Volume-II of IV - GAIL

MECON LIMITED
REGD. OFF: RANCHI (BIHAR)
PROCESS & PIPING
DESIGN SECTION
NEW DELHI
TITLE PIPING FABRICATION AND
ERECTION
1.0 ULTRASONIC INSPECTION
STANDARD SPECIFICATION
SPECIFICATION NO. PAGE 49 OF 62
MEC/S/05/62/06 REVISION 0
ANNEXURE-3
In addition to the radiographic inspection ultrasonic inspection is required as per
conditions mentioned in Annexure-1 of this specification.
This section concerns manual ultrasonic inspection. However ultrasonic
inspection by automatic equipment may be used if approved by the COMPANY.
1.1 Equipment and Operators
The CONTRACTOR who carries out the ultrasonic inspection shall have
sufficient qualified personnel, equipment and instrument at his disposal to be
able to effect the tests without hindering or delaying the pipeline assembly
operations.
• Calibrate the equipment;
• Perform an operational test under production conditions;
• Interpret the screen picture;
• Evaluate the size and location of reflectors
• Interpret the type of defects detected.
The COMPANY has the option of checking the ability of personnel employed for
ultrasonic testing by means of qualification tests.
The CONTRACTOR appointed to carry out UT inspection shall supply the
instruments necessary for their execution on site.
1.2 Specification for Ultrasonic Testing Procedure
Qualification
Before work begins the CONTRACTOR shall present a specification describing
the proposed U.T. procedure qualification.
This specification shall be state, as an indication only but not limited to the
following information :
• Type of U.T. equipment used