LOAD-IN & LOAD-OUT

Load-out is one of the critical parts during the construction of an offshore structure. The most popular load-out methodology is load-out by using SPMT (Self Propelled Modular Transporter). SPMT can transport to the uneven ground condition by using a hydraulic system. Trailer SPMT platform can be jacked up/down 1220mm+300 -300 (minimum height of Trailer platform is 920mm; maximum height of Trailer platform is 1520mm) and steering system is controlled himself by independent hydraulic system & remote-control power pack by trailer operators. Load per axle for SPMT GoldHofer maintains 36.6 tons (at speed of 5km/h). PPL is one of only three Load-out service providers in Vietnam with in-depth knowledge of gas and oil load-out experience for seven years.

shifting skid from the fabrication yard to jetty
Shifting Skid from the fabrication yard to jetty.

 

 

Offshore structure, such as topside and substructure, is fabricated at the yard then transported and installed to their site operation. Load-out is the transfer of a major assembly onto a barge by horizontal movement or by lifting. The load-out process is more complex than simply sliding it off the quay onto the barge. Since most structures in the offshore industry are of a larger scale and heavier weight, it will affect the stability, draft, and the structure of the barge. General inspection for trailers will be done by PPL technical team and Marine Warranty Surveyor (hereinafter called MWS) prior to load out operation.

tugs and winches are used to anchor the rope to keep the barges stable during the load-out process
Tugs and winches are used to anchor the rope to keep the barges stable during the load-out process.

On the heavy-lift of offshore structure, SPMT (self-propelled modular transporter) are capable to carrying heavy load, SPMT is a flat platform transporter with high capacity can accommodate 30 tons of load each 4 or 6 axles lines. Trailer configurations are designed to meet the specific parameters and constraints of each project, to redistribute loads onto trailers, fabrication yards and wharves. Transferring offshore structure from quay to the barge can inflict several problems since the state of the stress in the offshore structure happen during transportation therefore SPMT can ensure the balance loads and stability on uneven road surfaces using hydraulic leveling system.

steel plates used to make a link bridge between jetty and the barge
Steel plates used to make a link bridge between Jetty and the Barge.

PPL’s 360˚ computer-controlled steering capability of SPMTs provides a wide choice of build positions. Several computers control each of the SPMTs wheels individually. The cylinder attached to each wheel can be adjustable in ride height. This allows the moving step of an offshore structure during load-out between quayside to the barge is positioned to remain flat and even weight distribution. The hydraulic leveling system of SPMT ensures the stability of the structure when SPMT running on uneven roads. Individual transporters can be hydraulically and electronically linked to provide a support platform matched to the characteristics of the load and the route.

High-capacity ballast pump systems can perform ballasting operations of up to 5000T per hour to balance the barges, adjust the barge deck surface with the wharf during the loading-out process.

CASES