Flexible rubber expansion bellows common problems and solutions

Flexible rubber expansion 

1. Is the flange galvanized?

Yes, carbon steel flange not painting anticorrosive paint must be galvanized in order to avoid rusting. Usually, we choose electronic galvanized and hot dip galvanized, and most of our customers will choose hot galvanizing.

2. What kind of standard of your drilled flange?

Besides Chinese national standard, we also support American standard, German standard, British standard, Japanese standard, European standard and Australia standard. If you can give us the center distance of the hole, the number and diameter, we can also produce customized flange.

3. Does your company have spool type flex rubber expansion bellows?

Yes, considering that the pipe length will be longer or shorter than the expectation after finishing the installation of the pipes and the cost of producing new mold is expensive, we can produce spool type flex rubber expansion bellows according to your requirements.

4. Can the inner layer rubber and outside layer rubber be made from different rubber material?

Yes, we can produce the flex rubber expansion bellows according to the environment, and we will choose different rubber for the inner layer and outside layer.

5. Can I only buy ball without the flange?

Yes, and the price will be cheaper. For small diameter flex rubber expansion bellows, we have goods in stock and we can offer you a free hydrotest, but for large diameter flex rubber expansion bellows you need to order.

6. How long is your product’s warranty?

12 month. From the day the customer receiving the goods, we grant a free replacement if the products have any problems during the guarantee period.

7. Can you offer the flex rubber expansion bellows sample?

For standard type we can offer the sample, but the customer will afford the freight. For non-standard or more quantity, we will charge for the sample.

8. Does the flex rubber expansion bellows have inspection report?

Yes, all of our product will be conducted hydrotest and leave the factory with a qualified inspection report.

9. Can you offer the drawing?

Yes, we have a excellent engineer team, and they will offer your professional drawing and technical support.