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GB 50764-2012 English PDF

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GB 50764-2012: Design code of power piping for power plant
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GB 50764-2012English3689 Add to Cart 20 days [Need to translate] Design code of power piping for power plant Valid GB 50764-2012

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Standard similar to GB 50764-2012

GB/T 16895.36   GB 50169   GB/T 50293   GB/T 16895.25   GB 50229   GB 50762   

Basic data

Standard ID GB 50764-2012 (GB50764-2012)
Description (Translated English) Design code of power piping for power plant
Sector / Industry National Standard
Classification of Chinese Standard P60
Classification of International Standard 27.100
Word Count Estimation 274,270
Quoted Standard GB 567; GB 700; GB/T 901; GB/T 1048; GB 3087; GB/T 3091; GB/T 3323; GB/T 4622.3; GB 5310; GB/T 5785; GB/T 6170; GB/T 6171; GB/T 8163; GB/T 9115; GB/T 9124; GB/T 9125; GB 11345; GB 12241; GB 12242; GB 12243; GB 12348; GB 15558.1; GB 15558.2; GB/T 17116.1;
Regulation (derived from) Ministry of Housing and Urban Notice No. 1396
Issuing agency(ies) Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Summary This Chinese standard applies to power plants within the transport steam, water, gas and flammable, toxic and corrosive liquid or gas medium pipeline design. Does not apply to the following pipeline design: a manufacturer of complete sets of equipment or

GB 50764-2012: Design code of power piping for power plant

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Design code of power piping for power plant UDC GB People's Republic of China National Standard Power plant piping design specifications Issued on. 2012-05-28 2012-10-01 implementation Ministry of Housing and Urban-Rural Development of the People's Republic of China Syndication Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China National Standards of People's Republic of China Power plant piping design specifications Editor Department. China Electricity Council Approved by. Ministry of Housing and Urban-Rural Development of the People's Republic of China Effective Date. October 1, 2012

1 Introduction

This specification is based on the former Ministry of Construction "on the issuance of < 2006 construction standards development, revision plan (second Batch) "notice" (build standard [2006] No. 136) requirements, will be by the China Power Engineering Consulting Group Northeast Electric Power Design Institute Units concerned with the preparation done. This specification preparation process, summarize and absorb our many years of experience and technological achievements of mature and effective in Solicit opinions on the basis of, the final review of the draft. This specification is divided into 14 chapters and six appendices, specific technical contents include. general principles, terminology and symbols, and design conditions Reference design, materials selection of piping components, piping components of strength, choose diameter and hydraulic calculations, pipe Layout, pipe stress analysis calculations, pipe hangers, inspection and testing of welded pipes, pipe insulation, separated Sound overpressure protection, anti-corrosion and paint, plumbing system. In this specification provisions for the mandatory provisions bold mark, it must be strictly enforced. This specification by the Ministry of Housing and Urban responsible for the management and interpretation of the compulsory provisions, China Electricity Council Responsible for the daily management of China Power Engineering Consulting Group Northeast Electric Power Design Institute is responsible for interpreting the specific technical content. In execution Line process, please units with engineering or work practice, conscientiously sum up experiences, opinions and suggestions timely feedback China Power Engineering Consulting Group Northeast Electric Power Design Institute. This specification editor. China Power Engineering Consulting Group Northeast Electric Power Design Institute This specification rationality. Xi'an Thermal Power Research Institute This specification participating units. Tianjin Jinding pipeline Ltd. Bohai Heavy Industry Pipeline Co. The main drafters of this specification. Guo grams, Huang Tao, Ye Fei, Pei Yufeng, Karen Chen, Yao Yufei, Union Square, Iwashi Kui, Liushu Tao, Li Taijiang, Cao Jianfeng, often patriotic, Zhu Yan, Wang Zhong, Shi Lei, in Chang, Li Pei move This specification mainly examiner. Yangzu Hua, Xu Yu-xin, Lin Lei, Wen Ding Kai, Lin slightly, Weng Chu Yan, Wang Xudong, Ma Xinjiang, Liu Li, Deng Chenggang, Yanzhan Liang, Sun red, Zhangyue Chuan, Wang Zhibin, Zhu Hongqing Hu friendship

