Hydrographic surveys with video and study
Drafinsub performs morphological evaluation of the sea floor and related projects of the laying place by monitoring or by the use of a multibeam for the pipeline digging and surveys.
Drafinsub has qualified and second level certified personnel able to performs NDT inspections by the use of “ultrasound” and “penetrant liquid” techniques
The NDT inspection is a common technical survey required by major Classification Authorities both for ships and floating matters. Singe long time Drafinsub cooperate with the major Classification Authorities.
Design, Construction, Laying and Maintenance of underwater pipelines
In the last ten years Drafinsub realized over 17km of underwater pipelines with a diameter of DN400 – DN1200
In order to be more competitive Drafinsub has designed and built the “Meridio I” pontoon equipped to reduce costs and schedules concerning the preparation and the laying of underwater pipelines.
It has been designed to reduce any risks occurring handling the long sections of pipelines and all the welding process are performed under API1104 rules and verified by X-Ray.
Electrical and telephone cables lying
Drafinsub is able to perform assistance during the laying of underwater cables and optic fibre.
Underwater and hyperbaric welding
Drafinsub personnel is qualified and certified under EN15618-1 regulations and procedures are certifies under WPS EN ISO15609-1 regulation.
Underwater cutting techniques
Drafinsub has several equipments used to performs oxy-acetylenes cuts (Broco) and also underwater diamond wire cutting machine which allows more precise cuts.
Recently we have performed interconnection pipeline demolition of one section, it has been performed by placing the machine with the assistance of a diver and monitoring the operation with a ROV.
Non corrosive facing with epoxy resins
Drafinsub performs cleaning and plasticise of splash zone using epoxy resins.
In water surveys with IWS certified technical personnel
Drafinsub cooperate with the major Classification Authorities ie. Bureau Veritas, Lloyd Register, Rina Services, DNV-GL and major maritime agencies ie. Scamp Ltd, UMC International, Hydrex, V Ship, Banchero e Costa, MSC, Mariotti, Grimaldi.
The in water surveys are performed with video tapes that allows to evaluate the status and to extend the classification at floating hull.
Drafinsub performs every year about sixty in water survey
Underwater mine clearance
Drafinsub is from long time certified by Italian Ministry of Defence and has employed the most qualified BCM personnel.
One of the main commission is the “Saipem Montaldo di Castro” rig where Drafinsub performed a mine clearance of 35km of sea bottom pipeline.
Laying of buoys
Drafinsub still cooperate with buoys suppliers performing the laying and the securing.