The definition and related characteristics of flexible steel pipe
Pipeline due to corrosion and forced to shut down or even out of things often occur, the use of flexible steel pipe repair technology can solve this problem, is a flexible pipe set to the old pipe. Flexible steel pipe repair technology can not only save costs, Flex Steel Conduit And Fittings but also reduce the damage to the environment.
The flexible steel pipe has a four-layer structure, the most inner layer is extruded thermoplastic tube, in the transmission of liquid from the sealing effect; the middle of the two lining is filled with carbon polyethylene tube, it has a long-term resistance to ultraviolet radiation , Flex Steel Conduit And Fittings And can exclude external static electricity. The outermost layer is an extruded thick outer shield for protecting the bottom of the tube from external influences. Standard flexible steel pipe for the rated pressure in line with ANSI classification, such as grade 300 equivalent to 5.15MPa; grade 400 is equivalent to 6.89MPa; grade 600 is equivalent to 10.3MPa.
Offshore flexible steel pipe design is based on API17J, 17K and RP17B. The design criteria for flexible steel pipes on land are slightly deviated from the requirements of the API standard. Flex Steel Conduit And Fittings Using the API 17J classification method and materials, the pressure, tension and damage limits are within the specified range. The test was carried out in accordance with the requirements of APIRP17B. The terminal fittings are designed to meet the integrity of the maintenance structure, to ensure that the inner and outer extrusion molding layers are sealed, Flex Steel Conduit And Fittings and to ensure that the tension and pressure loads are delivered to the tube structure. The samples of the terminal fittings were subjected to blasting and axial tensile tests.
Canada has a pipe with a length of 2km and a pipe diameter of 6in, which has been shut down due to corrosion problems. The pipeline of the pipeline to go through 5 to 6 landowners of the zone, apply for the construction of a new pipeline is particularly difficult, therefore, decided to repair the pipeline. Flex Steel Conduit And Fittings The repair method is to use a flexible steel to the old pipe, so you can not apply for the purchase of new pipes, significant savings in spending and reduce the damage to the environment. The repair line is used to deliver liquid carbon dioxide into the injection well to increase oil recovery. There are two 90 ° turns and a road crossing at the place leading to the wellhead. Pipe through the operation before the clearance, Flex Steel Conduit And Fittings removal and other obstacles to work.