GB 50235-2010 PDF English
US$145.00 · In stock · Download in 9 secondsGB 50235-2010: Code for construction of industrial metallic piping engineering Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 50235: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 50235-2010 | English | 145 |
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Code for construction of industrial metallic piping engineering
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| GB 50235-1997 | English | RFQ |
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Code for construction and acceptance of industrial metallic piping
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GB 50235-2010: Code for construction of industrial metallic piping engineering---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/GB50235-2010
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
r.fl ~A ~~'Jl IE r@ ~t"Flit
Code for Construction of Industrial Metallic
Piping Engineering
Issued on: AUGUST 18, 2010
Implemented on: JUNE 1, 2011
Jointly Issued by Ministry of Housing and Urban-Rural Construction of the People's
Republic of China
General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Table of Contents
General Provisions ... 1
2 Terms and Symbols ... 2
2.1 Terms ... 2
2.2 Symbols ... 4
3 Basic Requirements ... 6
3 .1 General Require1nents ... 6
3 .2 Grading ... 6
4 Inspection of Pipework Components and Materials ... 7
4.1 General Requirements ... 7
4.2 Valve Inspection ... 7
4.3 Inspection of Other Pipework Components . 8
5 Machining of Piping ... , . 10
5 .1 General Requirement... 10
5.2 Pipe Cutting ... 10
5.3 Bending Fabrication ... I 0
5 .4 Machining of Rolling Pipe ... 13
5.5 Flanging Edge of Pipe Orvfice ... 14
5.6 Machining of Jacket Piping ... 15
5.7 Fabrication of Miter Elbow ... 16
5.8 Fabrication of Piping Support and Hanger . 16
6 Welding and Heat-Treatment After Welding of Piping ... 18
7 Installation of Piping ... 23
7.1 General Requirement ... 23
7.2 Prefabricating for Pipe segment ... 24
7.3 Steel Piping Installation . 24
7.4 Piping Installation of Coupling Equipment ... 27
7.5 Cast Iron Piping Installation ... 28
7.6 Installation of Stainless Steel Piping and Non-Ferrous Piping 29
7. 7 Heat Tracing Piping Installation ... 30
7.8 Jacket Piping Installation ... 31
7 .9 Installation of Anti-Corrosion Lining Piping 32
7.10 Valve Installation 32
7 .11 Expansion Joint Installation 33
7.12 Installation of Piping Support and Hanger . 36
7 .13 Installation of Static Electricity Grounding 3 8
8 Inspection, Examination and Test of Piping 39
8.1 General Requirement... 39
8.2 Visual Examination . 39
8.3 Non-Destructive Testing of Welding Seam Surface . 39
8.4 Radiographic and Ultrasonic Examinations of Welding Seam 40
8.5 Hardness Inspection and Other Inspections ...40
8 .6 Pressure Test 41
9 Piping Cleaning and Blowing . 46
9 .1 General Requirement... 46
9 .2 Water Washing . 4 7
9 .3 Air Blowing 4 7
9 .4 Steam Blowing ... 48
9.5 Degreasing 48
9 .6 Chemical Cleaning ... 49
9. 7 Oil Cleaning . 49
10 Engineering Delivery 51
Appendix A Content and the Format for the Record of the Inspection on the Construction Quality. 53
Explanation of Wording in This Code 70
List of Quoted Standards 71
1 General Provisions
1.0.1 This code is formulated with a view to improving the construction level of industrial metallic
piping engineering, strengthening the quality control in the industrial metallic piping construction, and
guaranteeing the construction quality.
1.0.2 This code is applicable to the construction of industrial metallic piping whose design pressure
is not higher than 42MPa and design temperature is not higher than the allowable service temperature
of the material hereof.
1.0.3 This code is not applicable to the constructions of the following industrial metallic piping.
1 Piping of prospecting and extraction devices used for petroleum, natural gas, terrestrial heat;
2 Long-distance piping;
3 Piping special for nuclear energy plant;
4 Piping for offshore facility and mining shaft;
5 Piping for heating ventilation and air conditioning, or non-circular section piping.
1.0.4 The industrial metallic piping construction shall be carried out according to the requirements
of the design document and this code.
