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Quick Details

  • Material: Stainless Steel
  • Technics: Forged
  • Type: Union
  • Place of Origin: Shandong, China (Mainland)
  • Model Number: ZDW
  • Brand Name: Tongpeng
  • Connection: Welding
  • Shape: Other
  • Head Code: Square
  • application: the petrochemical trade

Packaging & Delivery

Packaging Details wooden case or the customer's requirement
Delivery Time 30days


1)ISO9001-2008International Quality Certificated.
2)ASME U type seal
3)bellows expansion joints specially designed for you


Product Description


Thermal expansion in pipelines,ducts,and vessels which carry hot or cold fluids,or which are exposed to large variation

in ambient temperature, is a major problem conforing designers. As the metal temperature of the pipe, duct, or vessel increases and decreases,its length also varies due to thermal expansion or contraction .Therefore, unless compensation is provided for these dimensional changes, high stresses will be induced in the piping, ducting, or vessel and large forces will be transmitted through the system to  anchors and connected equipment.And your system must run at maximum efficiency.

The specially designed  metal expansion joint can  absorb the different movement as follows:

Manufacturing capacity:


DN:                                          8mm-10000mm                                             

Thickness:                             0.15mm-70mm                                             

Forming method                   Hydraulic forming                                           

Pressure(MPa):                     -30 MPa(metallic)   -0.2MPa(nonmetallic)

shape:                                     U     V   S type Etc.                                        

Temp.(oC):                             -196 to 1400                                                     









This is the simplest form of expansion joint, of single bellows construction, designed to absorb all of the movements of the pipe section in which it is installed. According to operated pressure of a device, this model is manufactured with or without the shrink ring.




Easy to install


Low maintenance.

Absorbs all three types of movement.




Packaging & Shipping

  Packing:      wooden case or the customer's requirement  

 Shipping:           By air or by sea

Company Information


About us

Our products are widely used in those industrials as follows: petroleum, petrochemical, offshore Oil , chemical, salt chemical industry, chemical industry, fertilizer, aviation, nuclear energy, shipbuilding, electric power, metallurgy, thermal network ,high-voltage electrical appliances, medicine, building materials, sea water desalination ,pressure vessel industrials etc , and they are fully recognized by domestic and foreign customers.

Since the company established, we are specialized in research,development and manufacture of expansion joints with holding the learning attitude and adhering to the innovation and development . We have made great progress in many aspects such as the manufacturing technology,product quality and management. The company has obtained the qualification -Manufacture License of Special Equipment People’s Republic of China , the US ASME certification, EU PED - CE certification ,and five classification society certification: China CCS , United States ABS, France BV, Korea Kr, Norway DNV. In the application material,except the traditional expansion joint material, there is a major breakthrough in non-ferrous metal materials and non-ferrous metal alloy materials , especially in nickel and nickel base alloy, titanium and titanium alloy, zirconium and zirconium alloy ,tantalum and tantalum alloy, Niobium and Niobium alloy and other materials. 


Our Services

  Deaign and manufacture best products for you.


  To establish smooth bussiness between us, pls provide parameters as follows:

                                  Expansion Joint


Used for

Size (DN)





Design Temperature

Working Temperature

Design Pressure

Working Pressure










Two or four or no




Pressure grade





If you have any other requirement, pls tell me freely. We will try our best.

It is very kind of you to send us more information such as the drawing.














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China (Mainland) | Manufacturer, Trading Company
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