4 CONTENTS

1 General Provision

2 Nomenclature and Symbol

2.1 Nomenclature 2.2 Symbol

3 Condition and Criterion

3.1 Design Condition 3.2 Design Criterion

4 Materials

4.1 General Requirement 4.2 Operating Temperature 4.3 Allowable Stress 4.4 Application Requirement

5 Selection of Piping Components

5.1 General Requirements 5.2 Pipe 5.3 Elbows and Bends 5.4 Branch Connection 5.5 Flanges 5.6 Gaskets 5.7 Fasteners 5.8 Reducers 5.9 Plugs 5.10 Valves 5.11 Special Components 5.12 Nonmetallic Linings for Piping Components

6 Strength of Piping Components

6.1 General Requirements 6.2 Strength of Pipe 6.3 Strength of Elbows and Bends 6.4 Reinforce of Branch Connections 6.5 Reducers 6.6 Flange and Fitting 56.7 Plugs and Flow-Restricting Orifices

7 Pipe Diameter Choosing and Hydraulic Calculation

7.1 General Requirements 7.2 Pipe Diameter Selection 7.3 Pressure Loss of Single-Phase Fluid Piping 7.4 Pressure Loss of Two-Phase Fluid Piping 7.5 Aperture Calculation of Orifice 7.6 Selection and Calculation of Safety Valve

8 Piping Layout

8.1 General Requirements 8.2 Steam and Water Pipe 8.3 Inflammable or Combustible Medium Pipe 8.4 Toxic Gases and Liquids Pipe 8.5 Corrosive Medium Pipe 8.6 Other Gas Pipe 8.7 Piping outside Main Power Building

9 Stress Analysis and Calculation of Piping

9.1 General Requirements 9.2 Scope and Method of Stress Analysis and Calculation 9.3 Principle Requirements of Stress Analysis and Calculation 9.4 Checking Calculation of Piping Stress 9.5 Compensation Calculation and Cold Spring of the Piping 9.6 Acting Force of Piping to Equipment or Endpoint 10 Supports and Hangers 10.1 General Requirements 10.2 Range Interval of the Supports and Hangers 10.3 Loads of Supports and Hangers 10.4 Style Selection of Supports and Hangers 10.5 Material Selection of Supports and Hangers 10.6 Strength Calculation, Structure Design of the Supports and Hangers 11 Piping Welding 11.1 Welding Material 11.2 Design of Welding Joint 12 Inspection and Testing of Piping 612.1 General Requirements 12.2 Inspection 12.3 Testing 13 Insulation, Noise Isolation, Anticorrosion and Painting 13.1 Insulation 13.2 Noise Isolation and Damping 13.3 Anticorrosion and Painting 14 Overpressure Protection of Piping System 14.1 Overpressure Protection 14.2 Device of Overpressure Protection Appendix A Attribution of General Material Appendix B Nondestructive Examination of Piping Appendix C Hydraulic Calculation Appendix D Flexibility Coefficient and Stress Reinforcement Coefficient Appendix E Calculation of Wind Load and Seismic Load Appendix F Welded Structure and Welding Material Explanation of Wording in This Code List of Quoted Standards Addition. Explanation of Provisions

