GB 50316-2000 English PDF (GB50316-2000)

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GB 50316-2000: [GB 50316-2008 Edition] Design code for industrial metallic piping
GB 50316-2000
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50316-2000
Design Code for Industrial Metallic Piping
(2008 Revision)
ISSUED ON. SEPTEMBER 26, 2000
IMPLEMENTED ON. JANUARY 1, 2001
Jointly issued. State Quality and Technology Supervision Bureau (SQTSB);
Ministry of Construction (MOC) of the People’s Republic of
China.
Table of Contents
1. General Stipulations ... 6 
2. Nomenclature and Symbols ... 7 
2.1 Nomenclature ... 7 
2.2 Symbols ... 9 
3. Design Condition and Design Reference ... 16 
3.1 Design Condition ... 16 
3.2 Reference ... 18 
4. Materials ... 25 
4.1 General Stipulations ... 25 
4.2 Service Temperature of Metallic Materials ... 25 
4.3 Requirement for the Low Temperature Toughness Test of a Metallic Material ... 25 
4.4 Requirements for Application of Materials ... 27 
5.1 General Stipulation ... 30 
5.2 Pipes ... 30 
5.3 Bends and Miter Bends ... 30 
5.4 Piping and Branch Connection ... 31 
5.5 Valves ... 34 
5.6 Flanges ... 35 
5.7 Gaskets ... 35 
5.8 Fasteners ... 36 
5.9 Requirements for selection of the connection structure of piping components ... 36 
5.10 Piping Specialties ... 38 
5.11 Piping Components with the Non-metallic Liner ... 38 
6. Calculation of Pressure-resistance Strength of Metallic Piping Components ... 40 
6.1 General Stipulations ... 40 
6.2 Straight Pipe ... 40 
6.3 Miter Bends ... 41 
6.4 Reinforcement of Branch Connections ... 43 
6.5 Non-standard Reducer ... 49 
6.6 Flat Cover ... 52 
6.7 Special Flange and Blinding Flange ... 53 
7. Determination of Pipe Diameter and Calculation of Pressure Loss ... 55 
7.1 Determination of Pipe Diameter ... 55 
7.2 Pressure Loss in Mono-phase Flow Piping ... 56 
7.3 Pressure Loss of Dual-phase Fluid of Gas-liquid Flow in Piping ... 57 
8. Layout of Piping ... 58 
8.1 Piping on Ground ... 58 
I. General stipulations ... 58 
II. Net overhead height and net distance between pipes ... 58 
III General requirement for layout ... 59 
IV. Requirement for layout of category B fluid piping ... 60 
V. Layout of valves ... 61 
VI. Setting of discharging gas at high point and discharging liquid at low point ... 61 
VII. Position of vents ... 61 
8.2 Piping in Ditch ... 62 
8.3 Underground Buried Piping ... 62 
9. Expansion and Flexibility of Metallic Piping ... 64 
9.1 General Stipulations ... 64 
9.2 Scope and Approach for Calculating Piping Flexibility ... 64 
9.3 Basic Requirement for Flexibility Calculation of Piping ... 64 
9.4 Displacement stress of Piping ... 65 
9.5 Force from the Piping Acts upon Equipment or End Point ... 68 
10. Supporting and Hanger Rack of Piping ... 71 
10.1 General Stipulations ... 71 
10.2 Layout and Maximum Space between Supports and hangers ... 71 
10.3 Load of Supports and Hangers ... 72 
10.4 Materials and Permitted Stress ... 72 
10.5 Design and Selection of Support and Hanger Structure ... 72 
11. Requirement by Designing upon Components Fabrication, Piping Construction and
Inspection ... 76 
11.1 General Stipulations ... 76 
11.2 Welding of Metals ... 76 
11.3 Heat Treatment of Metals ... 76 
11.4 Inspection ... 76 
11.5 Pressure Test ... 76 
11.6 Other Requirements ... 77 
12. Heat Insulation, Acoustical Insulation, Noise Elimination and Anticorrosion ... 79 
12.1 Heat Insulation ... 79 
12.2 Acoustical Insulation and Noise Elimination ... 79 
12.3 Anti Corrosion and Painting ... 80 
13. Supplementary Stipulations for Piping Delivering Category A1 Fluid and Category A2
Fluid ... 81 
13.1 Supplementary Stipulations for Piping Delivering Category A1 Fluid ... 81 
13.2 Supplementary Stipulations for Piping Delivering Category A2 Fluid ... 83 
14. Safety Stipulations for Piping System ... 84 
14.1 General Stipulations ... 84 
14.2 Over Pressure Protection ...