By Carlos F Molina

HOW TO RECORD CONSUMABLES  DATA IN A PAINTING PROJECT

As any person in a project knows, consumables control is difficult, and critical. And while there are some calculators and guides in the internet and literature for things like control of welding and safety consumables, there is not much for painting consumables. In fact, a google search for “abrasive performance” has little results, and a search for “paint control” yields almost no result. For people in charge of paint control, this can be a nightmare.

I haven´t found any paint control strategy on the web. I am sharing one I have used before with success. It is mainly useful in large surfaces that are going to be painted by the airless spraying method.
I am aware this might not be the only nor the best approach there is to the subject. But maybe it will serve as a catalyst for debate in the subject. I am open to criticism. I know there are many experts in the field already. And finally, this is not my creation only, but the work of others put together as an overall strategy.

NOTE 1: In this article, I use the word paint for a) the liquid in the buckets before applied b) the act of painting, and I use the word coating when referring to the product applied and already dry over the substrate.
NOTE 2: In this article, I use the example of a project where you have to paint the inside of  tank with a single coating and the exterior with a 2-coat arrangement.
NOTE 3: In this article, I assume all paints are 2-part (a resin and a hardener). However, it serves with single component paints.
NOTE 4. In this article, I talk about the possibility of being untrue to specifications of a paint job in very small areas. Take the advice at your own risk. (Remember: any standard is a form of risk reduction, so your professional criteria should always be used.)
NOTE 5. Finally, none of this information can be used to blame me later about anything. This is not a contractual document anyways, but only an strategy. Keep reading

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By Carlos Molina

To download 52 questions for your own study, based in SOIL and CAUSTIC corrosion in the API 571 RP, click here

Both DM ares listed in the API 571 RP under the “Uniform or Localized Loss of Thickness” Keep reading

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By Carlos F Molina

Liquid penetrant examination is a NDE technique used many situations. It is an effective means for detecting discontinuities which are open to the surface of nonporous metals and other materials. Typical discontinuities detectable by this method are cracks, seams, laps, cold shuts, laminations, and porosity. In fillet welds of big size (you define big size), it can be used in several stages to make an approximation to a volumetric NDE. It is better used if applied to the root pass of containment welds.

The Body of Knowledge for the API 653 exam (there is a new BOK here) says the following:

body-of-knowledge-article-6 Keep reading

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Uses of ultrasound in tanks

By Carlos F Molina

Hi. Following two months and a half of a new job in Panama, I haven´t been so atentive to my website. I am again working for a contractor, meaning I have almost no time at all to update this site. I am usually void of energy because of all of the work that needs to be done.  I hope that changes in the near future. By now, I am trying to retake writing in apiexam.com and to really commit to an schedule. Even when I didn´t write in a long time, the number of people that found value in my content grew (I have 255 suscribers now) in the past 2 and a half months.

Last time, we talked about Ultrasound according to Article 23 Ultrasonic Standards, Section SE–797, only things related to the Body Of Knowledge. This time we will review the use of ultrasound in tanks.

INTRODUCTION

Ultrasonic testing, I think, is going to replace RT as a mean of inspecting welded joints in tanks, because of its many advantages, like reducing hazards and downtime associated with radiography.

Keep reading

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By Carlos F Molina

In the Body Of Knowledge for the API 653 exam, Ultrasonic Testing is one of the smallest parts that needs to be studied. This is what the Body Of Knowledge says you need to get:

E. Article 23, Ultrasonic Standards, Section SE–797 only – Standard practice for measuring thickness by manual ultrasonic pulse-echo contact method:
The inspector should be familiar with and understand;
1. The Scope of Article 23, Section SE-797,
2. The general rules for applying and using the Ultrasonic method
3. The specific procedures for Ultrasonic thickness measurement as contained in paragraph 7.

Keep reading

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By Carlos F Molina

Here I present the resources in my website: the Q&A documents and a simulator.

Please download 47 more Q&a in the Api 653  series.

HOW TO USE THE Q&A LISTS

The questions of the Q&A list were extracted from the standards by me, or remembered by me or other students that took the exam before. The format is a Q&A one, different from the multiple choice question format from other courses I have seen online. I prefer this method because it takes away all the clutter that leads to confusion when treating these standards. I advise you to copy these questions (maybe you will have to actively copy and paste the Q&A sets in word or excel) and paste it in a spaced repetition software like Anki or Supermemo, as the Q&A format allows, and start studying right away.  Please edit the questions yourself looking to the references if you have difficulty remembering any of them. When days pass by, you will see who you remember all of the information with no problem.

Keep reading

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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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ASME V Radiology part 2

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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ASME V Radiology Introduction

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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