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GB 50316-2000: [GB 50316-2008 Edition] Design code for industrial metallic piping Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Similar standardsGB 50316-2000: [GB 50316-2008 Edition] Design code for industrial metallic piping---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/GB50316-2000GB 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. NATIONAL STANDARD OF THE PEOPLE′S REPUBLIC OF CHINA Design Code for Industrial Metallic Piping GB 50316–2000 [2008 revision] Chief Development Department. Former Ministry of Chemical Industry, PRC Approval Department. Ministry of Construction, PRC Implementation Date. January 1, 2001 China Planning Press Beijing 2000 Notice on Issuing the National Standard “Design Code for Industrial Metallic Piping” Construction-standard [2000] No. 199 In line with the requirement of the “Formulation and revision plan of national standards for engineering construction in 1991” by the State Planning Commission (Ji-zong-he [1991] No.290), the “Design Code for Industrial Metallic Piping” formulated by the former Ministry of Chemical Industry jointly with other organizations concerned, reviewed by other organizations concerned, approved as a compulsory national standard, No. GB 50316-2000, is implemented as of January 1, 2001. For this code, the management if the responsibility of the National Bureau of Petroleum and Chemical Industry, and China Global Chemical Engineering Company is responsible to explain in the concrete and the Standard & Quota Research Institution of the Ministry of Construction entrusts China Planning press to publish. Ministry of Construction, PRC September 26, 2000 Table of Contents1.General Stipulations... 6 2.Nomenclature and Symbols... 7 3.Design Condition and Design Reference... 16 4.Materials... 25 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 7.Determination of Pipe Diameter and Calculation of Pressure Loss... 55 8.Layout of Piping... 58 9.Expansion and Flexibility of Metallic Piping... 64 10.Supporting and Hanger Rack of Piping... 71 11.Requirement by Designing upon Components Fabrication, Piping Construction and Inspection... 76 12.Heat Insulation, Acoustical Insulation, Noise Elimination and Anticorrosion... 79 13.Supplementary Stipulations for Piping Delivering Category A1 Fluid and Category A2 Fluid... 81 14.Safety Stipulations for Piping System... 84 Appendix A Allowable Stress for Metal Piping Material... 88 Appendix B Physical Properties of Metal Materials... 99 Appendix C Range of Application Temperature for Non-Metal Lining Materials... 100 Appendix D Stipulations for the Thickness of Steel Pipe and Steel-Made Fittings... 101 Appendix E Flexibility Factor and Stress Intensification Factor... 102 Appendix F Distance Between the Outdoor Underground Pipings and the Railways, Roads and Buildings... 109 Appendix G Stipulations for Pipe Heat Treatment... 110 Appendix H Welding Structures of Piping... 112 Appendix J Non-Destructive Inspection of Piping... 114 Appendix K Description of the Wording in this code... 116 Appendix L Specification on the Test of Heat Insulating Material Used for Austenitic Stainless Steel... 117 Additional Descriptions... 119 1.General Stipulations 1.0.1 This code is prepared for improving design level of industrial metallic pipeworks and ensuring their design quality. 1.0.2 This code is applicable for industrial metallic pipings and those with non-metallic lines working at a nominal pressure below or equal to 42MPa. 1.0.3 This code is not applicable for design of the following pipings. 10.3.1 The pipings attached to the equipment or machines in a whole plant designed by a manufacturer; 1.0.3.2 Pipings in power sector; 1.0.3.3 Long-distance delivering pipings; 1.0.3.4 Pipings in a mine; 1.0.3.5 Pipings for heating, ventilating, and air conditioning, as well as pipings with a noncircular section; 1.0.3.6 The underground or indoor water supply and drainage pipings, and fire extinguishing purpose water supply pipings; 1.0.3.7 Pipings for foam, carbon dioxide, or other type fire extinguishing systems. 1.0.3.8 Urban public pipings. 1.0.4 The pressure used in this code all mean gauge pressures unless otherwise specified. 1.0.5 Design of any industrial metallic piping should meet the stipulations in current national standards concerned, in addition to executing this code. 2.Nomenclature and Symbols 2.1 Nomenclature 2.1.1 Category A1 fluid For the purpose in this code, it refers to the highly toxic fluid that can seriously poison the individual who contacts with or inhale the fluid when a small amount of the fluid leaks out, and cannot be cured even he/she contacts it no any longer. The fluid is corresponding to the (extremely hazardous) toxic substance in Grade I stipulated in for the current national standard “Classification of health hazard levels from occupational exposure to toxic substances”, GB5044. 2.1.2 Category A2 fluid For the purpose in this code, it refers to the toxic fluid that can poison the individual who contacts it to different extents, but he/she may be cured after being out of contact. The fluid is corresponding to the (high, moderately, or lightly hazardous) toxic substance in Grade II or stipulated below in for the current national standard “Classification of health hazard levels from occupational exposure to toxic substances”, GB5044. 3.Design Condition and Design Reference 3.1 Design Condition 3.1.1 Design of a piping should be performed according to process conditions, such as pressure, temperature, characteristics of the fluid and other, taking the circumstance and various load conditions in account. 3.1.2 Determination of the design pressure should meet the following stipulations. 3.1.3 Determination of the design temperature should meet the following stipulations. 