Dooflex is China unique professional manufacturer of marine salvage inflatable plastic air lift bags.
Marine salvage inflatable plastic air lift bags is one kind of underwater lifting bags. It is fabricated from heavy duty polyester cloth coated with PVC made in German.
Each  marine salvage inflatable plastic air lift bag  is equipped with manual air dump relief/dump valve, which can be controlled easily to change the buoyancy by the bottom rope. 
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FAQ
1. Q: How long is the warranty period?
  A: The warranty period is 12 months or 18 months from the shipping date.
2. Q: Do you provide rent service, contract service?
  A: We have many water bags and air lift bags ready for rent service for clients all over the world.
    We have ability to design and can contract the load testing project, with our own water bags and  workers.
3. Q: What is the production standard and safety factor?
  A: All underwater air lift bags are manufactured in compliance with IMCA D016, safety factor is  5:1.
    All crane load test water bags are manufactured in compliance with LEEA051, safety factor is 6:1.
4. Q: Do you have stock?
  A: We have many normal size underwater air lift bags and load test water bags in stock. Ready for shipment.
5. Q: What kind of certificate do you provide?
  A: Our load test water bags are Type Certificated by TUV NEL. We can provice ABS, BV, LR third party certificate.
     Provide the certificate for masterlink, shackles, lifting belts and other accessories.
If you have any other questions, please feel free to contact us.
Duplex Stainless Steel Tubes / Pipes, are made by Duplex stainless steels, can be both seamless and welded tubes.
Depending on different steel grade and diameter, and wall thickness of the Duplex Stainless Steel Tubes.
Duplex stainless steels are called [duplex" because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel.
The result is a microstructure of roughly 50% austenite and 50% ferrite.
Duplex stainless steels have a two-phase microstructure of austenite and ferrite grains.
The main differences in composition, when compared with an austenitic stainless steel is that the duplex steels have a higher chromium content, 20–28%; higher molybdenum, up to 5%; lower nickel, up to 9% and 0.05–0.50% nitrogen.
Duplex Stainless Steel Tube,Duplex Stainless Steel Pipe,Stainless Steel Duplex Pipe,Duplex Stainless Steel Tubes
TORICH INTERNATIONAL LIMITED , https://www.steeltubepipechina.com