The Material Of Bending Restrcitor Subsea Engineering System - China

The bend restrictor system includes polymer elements, metal elements, hybrid elements, polymer element fasteners and interface structures.

The polymer element of the bend limiter is generally made of polyurethane material, which can withstand larger loads.

The typical tensile strength of the polymer bending limiter material is about 45 MP: (23 C), and the elongation at break is 15% ~ 20%".

Compared with the steel bending limiter, the polymer bending limiter does not require a cathode Protection system.

At the same time, compared with copper, the density of polymer materials is relatively small, so the mass applied to the composite hose system is smaller.

The strength of polymer materials decreases at high temperatures and increases at low temperatures.

The polymer component material of the bend limiter should have the following properties:

1 - Low water absorption; 2 - Hydrolysis resistance; 3 - Not easy to aging; 4 - High temperature resistance; 5 - Can bear constant load during the whole life without creep damage; 6 - Reasonable mechanical stability; 7 - Elastic modulus does not decrease with temperature.

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