What is the Difference between Code, Standard and Specification?

March 17, 2018December 20, 2019 Thanh ( QC ) Nguyen Le

The difference between Code, Standard and Specification is very important. What is Standard? Follow TWI: Below maybe easy understand: Standard can define as a set of technical definitions and guidelines – or simply a “how to” instructions for designers and manufacturers. It gives all the necessary requirements for the product, service, and operation. A designer will use the standard to design the product, and a manufacturer will use the standard for the manufacturing of the product. Standard serves as a common language for defining quality and establishing safety criteria for the product. ASTM, API, ISO are some examples of the standard. ASTM has more than … Continue reading What is the Difference between Code, Standard and Specification?

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Standard discharge connections for Piping ( shore connection flange )

March 17, 2018 Thanh ( QC ) Nguyen Le

We will summary the standard discharge connection for some piping system on ship, also called by Shore connection flange. The international shore connection is a universal hose connection that is to be provided on all ships as per the IMO SOLAS requirement. The purpose of the International Shore Coupling is to keep a standby hose attachment to get a connection from shore or from other ships for shipboard firefighting, in case there is a total failure of pumps onboard. The information is taken from MARPOL 73/78 1) Sewage system: For example: 2) Fireman system: The international shore coupling SOLAS requirement under Chapter II-2, regulation … Continue reading Standard discharge connections for Piping ( shore connection flange )

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Pressure gauge installation requirement!

March 17, 2018 Thanh ( QC ) Nguyen Le

Regarding to pressure gauge installation, it need to be follow as below: An Isolation valve for maintenance purpose ( can remove without impairing the pressure system’s integrity ) 2. The pressure gauge installed with vertical position is better than horizontal position: + Below pictures is example for wrong installation pressure gauge: 3. To be vented as vendor’s instruction: Document for refer: + WINTERS INSTRUMENTS + WIKA Alexander Wiegand SE & Co. KG Continue reading Pressure gauge installation requirement!

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How to take the welding parameters during make WPS / monitor welding performance?

March 17, 2018 Thanh ( QC ) Nguyen Le

To confirm that a weld has been made to specification: For arc welding the main parameters are as follows: Welding current Arc voltage Travel speed The other parameters which may be measured and recorded are as follows: Wire feed speed (for MIG/MAG) and other processes with a filler wire Gas flow rate (shielding, backing and plasma) Temperature (pre-heat, inter-pass and post-weld heat treatment) Some of these instruments allow the length of the weld to be input so that arc energy (kJ/mm) can be calculated. When measuring voltage and current it is important to do so correctly. + Although current can be … Continue reading How to take the welding parameters during make WPS / monitor welding performance?

CSWIP 3.0/3.1/3.2, WELDING2 Comments

CSWIP 3.1: What is OCV ( Open Circuit Voltage ) in welding power source?

December 2, 2017June 17, 2021 Thanh ( QC ) Nguyen Le

In this topic, we will talk about OCV in the welding power source. We need to solve some questions to clear this topic OR additional references on the below topics: Click here: What is OCV Open Circuit Voltage Maximum value … Continue reading CSWIP 3.1: What is OCV ( Open Circuit Voltage ) in welding power source?

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Thread of Bolts – Basic Knowledge

November 27, 2017November 27, 2017 Thanh ( QC ) Nguyen Le

When checking Bolt material coming, do you have feeling lose in the forest of BOLT & THEARD? We will help you to identify them accordingly via this topic! It has internal thread & external thread, can call male & female also. 1) Thread direction: The helix of a thread can twist in two possible directions.: left hand & right hand. 2) Technical terms of thread: Type of thread: Pitch / TPI ( thread per inch ): – The pitch is the distance from the top of one thread to the next in mm. – TPI (Threads per inch) is used by … Continue reading Thread of Bolts – Basic Knowledge

CSWIP 3.0/3.1/3.2, WELDING9 Comments

CSWIP 3.1: Question with Answer and Explanation – Part 20

November 27, 2017October 24, 2021 Thanh ( QC ) Nguyen Le

CSWIP 3.1 QUESTION AND ANSWER SERIES 1) A solid inclusion in a welder may be: Entrapped slag. (answer) Entrapped gas. Lack of inter-run fusion. None of the above. This is “solid” not gas! 2) Which is the following is a planar imperfection? Lack of sidewall fusion. (answer) Slag inclusion. Linear porosity. Root concavity. 3) For fillet welds it is normal practice in the UK and USA measure: Throat thickness. Leg lengths. ( answer ) Penetration depths. Both 1 and 3. Measure “Leg lengths” is easy checking on site. 4) Heavy porosity on the surface of some MMA welds made on … Continue reading CSWIP 3.1: Question with Answer and Explanation – Part 20

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CSWIP 3.1: Question with Answer and Explanation – Part 19

November 27, 2017August 30, 2019 Thanh ( QC ) Nguyen Le

CSWIP 3.1 QUESTION AND ANSWER SERIES CSWIP 3.1: Question with Answer and Explanation – Part 1 CSWIP 3.1: Question with Answer and Explanation – Part 2 CSWIP 3.1: Question with Answer and Explanation – Part 3 CSWIP 3.1: Question with Answer and Explanation – Part 4 CSWIP 3.1: Question with Answer and Explanation – Part 5 CSWIP 3.1: Question with Answer and Explanation – Part 6 CSWIP 3.1: Question with Answer and Explanation – Part 7 CSWIP 3.1: Question with Answer and Explanation – Part 8 CSWIP 3.1: Question with Answer and Explanation – Part 9 CSWIP 3.1: Question with … Continue reading CSWIP 3.1: Question with Answer and Explanation – Part 19

CSWIP 3.0/3.1/3.2, WELDING1 Comment