By Carlos F Molina
I am pleased to be back with you for this article. We are reviewing basic radiology for the 653 exam according to ASME V. This is following the radiology first article of this series
Hey. If you know apiexam.com, maybe you have realized that I try to make my articles following the exact order of the Body Of Knowledge. Did you notice then that something was lacking from the latter article? Yes… it was procedure demonstration. (more…)
By Carlos Molina
This time we are going to check radiographic testing for welds in new tanks, an introduction. The BOK for the API 653 exam says:
2. Radiographic Examination:
The inspector should be familiar with and understand:
1. The Scope of Article 2 and general requirements [of ASME V].
2. The rules for radiography as typically applied on butt welded AST horizontal and vertical seams such as, but not limited to:
required marking type.
selection.
number, and placement of IQIs.
allowable density control of backscatter radiation
location markers
3. Records
I will try to simplify this subject as much as posible for the people who is studying for the API 653 exam. (more…)
By Carlos F Molina
Today´s artice is about hydrostatic testing in tanks. In my workplace, it became a common ocurrence for the people to say that “the hydrostatic test in a tank is just a tightness test”. Some gals say that “the most important thing to do with hydrostatic testing is settlement measurement”. This illustrates that not everybody understands hydrostatic testing fully.
In this article, we will see how the hydrostatic test is made for various types of tanks and which parts of a tank are evaluated with an hydrostatic test. (more…)
By Carlos F Molina
Hi. This is the final installment of these series of articles containing the 27 variables that a SMAW WPS should contain (other proccesses have different essential variables). Here we will consider variables 19 to 27 that should be given a value in a WPS, according to ASME IX. This is written for the basic level, for the person that is studying for the API 653 exam. (more…)
By Carlos F Molina
Hi again. I hope you have found my last post useful. Here is the continuation of it: variables 13 to 18 that should be given a value in a WPS, according to ASME IX.
QW-405. POSITIONS
13. QW-405.1 The addition of other welding positions than those already qualified. see QW-120, QW-130, QW-203, and Qw-303.
A common mistake made by beginners is to think that the position chosen for procedure qualification limits the position of the production weld. In fact, qualifying a procedure in any welding position approves all positions providing no impact tests are required. Weld position is a non-essential variable.
By Carlos F Molina
Hi again, dear readers. I am greeting you after a long hiatus in my writing, in relation with my work, the caring after my baby boy and my health. Anyway, I am back again and today I will be writing further about ASME IX, for you to better understand WPSs and PQRs. Remember, my post are oriented for the people that will take the API 653 certification exam. (more…)