Examination vs. Testing

[apiguy]

Recently, I was asked to give a presentation on the difference between examination and testing as it applies to the B31.3 Process Piping Code. Here is my understanding in a nutshell. Please review and provide feedback.

"WHAT IS THE DIFFERENCE BETWEEN EXAMINATION AND TESTNG"

B31.3 defines examination as a quality control function performed by the manufacturer, fabricator, or erector. Examination is intended to cover the suitability for service of all components and workmanship.

There are four basic levels of examination that apply to each method; 100 % examination, random examiation , spot examination, random spot examination. Typical methods of examination found in B31.3 are Visual examination, Magnetic Particle examination, Liquid Penetrant examination, Radiographic examination and Ultrasonic examination, and the In-Process examination which is function of the visual examination method. 100 % examination is defined as "complete examination of all of a specified kind of item in a designated lot." Random examination is defined as "a complete examination of a percentage of a specified kind of item in a designated lot of piping. Spot examination is defined as "a specified partial examination of each of a specified kind of item in a designated lot of piping". Random Spot examination is defined as "a specified partial examination of a percentage of a specified kind of item in a designated lot of piping".

Testing, as described in B31.3, is a measure of the piping system "tightness" or ability to contain fluid.
B31.3 specifies that a hydrostatic test be performed to ensure tightness. There are exceptions to this rule which allow for different test media such as air (pneumatic test) or a combination of both.


If anyone has any other helpful information, I would appreciate a post here. This post is duplicated in another category as well.

Thanks again for your help.

Richard Schram
Mechanical Integrity Specialist
Pharmacia Global Supply Arecibo-P. Rico

 

[Norphlet]

For your references, APIGUY

1. Define inspection, examination, and testing according to Chapter VI, B31.3, for your listeners.

2. Add table 341.3.2 and interprete your acceptance criteria.

3. Record responsibility (346.2) and retention of records (346.3), and aslo your company practices for the record.

Norphlet

 

[apiguy]

Thanks Norphlet,

I have included the acceptance criteria chart and required record keeping in the formal presentation, I just wanted to be sure my thoughts were along the same lines as those of my peers.

As always, the members of these forums continue to provide much needed guidance and support.

Thanks again to all...

Richard Schram
Mechanical Integrity Specialist
Pharmacia Global Supply Arecibo-P. Rico