CSWIP 3.1 WELDING PROCESSES
Key notes: General: Typical H.I from 1 – 3.5 kJ/mm Plastic state welding or Non-fusion welding CC or CV Polarity and Penetration ability Operation Factor vs Duty Cycle Affection of Torch Angle MMA: Typical OCV : 50-90V and Operation range : 20-40V Arc blow because of Magnetic force (DC) –> Prevent by using AC Run Out Length (ROL) –> For measuring the welding Speed TIG: Typical OCV : 50-90V and Operation range : 20-40V Filler rod – consumables vs Electrode – nonconsumable HF – high frequency Arc starting can Damage the equipments AC used for Al and Mg (Because of Best Cleaning … Continue reading CSWIP 3.1 WELDING PROCESSES
CSWIP 3.1 WELDING CONSUMABLES
Key note: Storage Condition Dew point of Consumable Gas: – 60 Deg Filler material must be stored in an area with controlled temperature and humidity. MMA Consumables Core wire made by Rimming steel Weld properties controlled by covering Flux Silicon (De-oxidizer) added to Flux to avoid the Porosity inhibited by rimming steel Flux types comparison: Flux types identification: Impact test energy as per EN ISO 2560: Tensile strength or Yield Strength SS – ELECTRODE SMALLER THAN CS ELECTRODE BECAUSE OF LOWER ELECTRIC CONDUCTIVITY. TIG Consumables EB INSERT (SEE TERMS AND DEFINITIONS) Nitrogen will not be used for Ni,Ni-alloys and Mild … Continue reading CSWIP 3.1 WELDING CONSUMABLES
CSWIP 3.1 WELDING SYMBOLS
Key notes: Identification – – – – – – -(ISO)- – – – – – – / Reference lines Identification line (ISO) can be omitted in asymmetric joint Staggering symbol AWS vs ISO Peripheral (ISO) or Well all around (AWS) Partial penetration weld, “S” “z”– Leg size or “a” – Throat thickness Process identification between AWS and ISO Continue reading CSWIP 3.1 WELDING SYMBOLS
CSWIP 3.1 TERMS & DEFINITION
Key notes: TERMS: Brazing (A) vs Braze welding (B) Weld Zone JOINT TYPE: Autogenous welding Spot weld Lap joint (Electric resistance welding) WELDING PREPARATION: EB insert (Backing ring) vs Backing strips General Root Gap Asymmetric preparation WELDING TYPE: Compound weld and Special Groove (Bevel) weld in T-joint WELDING POSITIONS: Test Position vs Qualifying Position Continue reading CSWIP 3.1 TERMS & DEFINITION
Main Engine Shaft Alignment – Comprehension (Check conditions/ items/ tolerance/ docking/ undocking/ bearing loads or reactions/ jackup curve understanding)
What is shaft alignment condition? “A static condition observed at the bearings supporting the propulsion shafts.” The basic procedure for determining vertical alignment of shafting and gears is to calculate, for the cold condition at time of aligning, a shape … Continue reading Main Engine Shaft Alignment – Comprehension (Check conditions/ items/ tolerance/ docking/ undocking/ bearing loads or reactions/ jackup curve understanding)
Fire Integrity On Ship.
Check the Password and Visit: Protected: Fire Integrity On Ship (Full example of how to select the grades on Zones, division on a ship or topsite) Continue reading Fire Integrity On Ship.
Protected: Rotating Machine Chocking – (Types of chock, contact test, tolerance, and inspection)
There is no excerpt because this is a protected post. Continue reading Protected: Rotating Machine Chocking – (Types of chock, contact test, tolerance, and inspection)
General about Marine Fuels!
Marine fossil fuels: The majority of the existing and proposed marine fuels are of the same origin. The same fuel composition may be available from renewable sources (e.g. natural gas – bio gas, methane…) but here only the most common are taken into consideration. + How is a crude oil feld formed? The generally accepted theory is that crude oil was formed over millions of years from the remains of plants and animals that lived in the seas. As they died, they sank to the seabed, were buried with sand and mud, and became an organic-rich layer. Steadily, these layers … Continue reading General about Marine Fuels!
Hazardous Areas Classification on Ship (Examples and explanation by Rules)
It’s will be a long and confusing contents through all the requirement from IEC/IECEx as well as IMO (SOLAS, IBC, IGC codes). Thus, i’ll make it as short as possible to make the article with key knowledge & understanding. FIRST … Continue reading Hazardous Areas Classification on Ship (Examples and explanation by Rules)
AMARINE 