Non-destructive testing - Materials for magnetic particle testing
1 Scope
This standard specifies the classification, technical requirements and inspection methods of materials (or testing medium, including magnetic ink, dry magnetic powders, carrier fluid and contrast aid paints) for magnetic particle testing.
This standard is applicable to type inspection and batch inspection of testing medium.
It may also be used as the basis for acceptance of user orders.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 265 Petroleum products - Determination of kinematic viscosity and calculation of dynamic viscosity
GB/T 699 Quality carbon structure steels
GB/T 2007.7General rules for the sampling and sample preparation of minerals in bulk - The method for determination of size by manual sieving (GB/T 2007.7-1987, neq ISO 2591:1982)
GB/T 5097 Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing conditions (GB/T 5097-2005, ISO 3059: 2001, IDT)
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method (GB/T 6368-1993, eqv ISO 4316:1977)
GB/T 8034 Benzol products of coal carbonization - Corrosiveness to copper - Copper strip test (GB/T 8034-1987, eqv ISO 2160:1972)
GB/T 12604.5 Non-destructive testing - Terminology - Terms used in magnetic particle testing
GB/T 15822 (All parts) Non-destructive testing - Magnetic particle testing (GB/T 15822.1~3-2005, ISO 9934-1:2001, ISO 9934-2~3:2002, IDT)
JB/T 7523-2004 Non-destructive testing - Materials for penetrant testing
3 Terms and definitions
For the purpose of this standard, the terms and definitions established in GB/T 12604.5 apply.
4 Safety precautions
Materials for magnetic particle testing and chemicals for inspection may be harmful, flammable and/or volatile, so the precautions should be followed. All national and local laws and regulations on safety, sanitation and environmental protection shall be observed.
5 Classification
5.1 General
Materials for magnetic particle testing covered by this standard shall be classified as follows.
5.2 Magnetic ink
Magnetic ink shall be composed of color magnetic particles or fluorescent magnetic particles added with suitable carrier fluid, and shall be in uniform suspension by stirring.
Magnetic ink may be prepared from purchased concentrated products (including magnetic paste and dry magnetic powder), or be used directly.
5.3 Dry magnetic powder
Dry magnetic powder used for dry method shall be subdivided into color and/or fluorescent magnetic particles.
6 Inspection rules
6.1 Batching rules
Each batch consists of the magnetic particle products with the same performance and marked with specific symbols that are put into production at the same time.
6.2 Inspection classification
6.2.1 Type inspection
Type inspection should be carried out in one of the following cases:
a) when new production or production shift occurs or the production is resumed after a halt;
b) when the material or process changes;
c) when it is stipulated in the contract;
d) when more than six months have passed since the previous type inspection.
Type inspection of materials for magnetic particle testing shall be carried out according to the requirements of GB/T 15822. The purpose of type inspection is to verify the suitability of the product for the intended use. It shall be conducted by an independent laboratory 1).
The independent laboratory shall issue an inspection report in accordance with this standard.
6.2.2 Batch inspection (or end-of-manufacturing inspection)
The batch inspection in this standard shall refer to inspection to each batch of products according to GB/T 15822. The purpose of batch inspection is to verify that the characteristics of this batch are consistent with the approved type inspection products.
If an agreement is reached at the time of ordering, the manufacturer or supplier of materials for magnetic particle testing shall provide inspection certificates to show which methods are used according to this standard. The certificate shall include the inspection
Contents
前言 Foreword i
1 范围 1 Scope
2 规范性引用文件 2 Normative references
3 术语和定义 3 Terms and definitions
4 安全预防 4 Safety precautions
5 分类 5 Classification
5.1 概述 5.1 General
5.2 磁悬液 5.2 Magnetic ink
5.3 干磁粉 5.3 Dry magnetic powder
6 检验规则 6 Inspection rules
6.1 组批规则 6.1 Batching rules
6.2 检验分类 6.2 Inspection classification
6.3 检验项目 6.3 Inspection items
7 检验方法和技术要求 7 Inspection methods and technical requirements
7.1 性能 7.1 Performance
7.2 颜色 7.2 Color
7.3 磁粉尺寸 7.3 Magnetic particle size
7.4 耐热性 7.4 Heat resistance
7.5 荧光系数和荧光稳定性 7.5 Fluorescence index and fluorescence stability
7.6 载液的荧光 7.6 Fluorescence of carrier fluid
7.7 闪点 7.7 Flash point
7.8 检测介质引起的腐蚀 7.8 Corrosion caused by testing medium
7.9 载液的粘度 7.9 Viscosity of carrier fluid
7.10 机械稳定性 7.10 Mechanical stability
7.11 起泡 7.11 Bubbling
7.12 pH值 7.12 pH value
7.13 贮存稳定性 7.13 Storage stability
7.14 固体含量 7.14 Solid content
7.15 硫及卤素含量 7.15 Sulfur and halogen content
8 标志和标签 8 Mark and Label
9 包装、运输和贮存 9 Packaging, transportation and storage
附录A (规范性附录) 型式和批量检验规程 Annex A (Normative) Type and batch inspection specifications
A.1 检测介质的准备 A.1 Preparation of testing medium
A.2 参考试块的清洗 A.2 Cleaning of reference block
A.3 检测介质的施加 A.3 Application of testing medium
A.4 检验与解释 A.4 Inspection and interpretation
A.4.1 检验 A.4.1 Inspection
A.4.2 解释 A.4.2 Interpretation
A.5 反差增强剂 A.5 Contrast aid paints
附录B (规范性附录) 参考试块 Annex B (Normative) Reference block
B.1 1型参考试块 B.1 Type 1 reference block
B.1.1 简述 B.1.1 Brief description
B.1.2 制造 B.1.2 Fabrication
B.1.3 验证 B.1.3 Verification
B.2 2型参考试块 B.2 Type 2 reference block
B.2.1 简述 B.2.1 Brief description
B.2.2 制造 B.2.2 Fabrication
B.2.3 验证 B.2.3 Verification
附录C (规范性附录) 钢腐蚀检验 Annex C (Normative) Inspection of corrosiveness to steel
C.1 原则 C.1 Principles
C.2 装置 C.2 Apparatus
C.3 试剂和材料 C.3 Reagents and materials
C.4 检验步骤 C.4 Inspection steps
C.4.1 溶液制备(100mL) C.4.1 Preparation of solutions (100mL)
C.4.2 铁粒与过滤纸的制备 C.4.2 Preparation of iron particles and filter paper
C.4.3 腐蚀检验 C.4.3 Corrosion inspection
C.5 结果解释 C.5 Interpretation of results
C.6 结果表述 C.6 Expression of results
C.7 不确定性 C.7 Uncertainty
参考文献 Bibliography
图1 磁粉荧光系数β的测定 Figure 1 Determination for fluorescence index β of magnetic particles
图2 7.10.2的搅拌布置结构 Figure 2 Structure of stirring apparatus in 7.
图B.1 1型参考试块 Figure B.1 Type 1 reference block
图B.2 2型参考试块 Figure B.2 Type 2 reference block
图B.3 插入磁体的示意图 Figure B.3 Schematic diagram for inserting magnet
图B.4 2型试块的刻槽 Figure B.4 Grooving of Type 2 test block
图C.1 腐蚀痕迹的评价 Figure C.1 Evaluation of corrosion traces
表1 磁粉材料的检验 Table 1 Inspection of materials for magnetic particle testing
表C.1 过滤纸上腐蚀污染分级 Table C.1 Grading of corrosion contamination on filter paper
