NB/T 34370 comprises the following 6 parts, under the general title of Nondestructive Testing of Amusement Equipments:
- Part 1: General Provisions;
- Part 2: Visual Examination;
- Part 3: Magnetic Particle Examination;
- Part 4: Penetrant Examination;
- Part 5: Ultrasonic Examination;
- Part 6: Radiographic Examination.
This part is Part 2 of GB/T 34370.
This part was developed according to the rules given in GB/T 1.1-2009.
This part is under the jurisdiction of the National Technical Committee on Ropeway and Entertainment Facilities of Standardization Administration of China (SAC/TC 250).
Drafting organization of this part: China Special Equipment Inspection and Research Institute, Jiangsu Special Equipment Safety Supervision and Inspection Institute, Shanghai Xidu Amusement Equipment Manufacturing Plant, Beijing Shibaolai Amusement Equipment Co., Ltd., Henan Special Equipment Safety Inspection Institute.
Chief drafting personnel of this part: Shen Gongtian, Liang Chaohu, Li Xiangdong, Zhang Yong, Zhou Xiaojun, Li Yong, Hu Bin, Wu Zhanwen, Gao Guangxing, Hu Zhenlong, Liu Aiguo.
Nondestructive Testing of Amusement Equipments—Part 2: Visual Examination
1 Scope
This part of GB/T 34370 specifies the visual examination method for amusement equipments.
This part is applicable to the visual examination of production and in-service amusement equipments.
This part is not applicable to the visual examination activities in other non-destructive testing methods such as magnetic particle and penetrant.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 11533 Standard for Logarithmic Visual Acuity Charts
GB/T 20306 Amusement Equipments Terminology
GB/T 20737 Nondestructive Testing—Terms and Definitions
GB/T 20968 Nondestructive Testing—Visual Examination Aids—Selection of Low Magnification Magnifier
GB/T 34370.1 Nondestructive Testing of Amusement Equipment—Part 1: General Provisions
3 Terms and Definitions
For the purpose of this standard, the terms and definitions specified in GB/T 20306 and GB/T 20737 as well as the following ones apply.
3.1
visual examination
a nondestructive testing method for observing, analyzing and evaluating the condition of the tested piece, which refers to the examination of the tested piece performed with human eyes or visual aid only
3.2
direct visual examination
a visual examination technique that uses eyes to detect without visual aids (except for illumination sources and magnifiers)
3.3
remote visual examination
a visual examination technique to a site or area that is difficult to perform direct visual examination by means of retro-reflector, telescope, endoscope, optical fiber, camera, video system, automated system, robot, and other suitable visual aid
3.4
translucent visual examination
a visual examination technique for observing changes in the thickness of a translucent laminate by means of artificial lighting
3.5
auxiliary lighting
an artificial illumination source used as aid for visual examination, so as to improve the conditions of visual examination and observation
3.6
surface glare
reflected light from an artificial illumination source that interferes with visual examination
3.7
translucent laminate
a type of laminate that bond with glass reinforced material, for correcting transmitted light
4 General
Visual examination is a nondestructive testing method for observing, analyzing and evaluating the condition of the tested piece with human eyes or visual aids, which is mainly intended to observe macroscopic damage of various material parts and welds such as corrosion, cracking, breakage, wear, and deformation, as well as abnormal matching, signs of overheating and leakage, and macroscopic defects of welds, etc.
Visual examination techniques include direct visual examination, remote visual examination, and translucent visual examination. Direct visual examination does not rely on aids (except illumination source and magnifier) to directly observe with bare eyes; remote visual examination can be done with retro-reflector, telescope, endoscope, optical fiber, camera, video system, automatic system, robot and other suitable visual aid for testing; translucent visual examination can be used to detect the interior of transparent and translucent materials.
5 Safety Requirements
The safety requirements during testing shall include at least:
a) Testing personnel shall observe the safety requirements of the test site, wear protective clothing and relevant protective equipments as required on the test site;
b) Care shall be taken to avoid various safety hazards such as bump, electric shock, fall, crushing, shearing, tangling, slip, drowning, and burn, etc.
This chapter does not exhaustively list the safety requirements for testing. The user of this part shall establish safety guidelines prior to testing.
6 Testing Personnel
Personnel engaged in visual examination of amusement facilities shall, in addition to comply with the relevant provisions of GB/T 34370.1, shall have an uncorrected or corrected visual acuity of not less than 5.0 (or 1.0 if expressed in decimal), and the test method shall comply with the provisions of GB/T 11533. The testing personnel shall have an eye examination every 12 months.
If the test renders special requirement for color discrimination, the testing personnel shall additionally have color test to ensure the necessary capability of color discrimination.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 General
5 Safety Requirements
6 Testing Personnel
7 Equipment and Apparatus
8 Testing Procedure
9 Testing
10 Result Evaluation
11 Visual Examination Report
Annex A (Informative) Typical Visual Defects in Steel Fusion Welded Joints
Annex B (Informative) Typical Visual Defects Pictures in Steel Fusion Welded Joints.
