MARPOL 73/78 – A General Overview

MARPOL 73/78, since it came into force in 1973 and later revised by the protocol in 1978, ensures that shipping remains the least environmentally damaging modes of transport. It clearly highlights the points to ensure that marine environment is preserved by elimination of pollution by all harmful substance which can be discharged from ship. MARPOL 73/78 This marine environmental convention consists of six implemented Annexes for controlling and eliminating of marine pollution. Annex I:  Regulation for prevention of pollution by oil  from operational measures as well as from accidental discharges. Key relations:  1. Ballasting or cleaning of cargo oil tanks (Emcy’ ballast, … Continue reading MARPOL 73/78 – A General Overview

Ballast Water Management System

Ships need ballast water for many reasons: To achieve the sufficient draft and stability To reduce stress on structure integrity To correct the list or trim Ships carry ballast water to maintain stability in rough seas and when sailing without cargo. After a vessel has been unloaded the water is typically pumped into purpose-built tanks onboard. It is then drained during loading at the destination port, bringing ashore organisms which pose environmental and even health risks. This is suspected to have contributed toward a cholera outbreak in Peru – bệnh dịch tả hoành hành tại Peru that affected over 10,000 people. The International … Continue reading Ballast Water Management System

Passivation of Stainless steel

It’s well known that the SUS materials (piping) very often demand a final step of surface treatment, i.e. passivation, in order to achieve a product with acceptable visual appearance and high corrosion resistance. The passivation process removes chips and “free iron” contaminations left behind on the surface from different fabrication operations. These contaminants are potential corrosion sites that may result in premature corrosion and ultimately in deterioration of the component if not removed. There many argument and penalty during chemical tanker building with those relating to Painting schedule and Passivation quality. All the jobs are conflicted and much delayed on … Continue reading Passivation of Stainless steel

ODME – Oil discharge monitoring equipment

Oil tankers carry different types of oil cargo in their cargo tanks and it often happens that after discharging the oil cargo in some port, the ship sails without any cargo to some other destination. In order to do so, it has to take ballast from the sea to get better draught and stability. For this reason, ballast water is taken into cargo tanks wherein generally oil cargo would have been carried. It is to note that the ballast water carried in cargo tank has to be discharged out at sea before the next cargo loading. Therefore, Oil Discharge monitoring … Continue reading ODME – Oil discharge monitoring equipment


Megger test is the test that evaluate the insulation resistance quality. Insulation starts to age as soon as it’s made. As it ages, its insulating performance deteriorates. Any harsh installation environments, especially those with temperature extremes and/or chemical contamination, accelerates this process. This deterioration can result in dangerous conditions in power reliability and personnel safety. As such, it’s important to identify this deterioration quickly so that corrective steps can be taken. One of the simplest tests and its required test instrument are not universally understood. To help eliminate this lack of understanding, let’s discuss in detail Insulation Resistance (IR) testing … Continue reading MEGGER/RESISTANCE TEST