3.1.5 A piping should be able to withstand the following dynamic loads. 3.1.5.1 A piping should be able to withstand impact loads caused from hydraulic impact, strike of liquid or solid, and others. 3.1.5.2 An outdoor above grade piping should be able to withstand the wind load. 3.1.5.3 The piping located in an earthquake region should be able to withstand the horizontal force caused by the earthquake, and should conform to the stipulations in current national seismic standard concerned. 3.1.7 Influence of the following thermal expansion or contraction should be analyzed in design. 3.1.7.1 The force and moment from thermal expansion or contraction acted upon the restrained or fixed piping. 3.1.7.2 The stress in and load upon the piping wall from galloping temperature change, or uneven temperature distribution on the piping wall. 3.1.7.3 For the clad or lined piping consists of two different materials, the load caused from difference between the parent layer material and the coating layer material in their thermal expansion properties, and the load caused from difference between the internal and external pipes in a jacketed piping in their temperatures. 3.1.8 Fatigue failure caused from pressure cycling load, temperature cycling load, and/or other cycle-alternating loads upon the piping should be avoided in design. 3.2 Reference 3.2.1 The pressure-temperature rated values of a piping component should conform to the following stipulations. 4.Materials 4.1 General Stipulations 4.1.1 Selection of the material used for a piping must be based on service condition of the piping, including the design pressure, design temperature, and type of the fluid used, and cost, corrosion resistance, as well as weldability, workability, and other properties of the material. 4.1.2 The specification and performances of the material for a piping should meet the stipulations in current national standards. 4.1.3 Application of the materials that are not listed in this code should meet the stipulations in current national standards on the corresponding materials in chemical composition, physical and mechanical properties, manufacturing process and method, heat treatment, and test, as well as other aspects in this code. 4.2 Service Temperature of Metallic Materials 4.3 Requirement for the Low Temperature Toughness Test of a Metallic Material 4.3.1 For the carbon steel, low-alloy steel, middle-alloy steel, and high-alloy ferrite steel used for the piping which design temperature is below or equal to -20°C and higher than the lower limit of the service temperature in Appendix A of this code, their ex-factory materials, weld deposited metals of surface welding, and heat-influence zones should be subject to a low temperature impact test. 4.4 Requirements for Application of Materials 4.4.1 The rolled steel used to manufacture piping components should meet the following stipulations. 4.4.1.1 Q235-A, Q235-B and Q235-C materials are applicable for Categories C and D fluids, and only the design pressure should not be larger than 1.6MPa. Q235-A·F material should be applicable for delivering Category D fluids and piping supports with design pressure less than or equal to 250°C. 4.4.2 The service range of cast iron materials should meet the following stipulations. 4.4.2.1 When spheroidal graphite cast iron is adopted to manufacture a pressurized component, its design temperature should not exceed 350°C, design pressure should not exceed 2.5MPa. In the normal temperature, it is inadvisable that the design pressure exceeds 4.0MPa. 4.4.4.2 For the non-integrally constructed clad metal or lined piping component, the thickness of its parent metallic material should be in line with the thickness from its compression strength calculation, and the calculated thickness should include neither thickness of the coating nor of the liner. 4.4.5 The connection joints, and auxiliary materials, such as daub, solvent, soldering materials, filler, gasket and O-ring, lubricant and sealant for screw thread, and others selected to construct or for a sealed joint should have good compatibility with the above-said materials and the fluid delivered. 5.Selection of Piping Components 5.1 General Stipulation 5.2 Pipes 5.3 Bends and Miter Bends 5.3.1 Application of a circular arc bend should meet the following stipulations. 5.3.2 Adoption of a miter bend should meet the following stipulations. 5.4 Piping and Branch Connection 5.4.1 The pipe fittings used under a severe operation condition should meet the following conditions. 5.4.3 Selection of the prefabricated flange spools should meet the following stipulations. 5.4.4 Selection of welded braches and prefabricated branch connectors should meet the following stipulations. 5.6 Flanges 5.7 Gaskets 5.8 Fasteners 5.8.1 Fasteners used in piping include hexagon headed bolts, bolt studs, gaskets and the like. 5.8.2 Standard fasteners should be selected from those listed in current national standards and the materials used for them should be selected from the materials stipulated in for Appendix A of this code 5.8.3 The material used for the fastener to connect flanges should meet the stipulation in current national standards on flanges and adapt the type of gasket used. 5.8.4 It is unadvisable that the screw-pitch of the thread section of a fastener used to connect flanges is larger than 3mm. The fastener with a diameter over M30 may adopt fine thread. 6.Calculation of Pressure-resistance Strength of Metallic Piping Components 6.1 General Stipulations 6.1.1 Calculation methods listed in this section is suitable for design and calculation of pipe components which are necessary in engineering project design. For pipe components that have been clearly specified with nominal pressure, calculation is not necessary to be done per this section. 