Author: Thanh ( QC ) Nguyen Le

-M&P QC ( Quality control ) -Worked at Hyundai Vinashin -Working at Triyards
PIPING5 Comments

Flow direction of Valve – Part 5 ( Butterfly valve )

Thanh ( QC ) Nguyen Le

For this topic, we are introducing about valve direction of various valve types as below: + Check valve : Flow direction of Valve – Part 1 (CHECK VALVE) + Ball valve: Flow direction of Valve – Part 2 (BALL VALVE) + Globe valve: Flow direction of Valve – Part 3 ( Globe valve ) and Flow direction of Valve – Part 4 (GLOBE VALVE) continue + Butterfly valve: Flow direction of Valve – Part 5 (BUTTERFLY VALVE) 1.A Butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow. A butterfly valve has a disc which … Continue reading Flow direction of Valve – Part 5 ( Butterfly valve )

PIPING4 Comments

PIPE API 5L: PSL1 vs PSL2

Thanh ( QC ) Nguyen Le

API 5L Pipe general: API 5L pipes is used for conveying gas, water and oil either in the oil or natural gas industries. Line pipe can meet all requirement of high-pressure transmission pipeline for natural gas & petroleum, can be used in on-shore, off-shore oil & gas transmission. API 5L ~ American Petroleum Institute specification API 5L cover seamless or welded steel line pipe. The purpose of this specification is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries. Grade: Grades covered by this specification are A25, A, … Continue reading PIPE API 5L: PSL1 vs PSL2

WELDING3 Comments

WPS understanding – Part 2

Thanh ( QC ) Nguyen Le

We will continue for remain variable: Example WPS for refer: I. Filler metals: for user purpose – just follow & take correct welding consumable, filler metal. We need take note the below table to know what variable is essential ( any difference if it is essential, will not allow ). J. Position: K. Post weld heat treatment L. Preheat: M. Gas:  “Trailing” is generally given to the term where a trailing shield is used when using the GTAW process and most likely used for the welding of titanium, the trailing shield contains the shielding gas over the completed weld bead … Continue reading WPS understanding – Part 2

WELDING8 Comments

WPS Understanding – Part 1

Thanh ( QC ) Nguyen Le

Dear all, This topic we just introduce you How to read, understand & use a WPS ( welding procedure specification ). Example WPS for refer Some definitions you need understand before start it. What is WPS? is a written document that provides direction to the welder or welding operator for making production welds in accordance with code requirements. The completed WPS shall describe all the essential , non essential and when required supplementary essential variables for each welding process used in the WPS.   2. What is PQR ( procedure qualify record )? is a record of the weld data … Continue reading WPS Understanding – Part 1

Metallurgy1 Comment

ASM Handbooks – Intro

Thanh ( QC ) Nguyen Le

This topic just general about AMS containing for each Volume: The ASM Handbook® series contains peer-reviewed, trusted information in every area of materials specialization. The series is the industry’s best known and most comprehensive source of information on ferrous and nonferrous metals and materials technology and is packed with over 35,000 pages of articles, illustrations, tables, graphs, specifications and practical examples for today’s engineer. Volume 1A: Cast Iron Science and Technology (scheduled release: July 31, 2017) Volume 1: Properties and Selection: Irons, Steels, and High-Performance Alloys Volume 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials Volume 3: Alloy Phase … Continue reading ASM Handbooks – Intro