ASNT Level 3 Thermal Infrared Testing Course
ASNT Level 3 Thermal Infrared Testing Course Fees 450 $ | ASNT Level 3 Thermal Infrared Testing Course Exam Fees To be informed | ASNT Level 3 Thermal Infrared Testing Course Duration 20 Days | ASNT Level 3 Thermal Infrared Testing Course Location Muscat
Management of Infrared and Thermnal Testing
Temperature is frequently considered the key to successful plant maintenance and is one of the most measured quantities in industrial process control. Temperature and thermal behavior of plant machinery, electrical equipment and materials in process are the factors most critical in the maintenance of operations as well as the manufacturing process.
ASNT Level 3 Thermal Infrared Testing Course covers Infrared sensors have become less expensive and more reliable. For this reason noncontact measurement using infrared sensors has become increasingly desirable. Now, with the ever developing computer hardware and software, computer aided predictive
maintenance and full image thermal control of products and process are being made possible.
Implementing a comprehensive program can reduce costly equipment outages. Infrared thermography, a fundamental component of such programs, uses nonintrusive techniques to monitor the operating condition of equipment and components.
One of the primary uses of infrared thermography has been in the electrical area. (See Fig. 9.) 'A'hen the resistance is high, the power dissipated will be high for a given current intensity. This creates the
lzot spots that are seen through the infrared imagers. Typical problems in this category include loose and/or corroded connections, undersized electrical conductors and open individual strands of
a multiple stranded conductor. A special case of this category is phase imbalance.
The causes for a phase imbalance are numerous but all involve the situation where the current in one phase circuit is significantly different from that of the other phase(s). The difference in the higher current phase will he seen because of the elevated temperature. The individual phase currents should he
measured to verify this.
Hot spots may appear not from the primary current but from the induced currents. This is often the case near the main electrical generator. Hot spots can appear in unlikely places such as the supporting structure of the generator. Not all hot spots are a problem, however. In the case of the steel structure, the hot spots may be where the electrical fields from the generator coincide. Hot spots are also common on motors. In both cases the condition should be well documented and trended for future evaluation.
Test Procedures for Infrared and Thermal Testing
The conduct of facility operations (in-house or contracted) should be performed in accordance ·with specific instructions from an expert. This is typically accomplished using written instructions in the form of a technical procedure. In many cases codes and specifications will require the use of _a technical procedure to perform required tests.
ASNT Level 3 Thermal Infrared Testing Course covers the procedure process can take many forms, including general instructions that address only major aspects of test techniques. Or a procedure may be written as a step-by-step process requring a supervisor's initial or signature after each step.
Test Specifications for Infrared and Thermal Testing
A thermographic specification must anticipate a number of issues that arise during testing.
Test Condition Requirements
I. The heat stimulation requirements (energy and duration) to detect the target discontinuities must be determined.
II.The required heating rate depends on the thermal and surface properties of the subject, on the heat transfer process and efficiency and on equipment characteristics such as speed and sensitivity.
Standards and Specifications for Infrared and Thermal Testing
Standards have undergone a process of peer review in industry and can be invoked with the force of law by contract or by government regulation. In contrast, a specification represents an employer's instructions to employees and is specific to a contract or work place. Specifications may form the basis of standards through a review process. Standards and specifications exist in three basic areas: equipment, processes and personnel.
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