Flexible pipelines can have the function of anti-corrosion. Putting flexible titanium pipes on old pipelines can deal with the problems of pipeline corrosion. Flexible titanium pipe modification skills can not only save costs, but also reduce environmental damage.
The flexible titanium tube has a four-layer layout, the innermost layer is a kneaded thermoplastic tube, which plays a sealing effect in the transmission liquid; the center two layers of fabric are made of carbon-filled polyethylene tube, which has resistance to ultraviolet radiation for a long time. Ability, and can remove external static electricity. The outermost layer is a thick outer shield kneaded to protect the bottom layer of the pipe from external influences.
The extra pressure applicable to flexible titanium pipes conforms to ANSI classification, such as grade 300 is equivalent to 5.15MPa; grade 400 is equivalent to 6.89MPa; grade 600 is equivalent to 10.3MPa. The description of offshore flexible titanium tubes is based on API 17J, 17K and RP 17B. The description of the flexible titanium tube on land slightly deviates from the requirements of the API specification. Using the API 17J classification method and data, the pressure, tensile force and damage limits are within the scope of the rules. The experiment was conducted in accordance with the requirements of API RP 17B.
The description of the terminal fittings should be able to satisfy the requirements of maintaining the integrity of the layout, ensuring the sealing of the inner and outer kneading molding layers, and ensuring that the tensile and compressive loads are transmitted to the pipe layout. The samples of the terminal fittings have passed the explosion and axial tensile test.