process and instructions

1. Please fax customer purchase list to 021-64207088 e-mail: Luoying @ luoyingsh.com or call 021-622122627.
2. List and price list of products for customers.
3. Specific agreement: delivery date, special requirements and other matters.


Ordering instructions
1. If the customer has special requirements for the product, the following instructions shall be provided in the order contract:
(1) Structural length
(2) Connection form
(3) Nominal diameter, full bore, reduced diameter, pipe size
(4) Medium range and temperature
(5) Our factory can make and design special products according to the special requirements of customers.
2. Our factory can configure and design special products according to the special requirements of customers.
3. If the customer provides the determined product type and model, the customer shall correctly explain the meaning and requirements of the model, and sign the contract under the condition that both parties understand and agree.

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You can fill in the form below and submit your contact information and product requirements to us. We will contact you as soon as possible. Thank you! In order to get in touch with you in time, please fill in your contact information and requirement information completely.

contact us

  • Customer service hotline: 021-6221-2627
  • Business QQ: 319992131
  • Business fax: 021-6420-7088
  • Email: info@luoyingsh.com
  • Company address: Building 10, north side of Songzheng highway, Shihudang Town, Songjiang District, Shanghai
  • Post code: 201201

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