The rated pressure for flexible steel pipes is ANSI-compliant, by laying a flexible steel pipe over the old pipe and using the API17J classification method and material to protect the bottom of the pipe from external influences. Flex Steel Conduit And Fittings The design criteria for flexible steel pipes on land are slightly offset from the requirements of the API standard; grade 600 is equivalent to 10.
Pipes are forced to shut down or even outage due to corrosion. The tests were carried out in accordance with the requirements of APIRP17B, and the damage to the environment was reduced, and the tensile and pressure loads were guaranteed to be delivered to the pipe structure. The terminal fittings are designed to meet the integrity of the maintenance structure.
Flexible steel pipe with four-layer structure Flexible sleeve can be easily bent does not affect the continuity of the tube objects, Flex Steel Conduit And Fittings tensile and breaking limits are within the specified range, the pressure, 17K and RP17B, the most inner layer is extruded thermoplastic tube.
The design of offshore flexible steel pipe is based on API 17J, in the transmission of liquid from the sealing effect .3MPa, it has the ability to resist long-term ultraviolet radiation .89MPa; grade 400 is equivalent to 6.15MPa, such as grade 300 is equivalent to 5. Flex Steel Conduit And Fittings The outermost layer is an extruded thick outer shield and excludes external static electricity. Flexible steel pipe repair technology can not only save costs, the use of flexible steel pipe repair technology can solve this problem
Flexible steel pipe is mainly used in the earthquake requirements of the pipeline to withstand vibration and telescopic deformation of the building has a strict waterproof inside the wall and the general applicable wall thickness is 300mm
Material properties of flexible steel tubes
Although the flexible pipe according to the different materials have many different classification, but its common are:
1, strong corrosion resistance. Flex Steel Conduit And Fittings Glass fiber reinforced plastic pipe, rubber material corrugated pipe is a non-metallic materials, corrosion resistance; metal coil corrugated pipe galvanized layer also has good corrosion resistance.
2, the pipeline is flexible and good. Glass fiber reinforced plastic sand pipe is made of glass fiber winding, in order to increase the middle of the sandwich sand; rubber (or plastic) material bellows is hot cast type, some varieties in the middle with metal wire skeleton, metal bellows is book metal Crimping, Flex Steel Conduit And Fittings the axial stiffness of these pipes is very good, the stiffness value increases with the wall thickness of the pipe. Compared with the reinforced concrete pipe, the axial large deformation will not damage the pipeline itself, the maximum axial allowable deformation of the pipe length of 1%, the maximum radial allowable deformation of 5%, (manufacturers to provide value) can be well adapted Weak foundation. So it can also be called flexible steel pipe.
3, transport installation is simple. Pipeline production length of 6 to 8 meters, or even longer, less interface, so the installation period is short.
4, the interface construction time is short. The use of mechanical, physical, chemical seal instead of using concrete wiping seal, and some even do not make concrete base, eliminating the need to wait for the time of life of concrete.