1.0.5 Where the design document needs be modified or the material needs be substituted, it
shall be approved by the original design organization and issued with the written document.
1.0.6 The construction of the piping for field assembly equipment shall comply with the requirements of
the manufacturer's technical documentation, and shall not be inferior to the ones specified in this
code.
1.0.7 This code shall apply in conjunction with the current national standard "Code for Acceptance
of Construction Quality of Industrial Metallic Piping Engineering" GB 50184.
1.0.8 The construction of anticorrosive engineering for industrial metallic piping shall meet the
requirements of the national current relevant standard and design document.
1.0.9 The construction of heat insulation engineering for industrial metallic piping shall meet the
requirements of the current national standard "Code for Construction of Industrial Equipment and
Piping Insulation Engineering" GB 50126 and the design document.
1.0.10 The construction of industrial metallic piping, shall meet the requirements of the national
current relevant standards, besides this code.
2 Terms and Symbols
2.1 Terms
2.1.1 Nominal pressure (PN) for pipe-work components
A method of indication to express nominal pressure grade of pipework component by using the
combination of letters PN and dimensionless numbers.
2.1.2 Nominal size for pipework components
A method of indication to express nominal size of pipework component by using the
combination of letters DN and dimensionless numbers.
2.1.3 Industrial metallic piping
Process piping, public engineering piping and other subsidiary piping made by connection or
assembling with metallic pipework components, used to convey processing medium in production
equipments.
2.1.4 Pressure piping
Piping with maximum working pressure larger than or equal to O.lMPa (gauge pressure) and
nominal size higher than 25mm, used to convey gas, liquefied gas, free steam or combustible, explosive,
toxic and corrosive liquid medium with maximum working temperature higher than or equal to the
normal boiling point.
2.1.5 D-type fluid piping
Incombustible, nontoxic or negligibly-nontoxic fluid piping with design pressure less than or
equal to 1.0MPa and design temperature higher -zo·c but not higher than 185°C.
2.1.6 C-type fluid piping
Incombustible, nontoxic or negligibly-nontoxic fluid piping excluding D-type fluid piping.
2.1.7 Pipework components
The generic term of spare parts for forming piping system by connection or assembling,
including piping components and pipe-supporting elements.
2.1.8 Piping components
Pipework components used for connecting or assembling piping, including pipe, pipe fittings ,
flange, sealing element, fastener, valve, safety protection devices, expansion joint, flexible joint,
pressure hose, steam trap, filter, throttling device and separator in piping, etc
2.1.9 Pipe-supporting elements
Pipework components used to transmitting piping deadweight, conveyance fluid weight, load
caused by operating pressure and temperature difference, and loads caused by vibration, wind force,
earthquake, snow load, impact and displacement strain, including hanger rod, spring supporter/hanger,
constant force supports/hangers, diagonal tie, balance weight, tightening bolt, brace strut, chain, guide
3 Basic Requirements
3.1 General Requirements
3.1.1 The construction organization undertaking industrial metallic piping engineering shall obtain
corresponding construction qualification and conduct the corresponding piping installation within the
qualification admission scope. The inspection organization shall obtain corresponding inspection
qualification and conduct the corresponding piping engineering inspection works within its qualification
admission scope.
3.1.2 The construction organization shall set up the quality management system on piping installation
site, and develop sound quality control system and corresponding construction technology standards.
3.1.3 The personnel participating industrial metallic piping construction and quality inspection and
testing shall have corresponding qualifications.
3.1.4 The following conditions shall be available before industrial metallic piping construction.
1 The engineering design drawing and the technical documents relevant shall be complete, and
the design disclosure and drawing joint hearing have been conducted as required procedure.
2 The construction organization design or the construction scheme has been approved, and the
technology and safety technical disclosure have been conducted.
3 The constructors has passes the examination as the relevant requirements.
4 The commencement documents have been transac...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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