ASME SECTION VIII – CALCULATION (Part I)
Q: Tuan IR. Mursyidi, i have a problem. How to score good grade in calculations? Do you have a solution? Mind to share with us? A: Thanks for asking. I understand, some of us having this problem. Some of us are not. But, it doesn’t mean that you have no problem at all especially when […]
MINIMUM DESIGN METAL TEMPERATURE (MDMT)
IMPACT TEST In any item of structural or pressure Equipment there is a need to avoid the occurrence of brittle fracture. Impact strength is measured using a Charpy or Izod test. Assume ALL Carbon and Low Allow Steels require impact test, EXCEPT: a. UG-20 b. UCS-66 (MDMT and Thickness) c. UHA 51 MINIMUM DESIGN METAL […]
JOINTS EFFICIENCY (E) AND TYPES OF JOINTS
WHAT IS JOINT EFFICIENCY E? a. It is a safety factor for welds. b. It is a compensation for possible weld defects. WHAT FACTORS AFFECT E? It is type of joint, location of joint and amount of RT. HOW DOES JOINT EFFICIENCY AFFECT t min? As E decreases, required thickness increase. HOW IS JOINT EFFICIENCY […]
CHAP V – FABRICATION, ASSEMBLY & ERECTION
WELDING RESPONSIBILITY Each employer is responsible for the welding done by the personnel of his organization and shall conduct the tests required to quality welding procedures and to quality and as necessary re-qualify welders and welding operators. WELDING QUALIFICATIONS Welders and welding operators must be qualified to ASME Section IX, except as modified by B31.3. […]
DIFFERENCE BETWEEN PIPING AND PIPELINE
When we talk about pipes, what is the first thing that comes to your mind? Of course, the first thing is about the physical shape of the pipe, which is usually long in size and it is made from iron and other materials. But, when it comes to pipelines, what are the things that come […]
WPS, PQR AND WELDER’S QUALIFICATION
Before we explain further, first of all we want you to know that, these 3 terms will be used a lot. So for that, you need to familiarize yourself with these terms as an initial preparation to become a qualified welder. The 3 terms are: WPQ – Welder Performance Qualification WPS – Welding Procedure Specification […]
CUI, ECSCC & ITS CONTRIBUTING FACTORS
Is this the first time you’ve heard of corrosion under insulation (CUI) and stress corrosion cracking caused by external chloride (ECSSS)? If not, how much do you understand about them? What are the contributing factors for both? Let’s read this brief discussion of CUI and ECSCC. The generally recognized definition for corrosion under insulation for […]
4.3.3 CORROSION UNDER INSULATION (CUI)
Description Of Damage Corrosion of piping, pressure vessels and structural components resulting from water trapped under insulation or fireproofing. The water can come from rain water, leakage, deluge system water, wash water, or sweating from temperature cycling or low temperature operation such as refrigeration units. Affected Materials 1. Carbon steel2. Low Alloy steels3. 300 Series […]
WELDING IMPERFECTION (BS EN ISO 6520)
Apa itu welding imperfection? Dan apa perkara yang anda perlu ketahui tentangnya? Welding imperfection adalah flaw atau kecacatan yang boleh menjejaskan fungsi item tersebut. Ini boleh terjadi pada weld metal atau parent metal berdekatan. Welding imperfection dikelaskan mengikut ISO 6520 manakala had yang boleh diterima, ditentukan dalam ISO 5817 dan ISO 10042. Untuk itu, jom […]
SCOPE OF API 510 PRESSURE VESSEL INSPECTION CODE
Inside API 510, Pressure Vessel Inspection Code: Maintenance Inspection, Rating, Repair and Alteration, 10th Edition, May 2014 with Addendum 1, May 2017 has stated: 1.1.1 Coverage This inspection code covers the in-service inspection, repair, alteration and re-rating activities for pressure vessels and the pressure-relieving devices protecting these vessels. This inspection code applies to all hydrocarbon […]