CENTRIFUGAL PUMP (Introduction)
Well for the inspectors, trainees, and freshers who just move into the piping systems will have their introduction, with fluid transporting devices which are mainly “PUMPS“. Almost piping system have the basic and the mostly optimized device know as centrifugal pump those are handled easily and it is cheaper when compared to other pumping devices, even maintenance cost is much lesser than the others. But the LIMITATION ( •cannot handle entrained air – 3%max •cannot handle viscous liquids) THERE’RE 5 MAIN PUMP STYLES: 1-Horizontal Split Case good wear resistance (Mean of higher price ) suction and inlet are opposite high head pressure ( Cooling … Continue reading CENTRIFUGAL PUMP (Introduction)
SHIP TONNAGE AND HYBRID MEASUREMENT
Everyone who has looked at specifications for ships is often bewildered by the many different tonnages used for the same ship as DWT, GT, NT, LWT ect., Visit: Shipbuilding Knowledge A-Z for more free topics on shipbuilding An ocean ship may have different gross tonnage, depending on which country’s rules were used in determining the weight. Below is a good explanation on just what the tonnages for ships really are. TONNAGE (DWT, Displacement, Lightweight) Lightweight (LWT, LDT or LWDT) Basically the weight of the ship itself with no cargo, stores etc. Used widely at the time vessels are negotiating for scrap … Continue reading SHIP TONNAGE AND HYBRID MEASUREMENT
EDUCTOR AND EJECTOR – in shipbuilding, industrial (How to distinguish, calculation, selection, and purchasing)
At the beginning, there’s no need to fret over the differences that the different is in the motive fluid: An ejector uses a gas phase motive, usually steam or air. An eductor uses a liquid phase motive, usually water. Eductors/Ejectors … Continue reading EDUCTOR AND EJECTOR – in shipbuilding, industrial (How to distinguish, calculation, selection, and purchasing)
FLOW METER AND ORIFICE PLATE
In this chapter, i’d like to introduce about the most common device used for measuring flow rate – Orifice Plate. Visit: Shipbuilding Knowledge A-Z for more free topics on shipbuilding or Mechanical and Piping Advanced Knowledge in O&G EPCIC for Mechanical … Continue reading FLOW METER AND ORIFICE PLATE
Protected: Ship structure opening and their affection to structure integrity.
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X-BOW/STERN: Beyond the Conventional
One such change which made a splash in the maritime industry was the introduction of X-bow by the Norwegian Ulstein Group. Since the inception of their first ship M/V Bourbon Orca in 2005 several other ship building yards/companies have used their design. The X-bow comprises of a backward sloping bow starting at the extreme front of the vessel. This results in a continuous and smooth bow shape as shown below. Designing such a vessel involves proper weight distribution in the forward region which allows for submission and sharper bow shape. Increased volume up front WITH SLOWLY INCREASE BUOYANCY FORCE allows … Continue reading X-BOW/STERN: Beyond the Conventional
HULL TANK STRUCTURE/AIR/HOSE TEST
GENERAL: “Test procedures are to confirm the water-tightness of tanks and watertight boundaries, the structural adequacy of tanks and the weather-tightness of structures/shipboard outfitting.” THERE’RE TWO TYPE OF TEST 1- Structure test Structural Testing is a test to verify the structural adequacy of the construction of the tank (hydro static test) Structural testing may be carried out after the vessel is launched, some shipyard, they can be done in dry-dock. Visit: Shipbuilding Knowledge A-Z for more free topics on shipbuilding 2-Air leak test Leak Testing is a test to verify the tightness of the boundary (air testing, compressed air fillet weld testing, … Continue reading HULL TANK STRUCTURE/AIR/HOSE TEST
PIPING HYDRO-STATIC TEST COMPREHENSION
Two types “Shop test and After installation test” First, the hydro-static test of spool at Workshop is prefer to check the quality or strength of Welding joints, integral fittings and confirm whether it can satisfy the rule/standards requirement. TEST PRESSURE (Tp)= 1.5 DESIGN PRESSURE (Dp) “But we can not do final all spools at workshop and just bring on-board for assembly because there’re many Field Joints waiting you ahead. Depend on the flexibility of Rule/Spec, the low pressure pipe’s field joints can be tested under max.working pressure” Second, in ideal condition, no more welding joints on-board, the Leak test will be … Continue reading PIPING HYDRO-STATIC TEST COMPREHENSION
2nd-Order Linear Differential Equations (2ndLDE)
2nd-Order Linear Differential Equations – 2ndLDE A differential equation (DE) is an equation involving a function f(x) and its derivatives (x). (Phương trình Vi Phân tuyến tính cấp 2 – Vietnamese. Phương trình) Phương trình vi phân là 1 phương trình chứa biến độc lập x, hàm cần tìm là y = f (x) và các phương trình chứa biến x như P(x) Q(x) và các cấp đạo hàm của nó. Let’s forget what you have learned about Math during university 🙂 In Mechanical/Electrical engineering and Rotating equipment, the 2ndLDE is the most application in calculation of vibration, oscillation and circuit. Through this chapter, you … Continue reading 2nd-Order Linear Differential Equations (2ndLDE)
AMARINE 