Who we areengineer test water bags

Pioneer and Leader of Chinese underwater air lifting bags and water weight bags. 

We are the first and unique Chinese professional manufacturer of underwater air lifting bags. We are not "engineering company". All the products are manufactured by ourselves in our own factory.

We produce underwater air lifting bags, water weight bags, pipeline buoyancy bags, water storage tank, inflatable fenders and buoys, pipe stoppers. All these products are manufactured from heavy duty PVC/TPU coating fabric comply with international standard IMCA D-016 and LEEA 051, under the control of ISO 9001:2008.

We create outstanding products always ... ...

Who we are

We are your best partner of load testing and marine salvage. We are your first choose of air liftin...

Quality Assurance

DooFlex aims to be the best partner of marine salvage and load testing. Although DooFlex is the new ...

Why DOOWIN

We create outstanding products always ... ... Our experienced engineers and workers design and ma...