ASTM and ASME testing types and methods for metal pipes 1

[Musttamoni]

Dear all
I am looking to get idea about ASTM and ASME testing types and methods for metal pipes. And I will be thankful if you provide at least the names of the tests, which I will search for the procedures and methods of it

 

[pennpiper]

Maybe this will help:


Non-Destructive Examination
By: Abhijit Nagarale

Non-Destructive Examination (NDE): NDE is the use of test methods to examine an object, material or system without impairing its future usefulness. Non-destructive testing is often required to verify the quality of a product or a system.

Commonly used techniques are:

AET - Acoustic Emission Testing
ART - Acoustic Resonance Testing
ET - Electromagnetic Testing
IRT - Infrared Testing
LT - Leak Testing
MT - Magnetic Particle Testing
PT - Dye Penetrant Testing
RT - Radiographic Testing
UT - Ultrasonic Testing
VT - Visual Testing (VI - Visual Examination)

It should be noted here that even though “T” or “Testing” is used it is technically incorrect. Testing results in the destruction of a welded part such as the bending of a weld coupon to see if it fails. That technique requires the cutting of the total weld into bars and placing then, one at a time in a press to form a “U” bend right at the weld.

The proper terminology is “NDE” – Non-Destructive Examination. You just examine the weld and do no harm to the finished product unless you find a totally unacceptable and un-repairable weld.

Examination methods and their definitions:

AET - Acoustic Emission Testing,
Acoustic Emission Examination takes advantage of the sharp sound that PCCP emits when it breaks or slips to identify areas of active distress within a construction. AET can be used to verify the structural integrity of pressure vessels, spheres, high temperature reactors and piping, coke drums, above ground storage tanks, cryogenic storage tanks and more. The inspection is executed externally and shut-down of the process may often not be necessary.

ART - Acoustic Resonance Testing,
Acoustic sonic and ultrasonic resonance analysis is a non-destructive examination technique that allows testing of a wide range of test objects. Typical detecting faults are cracks, cavities, detached layers, material inconsistencies, hardness deviation in materials. After an impact a specimen will vibrate in certain characteristic modes and frequencies that can be measured by a microphone or laser vibrometer.

ET - Electromagnetic Testing,
Electromagnetic Examination is the process of inducing electric currents and/or magnetic fields inside a test object and observing the response. A defect in the test object may be detected where electromagnetic interference creates a measurable response.

IRT - Infrared Testing,
Infrared Examination is a technique that uses thermograph, an infrared imaging and measurement camera, to see and measure infrared energy emitted from an object. Can be used to heat development, lack of insulation, thin walls in constructions and more.

LT - Leak Testing,
Leak Test Examination techniques used to detect and locate leaks in pressure containment parts, pressure vessels, and structures. Leaks can be detected by using liquid and gas penetrant techniques, electronic listening devices, pressure gauge measurements or soap-bubble tests.

MT - Magnetic Particle Testing,
Magnetic Particle Examination is accomplished by inducing a magnetic field in a ferromagnetic material and then dusting the surface with iron particles. The surface will produce magnetic poles and distort the magnetic field in such a way that the iron particles are attracted and concentrated making defects on the surface of the material visible.

PT - Dye Penetrant Testing,
The Dye Penetrant Examination can be used to locate discontinuities on material surfaces. A highly penetrating dye on the surface will enter discontinuities after a sufficient penetration time, and after removing the excess dye with a developing agent, the defects on the surface will be visible.

RT - Radiographic Testing,
Radiographic Examination can be used to detect internal defects in castings, welds or forgings by exposure the construction to x-ray or gamma ray radiation. Defects are detected by differences in radiation absorption in the material as seen on a shadow graph displayed on photographic film or a fluorescent screen.

UT - Ultrasonic Testing,
Ultrasonic Examination uses high frequency sound energy to conduct examinations and make measurements. Ultrasonic inspection can be used for flaw detection/evaluation, dimensional measurements, material characterization, and more.

VT - Visual Testing (VI - Visual Inspection),
Visual Examination is the most widely performed method for discovering bad welds and insuring a high level of weld quality. All welds should be examined before during and after each pass. If you can see it and it is wrong then there is no need for any of the other more costly methods.


Abhijit Nagarale is an Asst. Design Engineer-Piping Design with Jacobs Engineering India Pvt. Ltd. (Mumbai)



Sometimes its possible to do all the right things and still get bad results

 

[Musttamoni]

Thanks a lot dear

 

[EdStainless]

Existing specs for both welded and seamless tubular products use either ECT or UT for indication detection and either air-under-water (or differential pressure in some cases) or hydrostatic pressure testing as leak detection.
Hydro is the least sensitive of all four test methods, by a large margin.
In service many other test methods may be employed.

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P.E. Metallurgy, Plymouth Tube

 

[matschka]

I think you will be well served at

http://www.asnt.org

This stands for American Society of Nondestructive Testing.