1 Subject content and application scope
This standard specifies the basic requirements for radiographic and ultrasonic inspection of welding seams on ship steel structures.
This standard is applicable to the inspection of full penetration welds of ship hull, frame, ship pressure vessels and pipe systems.
2 Normative references
CB/T 3558 Radiographic technology and quality grading for steel welding seams on ship
CB/T 3559 Manual ultrasonic inspection technology and quality grading for steel welding seams on ship
3 Weld acceptance level
There are four acceptance levels according to the types, structures and position of ship products, as shown in the following table.
... ...
4 Inspection quantity
4.1 Marine cargo ships
4.1.1 The number of radiographs (number of inspection sections), N, of the strength deck and shell plate within the midship of 0.6L shall be calculated from Formula (1). The inspection quantity of butt welds at other parts shall be agreed between the manufacturer and the ship surveyor, and is generally not greater than 0.1 N.
1 Subject content and application scope
2 Normative references
3 Weld acceptance level
4 Inspection quantity
5 Inspection area (section)
6 Determination of inspection method
7 NDT operator
8 NDT equipment
9 NDT process and acceptance
10 Repair and reinspection of non-conforming welds
11 First pass yield
12 Confirmation and review of crack detection results
13 Documents and reports
Annex A Crack detection report (Informative)
Annex B Summary table (Informative)
Additional explanation:
