JB/T 5000.14-2007 (JBT5000.14-2007)

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JB/T 5000.14-2007	English	135	Add to Cart	0--9 seconds. Auto-delivery	Heavy mechanical general techniques and standards - Part 14: Non-destructive inspection of cast steel	JB/T 5000.14-2007	Valid	JB/T 5000.14-2007

National JB Standard of the People’s Republic of China
Replace JB/T 5000.6-1998
Heavy mechanical general techniques and standards --
Part 14. Non-destructive inspection of cast steel
Issue date. August 28, 2007 Implementation date. February 1, 2008
Issued by. National Development and Reform Commission, PRC
Some pages are intentionally removed. Please purchase a full copy from.
Contents
Foreword ...3
1 Scope...5
2 Normative References...5
3 Terms And Definitions ...5
4. General Requirements...6
5 Quality Grade...7
6. Inspection Methods ...13
Appendix A ...16
Appendix B ...21
Appendix C ...32
Appendix D...42
Foreword
JB/T 5000 《Heavy mechanical general techniques and standards》divided into 15 parts.
____Part one. Product Inspection
____Part two. Flame cutting workpiece
____Part three. Weldment
____Part four. Iron casting
____Part five. Cast nonferrous metal
____Part six. Castings steel
____Part seven. Castings Steel repair welding
____Part eight. Forgings
____Part night. Cutting work piece
____Part ten. Assembly
____Part eleven. Tubing
____Part twelve. Painting
____Part thirteen. Packing
____Part fourteen. Castings steel nondestructive examination
____Part fifteen. Forgings steel nondestructive examination
This part is JB/T 5000’s part fourteen.
This part is instead of JB/T 5000.14-1998《Heavy mechanical general techniques and standards
Castings steel nondestructive inspection workpiece》
This part compare to the JB/T 5000.18-1998, the main changes are as follow.
____ Revise the defect indication classification and definition
____ Revise the defect quality grade, record limitation and inspection limitation
This standard appendix A, appendix B and appendix C and appendix D are regulatory appendices.
This standard is offered by the China Machinery Industry Association.
This standard is centralized management by the engineering industry metallurgical equipment
technical committee for standardization.
This standard’s draft out unit. China National No. 2 Heavy Machinery Group Corp.
This part’s draftsman. Fan Lunhui, Zhao Xiaohui ,Yang xin,Chen Chong
This part’s previous edition.
—JB/T 5000.14—1998
Heavy mechanical general techniques and standards
Part 14 - Cast steel nondestructive inspection
1 Scope
JB/T 5000 specifies the ultrasonic inspection, ray inspection, magnetic particle inspection and
penetrate inspection with its relative quality grade.
This standard is for steel castings using on heavy machine .The ultrasonic inspection is for
castings of carbon steel and low alloy steel which thickness is not less than 30mm, and this is not
suit for austenitic castings .Ray inspection is for steel castings which thickness is from 5mm to
300mm. Magnetic particle inspection is for defects inspection on the surface of or near-surface of
ferrite steel castings. Penetrate inspection is for open defect on the surface of steel castings.
All the nondestructive inspection methods used hereby for inspection, should note out the
inspection method, position, depth bounds and quality grade, etc on product draft, technical file
and ordering technical specifications.
2 Normative References
Through the quoted by JB/T 5000 , Following documents’ items are become to the items of this
standard .Any quoted documents if it is dated, the following modify notification (not including the
errata contents) or modify edition are not apply to this standard .But, the agreement which is
according to this part can use this standard’s latest edition. If it’s not dated, it’s the latest edition
can apply to this part.
GB/T 5097—1985 Method for indirect assessment of black light sources
GB/T 19348.1 Industrial radiographic film Part 1 . Classifications on industrial radiographic
film system (GB/T 19348.1—2003, ISO 11669-1, IDT)
JB/T 6063 Nondestructive inspection Technical specifications on magnetic particle inspection
JB/T 7902 Nondestructive inspection Wire quality indicators used for radiographic film
inspection
JB/T 7903 Industrial radiographic illuminators (JB/T 7093—1999, eqv ISO 5580. 1985)
3 Terms and definitions
Following terms and definitions are applied to this part.
3.1Linear indication
The length of linear defect indication should be three times than its width.
3.2Nonlinear indication
The length of nonlinear defect indication should be three times less than its width.
3.3 Cluster of defect indications
A cluster of defect indications happen when the distance between two adjacent defects is two
times less than the length of the bigger one.
3.4 Array defect indications
An array defect indications are including at least three linear defect indications or nonlinear defect
indications, and the distance by line connection between them less than 2mm.
4. General requirements
4.1 Application principles
4.1.1 The chosen of inspection method and quality inspecting grade should be based on the usage
and type of forgings which should be accord with the requirements of relative technical
documents.
4.1.2 For the ferromagnetic forgings which required surface inspection, the magnetic particle
inspection should be prior to use. The penetrate inspection is used only when there are some
limitations, for instance structural morphology or resource condition.
4.2 Inspection files
4.2.1 When inspecting wildings by using standards hereby, a nondestructive inspection
specification which is according with relevant regulation can be made out by referring to the
standards hereby when necessary.
4.2.2 The inspection procedure and result should be exact and integrity with a signature of the one
responsible for. The storage period of inspection records and reports should be not less than 5
years .After 5 year, provided the user requiring, they can be given to the user self for reserving.
4.2.3 In the inspection files, the quality grade and validity term of relevant inspector who is
responsible for a inspection should be recorded.
4.2.4 A regular inspection with a record should be taken on the inspection equipment and device’s
performance, and only after qualifying, they can be used.
4.3 Inspector
4.3.1 All the inspectors work on the nondestructive inspection should hold a qualification
certificate awarded by the national relevant department.
4.3.2 The inspector of nondestructive inspection is graded senior level, medium level and general
level. The inspector with a leveled certificate should work on a relative inspection work on each
level carrying a relative technical responsibility.
4.3.3 The inspector of nondestructive inspection should have a good physical condition; moreover
the vision has to reach the following requirements.
4.3.3.1Corrected visual acuity should be no less than 5.0 (the decimal fraction is 1.0) and take a
sight test every year.
4.3.3.2 The inspector work on the surface inspection should not be color blindness.
5 Quality grade
5.1Classification
For the classification on external quality grade, magnetic particle or penetrate inspection should be
done as regulating in table 1 and 2. When an agreement can not be made, the figures in both tables
should be forced to use.
The classification on inner quality grade, ultrasonic or ray inspection should be done as regulating
in table 3 and 4.
5.2 Choosing quality grade
5.2.1 The defects allowed on external or inner of steel castings can be regulated in material
standard or according to the quality grading order in 5.1. The following items have to be
considered according to magnitude of load, method and distribution.
5.2.1.1 For the different area on the castings, a different quality grade can be made .In this case a
relative area should be specified as following.
—— indicate the place, length and width;
—— other depth should be given out to the welding seam’s each end and the special edge area in
5.2.3.
5.2.1.2 For the quality on external or inner, a same or different quality grade can be decided.
5.2.1.3 The quality grade 1 is only be used for welding or the special edge area in 5.2.3.
5.2.1.4 The shape of castings can affect its quality and inspectable .Moreover, the inspectable of
castings is also concerning with the surface condition.
5.2.2 The grade 5 is applied when ordering provided a quality grade is not indicated and other
requirements is also not specified in the material standard,
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