GB/T 20801.5-2020 PDF English
US$245.00 · In stock · Download in 9 secondsGB/T 20801.5-2020: Pressure piping code - Industrial piping - Part 5: Inspection and testing Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 20801.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 20801.5-2020 | English | 245 |
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Pressure piping code - Industrial piping - Part 5: Inspection and testing
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| GB/T 20801.5-2006 | English | 85 |
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Pressure piping code -- Industrial piping -- Part 5: Inspection and testing
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GB/T 20801.5-2020: Pressure piping code - Industrial piping - Part 5: Inspection and testing---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20801.5-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040
J 74
Replacing GB/T 20801.5-2006
Pressure piping code - Industrial piping - Part 5.
Inspection and testing
Issued on. NOVEMBER 19, 2020
Implemented on. JUNE 01, 2021
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Examination requirements... 7
5 Examination methods... 8
6 Examination scope and acceptance criteria... 10
7 Examination process... 19
8 Examination certificate and records... 19
9 Testing... 19
10 Record... 29
1 Scope
This Part of GB/T 20801 specifies the basic safety requirements for pressure
piping inspection, examination and testing.
This Part applies to the inspection, examination and testing of pressure piping
which is defined by the scope of GB/T 20801.1.
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 20801.1-2020, Pressure piping code - Industrial piping - Part 1.
General
GB/T 20801.2-2020, Pressure piping code - Industrial piping - Part 2.
Materials
GB/T 20801.3-2020, Pressure piping code - Industrial piping - Part 3.Design
and calculation
GB/T 20801.4-2020, Pressure piping code - Industrial piping - Part 4.
Fabrication and assembly
GB/T 20801.6-2020, Pressure piping code - Industrial piping - Part 6.
Safeguarding
3 Terms and definitions
Terms and definitions determined by GB/T 20801.1-2020, GB/T 20801.2-2020,
GB/T 20801.3-2020, GB/T 20801.4-2020, GB/T 20801.6-2020, and the
following ones are applicable to this document.
3.1
Inspection
The compliance review process, which is carried out by the owner or an
inspection agency independent of the piping builder, to verify whether the
product or piping construction meets the specifications and engineering design
requirements.
3.2
Inspector
Full-time personnel of the owner or inspection agency engaged in inspection
work.
4 Examination requirements
4.1 General provisions
4.1.1 This Chapter stipulates the piping installation, including requirements for
the examination of each component and its fabrication and processing
technology, additional examinations and acceptance standards required by any
engineering design.
4.1.2 The examination and testing of the piping components (or their elements)
which are processed by the factory shall meet the requirements of relevant
product standards and design documents.
4.4 Progressive examination
When out-of-gauge defects are found in partial or sampling examination, they
shall be dealt with according to the following requirements.
4.5 Examination personnel
Field fabrication and welding examination and testing, if there is no special
indication, shall be carried out by the construction unit. The examination
personnel shall meet the definition in 3.4.
5 Examination methods
5.1 General provisions
5.1.1 This Chapter specifies the main examination methods that confirm to this
Part, the engineering design or the inspector’s requirements. If methods other
than those specified in this Chapter are used, the acceptance criteria shall be
specified in the engineering design.
5.3 Non-destructive testing
The non-destructive testing of welded joints is divided into radiographic testing,
ultrasonic testing, magnetic particle testing, penetrant testing, ultrasonic time of
flight diffraction technique, and standard practice for X-ray digital radiography.
5.4 Hardness examination
Welded joints, hot bending and hot formed components shall be subjected to
the hardness examination, to check the reliability of the heat treatment process.
6 Examination scope and acceptance criteria
6.1 Examination grade
6.1.1 Pressure piping is divided into five examination grades I, II, III, IV, V
according to piping grade, material category and nominal pressure.
6.1.2 The examination grade of the pressure piping that meets one of the
following conditions is grade I.
6.1.3 The examination grade of the pressure piping that meets one of the
following conditions is grade II.
6.1.5 The examination grade of the pressure piping that meets one of the
following conditions is grade IV.
6.1.6 The examination grade of grade GC3 pressure piping is grade V.
6.2 Visual examination
6.5 Hardness examination
6.5.1 Unless otherwise specified in the design documents, the quantity and
acceptance criteria of the pressure piping hardness examination shall meet the
requirements of 9.6 in GB/T 20801.4-2020.
7 Examination process
The examination shall be carried out according to a certain method specified in
Chapter 5; the inspector shall verify the evaluation result, date and record of
the examination process.
8 Examination certificate and records
The examination personnel shall make sure that the materials and components
are of the specified grade and have passed the required heat treatment,
examination and testing, through the review of the certificate, quality certificate,
marking and other certification documents.
9 Testing
9.1 Pressure testing
9.1.1 General requirements
Before the initial operation and after the completion of the relevant
examinations in accordance with the requirements of Chapter 6, each piping
system shall be subjected to pressure test to ensure its pressure-bearing
strength and tightness. Except for the case where the pressure test can be
replaced, which is specified in 9.1.1.1, the hydraulic test shall be carried out in
accordance with the provisions of 9.1.3.
9.1.1.5 Vacuum or external pressure piping
The pressure test of vacuum or external pressure piping shall meet the following
requirements.
9.1.1.6 Jacketed pipe
The pressure test of the jacketed pipe shall meet the following requirements.
9.1.1.8 Test record
A test record shall be made for each piping system; the record content shall at
least include the following main contents.
9.1.2 Preparation
9.1.2.1 Exposed joints
The exposed joints during the pressure test shall meet the following
requirements.
9.1.3 Hydraulic test
The hydraulic test shall meet the following requirements.
9.3 Vacuum test
Except for the case of 9.1.1.5b), after the vacuum piping system is qualified in
the pressure test, a 24 h vacuum test shall be carried out in accordance with
the provisions of the design documents, and the pressure increase rate shall
not exceed 5%. The pressurization rate shall be calculated according to
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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