The IFR use the traditional webbed hexagon structure, the pontoons are combined on the skeleton. The pontoon is placed orderly, so the internal floating roof could increase and decrease the pontoons according to the different buoyancy in the premise of the enough strength of the IFR to ensure of the IFR meeting the requirements.
Loading arm is a kind of important fluid transfer equipment nowadays in the petrochemical industry
Branched double-pipe loading arms, also known as independently supported double pipe loading arms. Its characteristic is an additional pipe, usually for gas return. The gas and liquid pipes move synchronously. Inner and outer arms are on one common weight distribution system and are independent from product pipes. The weight of the loading arm and product loads are borne by support structures. Process pipelines and swivel joints basically do not bear loads. Swivel joints are lightly loaded, allowing long operation life. Support single-tube loading arms are compactly structured, commonly used in the handling of LNG.