By Carlos F Molina

This is my last article about radiology in tanks for readers who are studying for the API 653 exam. We will see

  • Radiographic Technique
  • Placement of IQIs
  • Radiographic density

Keep reading

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By Carlos F Molina

In this article we will be talking more on the subject of radiology in the ASME V code

NOTE: This article is half of what originally was intended to be. It turns out that, as usual, good research takes a lot of time and as consequence, articles end up being longer and not reader-friendly.  So I trimmed out the info and I am resizing with the info needed by API 653 readers.

There is 1 characteristic of a good radiograph that you should control:

Keep reading

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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. Keep reading

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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. Keep reading

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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. Keep reading

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By Carlos F Molina

To professionals all around the industry, I am here to present you a problem. We have  shortage of personnel for our industry. The average age of a welder in the USA is 55; the wave of coming retirements will leave manufacturers at a disadvantage. The American Welding Society estimates that by 2020 there will be a shortage of 290,000 professionals, including inspectors, engineers, and teachers. “We’re dealing with a lost generation”, they say (link)

Keep reading

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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. Keep reading

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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

wps smaw 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.

Keep reading

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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. Keep reading

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By Carlos F Molina

One of the content areas that worked out best for me during my exam three years ago was welding. In the time I presented the exam, the number of questions was different from nowadays. From a total of 16 questions about welding, I got 15 right (nowadays they ask only 8). It helped me a lot knowing about welding.

The body of knowledge gives a broad guide of what will appear in the exam related to welding. It says the following:

The inspector should have the knowledge and skills required to review a Procedure Qualification Record and a Welding Procedure Specification or to answer questions requiring the same level of knowledge and skill. Questions covering the specific rules of Section IX will be limited in complexity and scope to the SMAW and SAW welding processes.
1. Questions will be based on:
a) No more than one process
b) Filler metals limited to one
c) Essential, non-essential, variables only will be covered
d) Number, type, and results of mechanical tests
e) Base metals limited to P1
f) Additional essential variables required by API-650 or API-653
2. The following are specifically excluded:
a) Dissimilar base metal joints
b) Supplemental powdered filler metals and consumable inserts
c) Special weld processes such as corrosion-resistant weld metal overlay, hard-facing overlay, and dissimilar
metal welds with buttering
d) Charpy impact requirements and supplementary essential variables
e) Any PQR and WPS included on the examination will not include heat treatment requirements.
[…….]

As you can see, some of the questions are based on ASME IX. With this in mind, I decide to put on some articles on successfully reading and reviewing a WPS and a WPQ. Let´s check an introduction. Keep reading

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