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 范圍 1 Scope
2 規范性引用文件 2 Normative references
3 術語和定義 3 Terms and definitions
4 安全預防 4 Safety precautions
5 分類 5 Classification
5.1 概述 5.1 General
5.2 磁懸液 5.2 Magnetic ink
5.3 干磁粉 5.3 Dry magnetic powder
6 檢驗規則 6 Inspection rules
6.1 組批規則 6.1 Batching rules
6.2 檢驗分類 6.2 Inspection classification
6.3 檢驗項目 6.3 Inspection items
7 檢驗方法和技術要求 7 Inspection methods and technical requirements
7.1 性能 7.1 Performance
7.2 顏色 7.2 Color
7.3 磁粉尺寸 7.3 Magnetic particle size
7.4 耐熱性 7.4 Heat resistance
7.5 熒光系數和熒光穩定性 7.5 Fluorescence index and fluorescence stability
7.6 載液的熒光 7.6 Fluorescence of carrier fluid
7.7 閃點 7.7 Flash point
7.8 檢測介質引起的腐蝕 7.8 Corrosion caused by testing medium
7.9 載液的粘度 7.9 Viscosity of carrier fluid
7.10 機械穩定性 7.10 Mechanical stability
7.11 起泡 7.11 Bubbling
7.12 pH值 7.12 pH value
7.13 貯存穩定性 7.13 Storage stability
7.14 固體含量 7.14 Solid content
7.15 硫及鹵素含量 7.15 Sulfur and halogen content
8 標志和標簽 8 Mark and Label
9 包裝、運輸和貯存 9 Packaging, transportation and storage
附錄A (規范性附錄) 型式和批量檢驗規程 Annex A (Normative) Type and batch inspection specifications
A.1 檢測介質的準備 A.1 Preparation of testing medium
A.2 參考試塊的清洗 A.2 Cleaning of reference block
A.3 檢測介質的施加 A.3 Application of testing medium
A.4 檢驗與解釋 A.4 Inspection and interpretation
A.4.1 檢驗 A.4.1 Inspection
A.4.2 解釋 A.4.2 Interpretation
A.5 反差增強劑 A.5 Contrast aid paints
附錄B (規范性附錄) 參考試塊 Annex B (Normative) Reference block
B.1 1型參考試塊 B.1 Type 1 reference block
B.1.1 簡述 B.1.1 Brief description
B.1.2 制造 B.1.2 Fabrication
B.1.3 驗證 B.1.3 Verification
B.2 2型參考試塊 B.2 Type 2 reference block
B.2.1 簡述 B.2.1 Brief description
B.2.2 制造 B.2.2 Fabrication
B.2.3 驗證 B.2.3 Verification
附錄C (規范性附錄) 鋼腐蝕檢驗 Annex C (Normative) Inspection of corrosiveness to steel
C.1 原則 C.1 Principles
C.2 裝置 C.2 Apparatus
C.3 試劑和材料 C.3 Reagents and materials
C.4 檢驗步驟 C.4 Inspection steps
C.4.1 溶液制備(100mL) C.4.1 Preparation of solutions (100mL)
C.4.2 鐵粒與過濾紙的制備 C.4.2 Preparation of iron particles and filter paper
C.4.3 腐蝕檢驗 C.4.3 Corrosion inspection
C.5 結果解釋 C.5 Interpretation of results
C.6 結果表述 C.6 Expression of results
C.7 不確定性 C.7 Uncertainty
參考文獻 Bibliography
圖1 磁粉熒光系數β的測定 Figure 1 Determination for fluorescence index β of magnetic particles
圖2 7.10.2的攪拌布置結構 Figure 2 Structure of stirring apparatus in 7.
圖B.1 1型參考試塊 Figure B.1 Type 1 reference block
圖B.2 2型參考試塊 Figure B.2 Type 2 reference block
圖B.3 插入磁體的示意圖 Figure B.3 Schematic diagram for inserting magnet
圖B.4 2型試塊的刻槽 Figure B.4 Grooving of Type 2 test block
圖C.1 腐蝕痕跡的評價 Figure C.1 Evaluation of corrosion traces
表1 磁粉材料的檢驗 Table 1 Inspection of materials for magnetic particle testing
表C.1 過濾紙上腐蝕污染分級 Table C.1 Grading of corrosion contamination on filter paper
