There is no excerpt because this is a protected post. Continue reading Protected: Propeller System: Shaft seal ( Stern Tube seal ) Inspection Notes on (Wear-down, Alignment, L/O lines, Seals, contact, leak test, and installation tolerance)
Continue: 7. Non Destructive Test: base on rule, % welding joint need to do NDT will be choosen. For ex: (1) Apply at least 10% of random RT to butt joint based on the class rule. (Choose RT point upon the decision of QM) (2) Apply 100% of random RT to stern cargo line 8. Pipe Covering / Protection (1) After the inspection of pipe at shop and before the coating process, do the covering to the tip of the pipe based on sealing rule. This can protect the pipe from foreign substance influx. (2) After the coating … Continue reading Stainless Steel Pipe Inspection Notes!- Part 2
Range of Application This guideline applies to stainless steel piping work during the fabricate & installation on board. Purpose Stainless steel pipe is widely used for its strength against low temperature and corrosion, and it is mainly used for low-temperature and chemical products. To maintain these characteristics, special management is required in the process of storage, assembly, welding, and post-processing. The purpose of this guideline is to offer standardized working methods to maintain the proper quality of piping system. Definition Sus pipe is composed of austenite and it is extremely durable against low / cryogenic temperature. Cr₂O₃ is formed on … Continue reading Stainless Steel Pipe Inspection Notes!- Part 1
Range of Application This test is to clean pipes inside of M/E L.O serv’ system, M/E & G/E F.O serv’ system, stern tube L.O system, and hydraulic oil system. Purpose This test is to heat and pump flushing oil or system oil and circulate through pipes. Circulating through pipes removes substances such as rust, dust, slga and grit using filter installed inside. The test helps devices to clean themselves and protect from aging and damaging, and also to lengthen the span of life of the machines. Flushing Line and the General Fact 1) Stern Tube L.O System ⓐ Do disguised … Continue reading PIPE FLUSHING INSPECTION NOTES
Continue: PART 3 – Fake certificate: Why have the FAKE CERT? The Certified Mill Test Report is a tool used to ensure that received raw material matches the engineering and purchase order requirements. There are clear requirements for what should go on the certificate but every so often someone tries to produce a fake mill certificate to sell steel plates fraudulently. 2. How to identify a FAKE STEEL MTCS? A fake mill certificate is normally fairly easy to spot if you know what you are looking for. You can sent them an email asking to vendor to clarify this certificate. … Continue reading How to view the material certificate? – Part 3 ( Final part )
Continue: PART 2 – How to view the certificate??? We will take example for Mill cert’, other cert’ is same procedure. Mill cert: A Certified Mill Test Report (CMTR) is a quality assurance document generated by the raw material manufacturer and provided with the material to intermediate suppliers and ultimately to a finished goods manufacturer. Whether it’s called a CMTR, Mill Test Report (MTR), Mill Certification, Metallurgical Test Report, or similar name, this document provides the end user of the raw material verification that the material received matches the requirements of their order. CMTRs are also used to maintain traceability … Continue reading How to view the material certificate? – Part 2
Base on EN – 10204 ( version 2004 ) & EN – 10168 ( for steel products ): We will go to know about some points as below: Part 1 – Know about what type of certificate: PART 2 – How to view the certificate: PART 3 – Fake certificate EN10204 HISTORY: EN 10204 originally started off as DIN 50049 which was a German DIN standard specifying the test certificate requirements for metallic products. I. Part 1 – Know about what type of certificate: A. Scope: The EN-10204 specifies the different types of inspection documents supplied to the purchaser, in accordance with … Continue reading How to view the material certificate? – Part 1
We continue with remain one for Water hammer: 5. HOW CAN THE CONSEQUENCES OF WATER HAMMER BE AVOIDED? – STRONGER PIPES AND SUPPORTS: Long pipes are where water hammer problems are most likely. Making such pipes sufficiently strong to withstand water hammer pressures and forces is unlikely to be economic. Most pipes in good condition can withstand pressures well in excess of their design pressure for short periods of time. Given also the subtlety of the dynamics of pipe responses to transients it is often true that bursting the pipe is not the main concern of the pressure surge engineer. … Continue reading Water hammer in piping system ( Part 2 )
What is water hammer? Water hammer is a pressure surge or wave resulting when a fluid in motion is forced to stop or change the velocity. A water hammer commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe. It is also called hydraulic shock. A signifcant, nearly instantaneous pressure shock wave may be generated when a valve opens or closes too quickly, or when a pump starts with an empty discharge line or suddenly shuts down. This phenomenon is the result of the sudden change in velocity of the fluid … Continue reading Water hammer in piping system ( Part 1 )
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