
NO | Name |
1 | Flange |
2 | Bellows |
3 | Stream direction |
4 | Inside inner sleeve |
5 | Outer tube flange |
1. Flexibility and deformability.
2. Good pressure bearing ability
3. Reduce axial load
4. Absorb equipment vibrations
5. Protect the safety of pipelines and equipment.
In addition, it also has advantages such as durability, high temperature resistance, high pressure resistance, corrosion resistance, and environmental protection.
Nominal Diameter(DN) | A | B | B1 | H | A1 | Weight(kg) |
300*400 | 300 | 400 | 609 | 411 | 709 | 38.7 |
300*700 | 700 | 1009 | 52.1 | |||
400*500 | 400 | 500 | 709 | 411 | 809 | 47.6 |
400*800 | 800 | 1109 | 61.2 | |||
500*600 | 500 | 600 | 809 | 411 | 909 | 56.7 |
500*1000 | 1000 | 913 | 1413 | 111.9 | ||
600*700 | 600 | 700 | 909 | 411 | 1009 | 65.6 |
600*900 | 900 | 1013 | 1313 | 111.9 | ||
700*500 | 700 | 500 | 809 | 411 | 1009 | 61.2 |
700*800 | 800 | 1009 | 1213 | 111.9 | ||
800*800 | 800 | 800 | 1213 | 411 | 118.5 | |
800*1600 | 1600 | 2013 | 171.9 | |||
900*400 | 900 | 400 | 709 | 411 | 1209 | 65.6 |
900*1200 | 1200 | 1313 | 1613 | 151.7 | ||
1000*600 | 1000 | 600 | 1013 | 411 | 1413 | 118.5 |
1000*1000 | 1000 | 1413 | 145.2 | |||
1200*600 | 1200 | 600 | 1013 | 411 | 1613 | 131.8 |
1200*1200 | 1200 | 1613 | 171.9 | |||
1400*700 | 1400 | 700 | 1113 | 411 | 1813 | 151.7 |
1400*1200 | 1200 | 1613 | 185 |
Note: If the medium is oil, acidic or alkaline substances, and there are special requirements for the working temperature, you can customize it by sending a letter or drawing. Please specify when ordering.

Metal duct expansion joints application scope: Import and export of various pumps, valves, and air compressors; Various types of fire protection piping, air conditioning piping, steam piping, etc; General factory piping and occasions that require hygiene; Mechanical equipment piping, where shock absorption and compensation for thermal displacement are required; Domestic water piping and occasions that require flexible connections.
1.24-hour online
2.Free samples provided
3.Support customization
4.Provide drawings
5.Multiple payment styles to choose from
6.Factory inspection (material, specifications, quantity, pressure, packaging)
7.Long warranty period
8.Suitable packaging for transportation

Q1:What's the material of metal duct expansion joints?
A1:The material can be SS304,ss306,carbon steel,etc..It depends on the working condition.
Q2:What's the warranty period?
A2:We provide 18 months' warranty.
Q3:What certificates can you provide?
A3:We could provide CE,ISO certificate.
Q4:Can we get a sample?
A4:Yes,we could provide samples for you to test the quality.