6.1.2 Requirement of pressure resistance of standard butt weld pipe components shall be in accordance with 5.4.2.5 of 5.4.2 in this code. 6.1.3 For the calculated thickness of pressure-resistance strength (hereinafter simplified as calculated thickness), the designed thickness is the sum of calculated thickness and the additional thickness; and the nominal thickness refers to the thickness based on calculated thickness plus an additional amount, and then with which a round sum that matches the standard size of the material in use for that component is taken. The effective thickness is the difference from the nominal thickness minus the additional amount. The minimum thickness is the sum of calculated thickness plus the additional amount for corrosion or abrasion. 6.2 Straight Pipe 6.2.1 Calculation of straight pipe that bears internal pressure shall meet the following stipulations. 6.3 Miter Bends 6.3.1Pressure resistance calculation for miter bends (figure 6.3.1) which subjected to internal pressure shall be in accordance with the following stipulations. 7.Determination of Pipe Diameter and Calculation of Pressure Loss 7.1 Determination of Pipe Diameter 7.1.1 Diameter of pipe shall be determined according to the flow rate, characteristics, and flow speed and permitted pressure of the pipe. 7.1.2 Determination for diameter of pipe made of alloy steel and with big diameter shall be done by compression for construction cost and operation cost. 7.1.3 Except for those stipulated otherwise, pipe nominate diameter less than 25 mm shall not be used for liquid which is likely choke the pipe. 7.1.4 Except for those specially required, pipe diameter can be decided per the following methods. 7.1.4.1 Set the average flow velocity, and calculate the internal diameter initially per the following formula, then readjust it according to engineering designing specification, in which pipe size series is designated, to get the actual internal diameter. Finally, recheck actual average flow velocity. 7.1.4.2 Pressure loss of piping shall be calculated and checked by means of actual internal diameter of the pipe Di and the average flow speed so as to confirm the feasibility of the chosen pipe diameter. If the pressure loss does not satisfy, a recalculation shall be performed. 7.1.5 Selection of the average flow speed of piping shall be in accordance with the following stipulations. 7.2 Pressure Loss in Mono-phase Flow Piping 7.2.1 The content of this section is only suitable for calculating the piping pressure loss of fluid of Newton Pattern, including pressure loss due to friction inside straight pipe and partial (local) pressure loss due to friction such as in valves and piping components, excluding calculation for acceleration loss and static pressure loss, etc. 8.Layout of Piping 8.1 Piping on Ground I. General stipulations 8.1.1 Layout of piping shall meet requirement of processing, piping and instrument flow chart. 8.1.2 Layout of piping shall meet requirement of production operation, installation and maintenance. It is suitable to lay the piping overhead with planning and arrangement in neat order. In areas of workshop or processing unit where maintenance is not convenient, piping used for transmitting media which are strong corrosive or category B fluid is not suitable to lay underground. 8.1.3 Piping that tends to expand from heating and contract from cooling shall be laid with flexibility calculation, for which the flexibility range shall not be smaller than that stipulated in this code and stipulations for engineering designing. 8.1.4 Piping layout should be made according to the controlled vibration of piping required by the clause 3.1.5 in this code. II. Net overhead height and net distance between pipes 8.2 Piping in Ditch 8.2.1 Piping in ditch shall meet the following stipulations. 8.3 Underground Buried Piping 8.3.1 Minimum distance between buried piping and railway, road and building shall meet the stipulations in table F, annex F of this code. 8.3.2 The minimum horizontal distance between piping and piping, piping and cable shall meet the stipulations in existing National Standard “Design Procedure for Overall Plane Of Industrial Enterprise” (GB50187). 8.3.3 When piping with large diameter is to be buried deep, requirement of stability and rigidity under soil pressure shall be satisfied. 9.Expansion and Flexibility of Metallic Piping 9.1 General Stipulations 9.1.1 Reaction force and moment from piping against machines that connect the piping shall meet the permitted reaction force and moment put forward by the manufacturer of equipment. In case the specified value is surpassed but possible be solved by discussing, a written permission issued by the manufacturer is needed. Reaction force and moment from piping against the port of pressure vessel shall functions as a mandatory condition in checking the vessel’s strength. 9.1.2 When calculation of flexibility proves that the piping has strong cycling condition, it should be checked with this code for selection of piping components. If the result does not satisfy the requirement, the design should be revised to lower down position-shift stress scope so as to turn the strong cycling condition into a non-strong cycling condition. 9.2 Scope and Approach for Calculating Piping Flexibility 9.2.1 Application scope of calculation for flexibility shall meet the following stipulations. 9.2.2 Approach for flexibility analysis shall meet the following stipulations. 9.3 Basic Requirement for Flexibility Calculation of Piping 9.3.1 Division of calculation for piping system shall meet the following stipulations. 9.3.2 Calculation of flexibility shall meet the following stipulations. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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