NB/T 47013.1-2015Nondestructive testing of pressure equipments - Part 1: General requirements (English PDF)

3.1 Nondestructive testing, NDT

On the premise of not damaging testing objects, conduct check and testing to the internal and surface structure, nature or state of testing objects by using physical or chemical methods with appropriate equipment according to technical requirements in specification and analyze and evaluate the result.

3.2 Incomplete penetration

The phenomenon that the joint ends are not completely dissolved in welding. For butt weld, it also refers to the phenomenon that the welding depth does not meet the design requirements.

3.3 Lack of fusion

The unbound parts between weld metal and base metal or among weld layers of weld metal, which may be one of the following forms.

3.4 Slag

The residual slag in weld metals. According to the formation situation, the slag may be.

3.5 Burn-through

The perforation formed because molten metal flows from the back of groove in welding process.

3.6 Overlap

The metal overlap formed because the molten metal flows to unmelted base metal or welding line in welding process.

4.1 Testing personnel

4.1.1 Personnel conducting nondestructive testing of pressure equipment shall obtain corresponding nondestructive testing personnel qualifications according to relevant provisions about the review to nondestructive testing personnel of national special equipment.

4.1.2 The qualification of nondestructive testing personnel is divided into class I (primary), class II (intermediate) and class III (advanced).

4.1.3 Personnel acquiring different qualification classes of different nondestructive testing methods can only be engaged in nondestructive testing work corresponding to the method and the qualification.

4.2 Testing equipment and devices

4.2.1 Testing equipment and main devices shall be accompanied with product quality certification documents.

4.2.2 Testing equipment and devices shall comply with provisions of corresponding product standard and the performances of them shall meet relevant requirements specified in the Standard NB/T 47013.2 ~ 47013.13 and certification documents are required to provide.

4.2.4 For nondestructive testing equipment and devices related to sensitivity that can be used repeatedly, to maintain their credibility, it shall conduct checking to them according to relevant requirements in each part of the Standard during the period of checking, calibration or verification, the items, period and performance indicators of checking shall be specified in the process rules of the testing organization.

4.2.5 For nondestructive testing equipment and devices related to sensitivity that can be used repeatedly, before nondestructive testing, it shall conduct checking according to relevant requirements of each part of the Standard and the checking items shall be specified in the operating instruction of the testing organization.

4.3 Testing methods and process

4.3.1 Selection of nondestructive testing methods

4.3.2 Process documents of nondestructive testing

4.3.2.1 The testing organization shall develop process documents of nondestructive testing, which shall include process procedure and operating instruction.

4.4 Testing place and environment

4.4.1 The testing place and environment includes but not limited to energy, lighting and environmental conditions (including wind speed, temperature, humidity and other factors), which shall contribute to the effective implementation of nondestructive testing.

4.4.2 In addition to complying with national and local regulations on environmental health and labor protection, the testing place and environment shall not be place and environment with relative influence on human body that may interfere with normal operation, observe and judgment.

4.4.3 If the testing place and environment have effects on testing quality, shall adopt effective control measures, monitor, and record the environment conditions meantime; when the environmental conditions endanger the testing result, shall stop the testing.

4.4.4 It shall not separate adjacent areas for incompatible activities effectively and take measures to prevent mutual interference.

5.1 General requirements

5.1.1 Each nondestructive method has its capability scope and limitations and enough implementation and operation space shall be ensured. The capability scope and limitations of each nondestructive method involved in this Part are shown in 5.2 and the common defects that can be detected usually are shown in Annex A (informative).

5.2 Capability scope and limitations of each nondestructive testing method

5.2.1 Radiographic testing

5.2.1.3 The specific requirements of radiographic testing shall be conducted according to provisions of NB/T 47013.2.

5.2.1.1 Capability scope

5.2.1.2 Limitations

5.2.2 Ultrasonic testing

5.2.2.1 Capability scope

5.2.2.2 Limitations

provisions of NB/T 47013.3.

5.2.3 Magnetic particle testing

5.2.3.3 The specific requirements of magnetic particle testing shall be conducted according to provisions of NB/T 47013.4.

5.2.3.1 Capability scope

5.2.3.2 Limitations

5.2.4 Penetrant testing

5.2.4.3 The specific requirements of penetrant testing shall be conducted according to provisions of NB/T 47013.5.

5.2.4.1 Capability scope

It can test surface opening defects in metal materials, such as porosity, slag, crack, loosen and other defects.

It can test surface opening defects and near surface defects in ferro magnetic materials.

5.2.4.2 Limitations

It is difficult to test porous materials.

5.2.5 Eddy current testing

5.2.5.3 The specific requirements of eddy current testing shall be implemented according to provisions of NB/T 47013.6.

5.2.5.1 Capability scope

5.2.5.2 Limitations

5.2.6 Visual testing

5.2.6.3 The specific requirements of visual testing shall be conducted according to provisions of NB/T 47013.7.

5.2.6.1 Capability scope

5.2.6.2 Limitations

5.2.7 Leak testing

5.2.7.3 The specific requirements of leak testing shall be conducted according to provisions of NB/T 47013.8.

5.2.7.1 Capability scope

5.2.7.2 Limitations

5.2.8 Acoustic emission testing

5.2.8.3 The specific requirements of acoustic emission testing shall be conducted according to provisions of NB/T 47013.9.

5.2.8.1 Capability scope

5.2.8.2 Limitations

5.2.9 Ultrasonic time of flight diffraction technique testing

5.2.9.1 Capability scope

5.2.10 X-ray digital radioscopic examination

5.2.10.1 Capability scope

5.2.10.2 Limitations

7.1 Archive of nondestructive testing

The testing organization shall establish complete archive of nondestructive testing, which shall include the following contents at least.

7.2 Nondestructive testing process documents

7.2.1 Nondestructive testing process documents include process procedure and operation instruction.

7.2.2 Process procedure shall at least include the following contents.

7.2.3 The operating instruction shall at least include the following contents. […]

7.3 Nondestructive testing record

7.3.1 The nondestructive testing record shall at least include the following contents. […]

7.4 Nondestructive testing report

7.4.1 The nondestructive testing report shall at least include the following contents.

7.4.2 The nondestructive testing report shall also comply with relevant requirements in NB/T 47130.2 ~ 47130.13.

7.4.3 The development and audit of the nondestructive testing report shall comply with provisions of relevant laws and regulations or standards.

7.4.4 The storage life of the nondestructive testing report shall comply with requirements of relevant regulations and standards and shall not be less than 7 years. […]