Standard No.:	CB/T 3177-1994
Chinese Name:	船舶钢焊缝射线照相和超声波检查规则
English Name:
Professional Classification:	U06 Vessel technology
Professional Classification:	CB Professional Standard - Watercraft
ICS Classification:	47.020.01 General standards related to shipbuilding and marine structures
Issued by:
Issued on:	1994-02-01
Implemented on:	1993-02-01
Status:	VALID
Replace:	CB3177-83
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	105 (USD)
Delivery:	via email in 1-3 business day

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.