What is ASM International?
ASM Metal Handbook ( preface )ASM International is brief understanded as the American Society for Steel Treating (later the American Society for Metals, now ASM International) published a small collection of data sheets–the first edition of what became known as Metals Handbook. The series has … Continue reading What is ASM International?
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
Pipe Flushing (Full procedure, standards NAS, Filter selection, magnetic filter config.)
There is two type of flushing as below which are enough for pipelines flushing. 1. Chemical flushing (pickling). 2. Oil flushing. CHEMICAL FLUSHING (PICKLING) The purpose of chemical flushing is to remove any dirts, debris, oil, grease, rust, scale, ect form the pipelines. During … Continue reading Pipe Flushing (Full procedure, standards NAS, Filter selection, magnetic filter config.)
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
Protected: PSPC – Performance Standard for Coating of Ballast Tanks – Part 2
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PSPC – Performance Standard for Coating of Ballast Tanks – Part 1
History briefs: In 2002, TSCF published “Guidelines for Ballast Tank Coating Systems and Surface Preparation” provided differing levels of standards for minimum target coating life of 10, 15 and 25 years (denoted as TSCF10, TSCF15, and TSCF25). In order to address the same issue for all vessels, in 2006 IMO adopted Resolution MSC 215(82) “ Performance Standard for Protective Coatings for Dedicated Seawater Ballast Tanks in all Types of Ships > 500GT and Double-Side Skin Spaces of Bulk Carriers >150m ” (commonly referred to as PSPC). This resolution came into force in 2008. PSPC is intended for a minimum target coating life of … Continue reading PSPC – Performance Standard for Coating of Ballast Tanks – Part 1
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
Pitfalls of Pump Piping design
Rule No. 1 Position the pump in an accessible location. When laying out the system, give some consideration to the people who eventually will have to look after the pump that easy access and working room for routine maintenance. Also, make sure overhead space is adequate for lifting devices and working clearance. Rule No. 2 Make the pipe diameter on both the inlet and the outlet sides of the pump at least one size larger than the nozzle itself. On the horizontal inlet side, an eccentric reducer is required to decrease the size of the pipe from the suction line … Continue reading Pitfalls of Pump Piping design
MGPS – Marine gross protection system
Marine growth in sea chests, box coolers and seawater piping systems is a potential threat for the performance and condition of your ship or installation. Blockages caused by barnacles (hầu) and mussels (trai) are expensive and time consuming to remove and can have serious consequences. Engines will run at abnormally high temperatures, resulting in unnecessary increased fuel consumption and lower performance. To combat this risk the Marine Growth Prevention System (MGPS) was developed. Once installed it provides low maintenance and continuous protection against most hard and soft foulings as well as corrosion. The Marine Growth Prevention System utilizes an impressed … Continue reading MGPS – Marine gross protection system
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