API 570 Quiz (ASME 31.3 – Pressure Testing)

If you don’t know how API 570 Certification scheme, See API 570 Certification Instruction PRESSURE TESTINGThe inspector should be able to:a) Demonstrate knowledge concerning hydrostatic leak testing (ASME B31.3 Section 345.4)b) Demonstrate knowledge concerning pneumatic leak testing (ASME B31.3 Section 345.5)c) … Continue reading API 570 Quiz (ASME 31.3 – Pressure Testing)

API 570 Quiz (ASME 31.3 – Quality Factor of Weld-joint and Casting)

In this very first and priority topic, we will try one by one of the Open/Close questions on Module ASME 31.3 – Quality Factor as a part of in-the-exam API 570 Body of knowledge (BOK) If you don’t know how API 570 Certification scheme, … Continue reading API 570 Quiz (ASME 31.3 – Quality Factor of Weld-joint and Casting)

Guide for selecting Gasket type

The Factors to consider when selecting a gasket Operating temperature and pressure, pipe size, temperature cycle, cost, chemical composition of fluid, fire resistance, radiation, etc In general of application, please use Pressure – Temperature chart as below for understanding the capability of each type of gasket. Sheet Gasket (Rubber gasket, Non-asbestos gasket, PTFE gasket, flexible graphite gasket) Rubber gasket is common with black color, but it is different. Compressed Synthetic Fiber Gasket (e.g. non asbestos or asbestos free) PTFE (Poly Tetra Flour Ethylene) Gasket Type: Virgin(Pure), Filled (Compressed Synthetic), Micro-cellular (Closed or Expanded), with thin metal reinforcement. Flexible Graphite Gasket … Continue reading Guide for selecting Gasket type

HDPE Piping (Theory, Features, Heat Fusion, etc.)

1. What is HDPE? High Density Polyethylene Synthetic resin prepared by polymerizing ethylene One of the general-purpose plastics used a lot in everyday life 2. Features and Application 1) Features: excellent weather resistance, environmental stress cracking resistance, water pressure resistance and workability. 2) Use: General sewer pipe (firefighters in domestic apartments, etc.-screw-in, plant UG-Heat Fusion) ※ Weather resistance: Withstands various climates. Difficulty rusting. ※  Environmental Stress Cracking Resistance 3. Heat Fusion Construction: Fusion Weld Machine = HDPE Welding Machine-Electrofusion Machine, etc.  Each company has a different name but the principle is similar. If the machine is installed according to the procedure, it will … Continue reading HDPE Piping (Theory, Features, Heat Fusion, etc.)