28 Questions
Who is responsible for developing the ultrasonic testing application technique and approving the testing procedure?
NDT Level III personnel
Who is authorized to calibrate equipment and interpret the ultrasonic test results?
Level II or III certified personnel
Who is responsible for performing the ultrasonic test and evaluating the results?
NDT Level II or III personnel
When is the company required to demonstrate the application of the ultrasonic procedure and systems?
Prior to final written approval
Which essential variables in welding require requalification of the welding operator?
Welding process, direction, and filler metal type
Which testing records must be maintained for qualified operators?
Records of tests required and detailed results for each test
Which testing method shall be in accordance with 11.1?
Radiographic testing
What process should be used for automatic welding without filler metal additions?
Flash butt-welding process
What must be established and qualified before production welding is started?
Detailed welding procedure specification
Which changes require requalification of the welding operator?
Wall thickness and joint design
In accordance with which section should acceptance standards for non-destructive testing (NDT) be?
Section 9
Which method should be used for ultrasonic testing?
Pulse-echo testing
What is required for welding operators to be qualified?
Producing an acceptable weld using the qualified welding procedure
What is required to be maintained for qualified operators?
Records of tests required and detailed results for each test
Which process should be used for automatic welding without filler metal additions?
Gas tungsten arc welding process
What must be done before production welding is started?
Establishment and qualification of a detailed welding procedure specification
What is the purpose of destructive testing of the weld sample?
To confirm results of ultrasonic testing
What is the basis for manual ultrasonic testing sensitivity?
Reference standard with specific requirements for notch depth and dimensions
What is used for calibration reflectors in automatic ultrasonic testing?
Flat bottom holes machined into the pipe
What is installed at the weld centerline position for each fill pass required by the welding procedure?
Planar reflectors or flat bottom holes
What technique is carried out to determine actual full skip distance and refracted angle?
Transfer technique using probes of the same nominal angles and frequencies
What type of testing is performed before ultrasonic testing on both sides of the weld?
Compression wave testing of parent material
What should the second backwall echo from the reference standard be adjusted to in manual compression wave testing of parent material?
At least 80% of full screen height
What is the purpose of ultrasonic testing procedure for production welding?
To locate imperfections and defects, and determine weld acceptability
What is documented and compared with radiographs during the ultrasonic testing procedure?
Results
What may be required if there are differences in detection results during ultrasonic testing?
Destructive testing of the weld sample
What requires additional demonstration welds if there are changes in wall thickness, bevel design, acoustic velocity, and welding process?
Ultrasonic testing procedure
What is the basis for destructive testing of the weld sample?
To confirm results of ultrasonic testing
Study Notes
Ultrasonic Testing Procedure for Welded Joints in Pipelines
- Changes in wall thickness, bevel design, acoustic velocity, and welding process require additional demonstration welds.
- Radiographs are made of the welds and results are documented.
- Ultrasonic testing procedure is applied within detailed temperature ranges and results are documented and compared with radiographs.
- Differences in detection results are documented and noted.
- Destructive testing of the weld sample may be required to confirm results.
- Ultrasonic testing procedure for production welding is based on its capability to locate imperfections and defects, and determine weld acceptability.
- Manual ultrasonic testing sensitivity is based on a reference standard with specific requirements for notch depth and dimensions.
- For automatic ultrasonic testing, flat bottom holes are machined into the pipe for calibration reflectors.
- Planar reflectors or flat bottom holes are installed at the weld centerline position for each fill pass required by the welding procedure.
- A transfer technique using probes of the same nominal angles and frequencies is carried out to determine actual full skip distance and refracted angle.
- Compression wave testing of parent material on both sides of the weld is performed before ultrasonic testing.
- Manual compression wave testing of parent material is performed with the second backwall echo from the reference standard adjusted to at least 80% of full screen height.
Test your knowledge of ultrasonic testing procedures for welded joints in pipelines with this quiz. Explore topics such as wall thickness changes, acoustic velocity, destructive testing, and the use of calibration reflectors. See how well you understand the documentation and comparison of results from radiographs and ultrasonic testing.
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