Carbon steel flange depending on the sealing surface has a variety of classification, the seal face different summarized below:
Flange sealing surface form and use of the environment has a direct relationship, Hangsheng flange factory also repeatedly referred to the classification of the sealing surface in other documents.
1. Sealing face of the whole plane types (FF) : used in tablet form more flange with smaller environment suitable for kg pressure, such as PN1.0 conditions.
2. The concave and convex surface sealing surface type (FM) : more appeared on the butt and socket welding flange, not commonly used in the system, in the United States in European is more, more appeared in the PN4.0, PN6.4 MPA pressure level, but not conducive to the gasket replacement.
3. The sealing face of the convex type (RF) : convex flange's most widely used, more than in the U.S. the flange in PN2.0, PN5.0, PN10.0 MPA pressure rating, in the European flange multi-purpose in PN1.6, PN2.5 MPA pressure level.
4. Grooved face seal face type (TG) : usage with concave and convex surface is the same.
5. Ring groove surface sealing surface type (RJ) : often used with form of butt welding, socket welding of no, multi-purpose in an environment of high temperature and high pressure or both high, in the U.S. for PN10.0, PN15.0, PN25.0, PN42.0 MPA pressure levels, also used in pressure in the European level high pressure the ball above the flange.
Cangzhou Hangsheng flange&pipeline equipment co., LTD., specializing in the production of flange pipe fittings for more than 20 years, rich experience, advanced equipment, perfect sales, hope the new and old customers visit negotiate.

Cangzhou Hangsheng Flange&Pipeline equipment Co.,Ltd ,was founded in 1989. We are one

of the earlier company which produce flanges and pipe fittings.The factory was located in “ the 

capital of elbows & pipe fittings”  ---------Mengcun Hui Autonomous County, Cangzhou city, 

Hebei province,China.Acomprehensive company specializing in the series including developing,

research ,produce, processing and sale steel pipe fittings.

Our factory is north of Beijing and Tianjin city, south of Shandong province, west of  Beijing--Shanghai Expressway, east of Beijing -----Shantou Expressway and Huanghua harbor, a very

convenient location for transportation.  All aspects of development of our Group depends on 

advanced technology, and talented employees.

On the bases of advanced technology & equipment for production, testing&detection system.

We are able to produce all kinds of carbon steel,stainless steel and alloy steel pipe fittings.Such 

as: flanges, elbows, reducers, tees, and so on. Our generally standards are as follows: Chinese 

standards,German standards,American standards,Japanese standards,British standards,Russion

standards,  European standards, Italian standards, ISO standards, and so on. We can produce

also as per the customers’ requests and drawings.

Our products are widely used in petroleum,  chemical,  metallurgy, shipbuilding, paper,  power,

aerospace,  pharmaceutical, water, treatment, chemical fiber,urban construction and machinery 

and equipment industries.Products can meet the needs completely for pipe connection.The aims

of production line is meeting the high quality .  

We’ve got ISO9001 certificate,and own the rights of import and export.Cangzhou Hangsheng 

is a unit of pressure piping components manufacturing permission.Also is a member of --------

petrochemical companies,  power companies’ supplier unit from internet. We are scientific and

technological and trustworthy at the level to provincial enterprises.Our products were sold to

China ,South Korea,Russia,the Middle East,Southeast Asia,South AmericaWesternEurope and

other countries and regions, totally more than 40 countries. And got highly praise and very good

reputations.


All our staffs adhering to"quality first and credit first", following the steps of times and devoting 

ourselves to founding the best enterprise in steel fittings industry. A large number of inventory,

strictly inspection of out-put and in-put, and perfect delivery system made us service better to 

meeting the needs of all the customers.Our company keep the policies:

create boutique, fulfillment promise,  continuous improvement,  pursue the perfection quality . 

And the marketing idea:loyalty marketing,create mutual brilliant.Getting dependence and praises 

of both domestic and foreign customers. All the goods will be delivered timely. We will always 

adhere to: strive for survival on the basis of quality,aims at good faith.


Welcome friends all over the world coming and visiting our factory for further discussion!