1 General

1.0.1 In order to implement national technical and economic policies in the design, uniform design standards, improve design quality, promote technological progress Step, so that full use of resources, to ensure safe production, environmental protection, energy conservation and economically rational development of this specification. 1.0.2 This specification transporting steam, water, gas, and explosive, toxic and corrosive fluid suitable for power plant within the scope Or gas pipeline and other media design. It does not apply to pipeline design. 1 pipe manufacturer of complete sets of equipment design or machine belongs; 2 boiler coal smoke wind pipeline system; 3 non-circular pipes and heating pipes ventilation and air conditioning; 4 Underground or indoor plumbing and fire water supply pipeline; 75 foam, carbon dioxide pipelines and other fire-extinguishing systems; 6 various tower, building architecture, tank, equipment and pipeline infrastructure used; 7 nuclear power plant pipes. 1.0.3 This specification design pressure are gauge. 1.0.4 power plant piping design shall comply with this specification, there should be consistent with existing national standards. 82 terms and symbols 2.1 Terminology 2.1.1 pipeline piping The piping components and pipe support devices and other components for transmission, distribution, mixing, separation, discharge, metering Or control fluid flow. 2.1.2 pipeline system piping system Press and fluid design conditions divided into a plurality of pipes connected to a set of pipes, referred to as piping. 2.1.3 piping components piping components Or for the connecting element assembled pipes, including pipes, fittings, flanges, gaskets, fasteners, valves, filters Network and as compensation. 2.1.4 tube pipe or tube Cross-section for conveying fluid circular piping components. 2.1.5 pipe fittings pipe fittings A category of piping components, including the elbow or elbow, tee, took over the seat diameter pipe and seal top. 2.1.6 reducers reducers For changing the diameter of the pipe without changing the pipe fittings Trend. 2.1.7 elbow elbows It has a smaller bending radius for pipe fittings to change the direction of. 2.1.8 elbow bends Having a large bending radius for pipe fittings to change the direction of. 2.1.9 Welding elbow miter elbows Made using pipe or welded steel plate type of bend, the tube having a longitudinal axis is not perpendicular to the miter weld pipe fight Pick from. 2.1.10 branch pipe connecting branch connections Even leads from the main branch manifold structure, including the overall strengthening of the tees and without reinforced welded structure Connection. 2.1.11 hydrophobic collector liquid collecting pocket (drip leg) 9 at the low point of the pipeline gas or steam condensate collection device settings. 2.1.12 pipe hangers pipe supports and hangers Various pipes to withstand the load, displacement and pipeline constraints pipe vibration control, load transfer and load-bearing structure General components or devices, but not including civil structures. 2.1.13 Fixation anchors The piping in the branch at fully constrained hanging points without any linear displacement and angular displacement of the rigid means. 2.1.14 slide bracket sliding supports The piping is supported on the slide plate to withstand the weight of the load and pipeline constraints piping vertical displacement of the branch hanging point Bracket. 2.1.15 rigid hanger rigid hangers To bear the weight load of pipes and tubing hanger constraint in support lifting point vertical displacement. 2.1.16 guide means guides Pipe for guiding in a predetermined direction and restrict displacement of the displacement means in the other direction. Guide for horizontal pipe installation Home also can withstand the weight load of the pipe. 2.1.17 limiter restraints To restrict or limit the piping part in one (or several) direction for suspending the device at the point of displacement. It usually does not Bear the weight load of the pipe. 2.1.18 Constant hangers constant supports and hangers Pipe used to bear the weight of the load, and its carrying capacity does not change with the change of vertical displacement at the point of hanging branch pipes varies, namely Load remains substantially constant hanger. 2.1.19 variable force spring hanger variable spring supports and hangers Pipe used to bear the weight of the load, but with the change of its carrying capacity at the point of hanging branch pipeline vertical displacement varies bomb Of the hanger. 2.1.20 damping device sway brace To control the low frequency high amplitude shaking pipeline or high-frequency low amplitude vibration, but the piping thermal expansion or shrink certain constraints Means. 2.1.21 damping device snubbers Pipeline to withstand seismic loads or impact load, high-speed control piping vibration displacement, while allowing the freedom to piping Thermal expansion and contraction means. 2.1.22 stress increase factor stress intensification factor The maximum bending stress bends, elbows, tees and iso-administered under the action of the moment, produced and subjected to the same Moment ratio of straight pipe to produce the maximum bending stress. Fatigue strength or bends, elbows, reducers and tees of In the same ratio of cyclic bending loads BARS tube fatigue strength. 2.1.23 cold spring cold spring When installing the pipe previously applied to the elastic deformation of the pipe in order to produce the desired initial displacement and stress, to drop Low initial thermal stress and initial hot end of the pipe forces and moments. 2.1.24 Flexible flexibility A piping through its own deformation absorbing thermal expansion, the ability to shrink and other displacement deformation. 2.1.25 supercritical parameters unit supercritical parameter units Main steam pressure is above the critical pressure and a temperature of 600 ℃ or less units. 2.1.26 USC unit high efficiency supercritical parameter units Main steam pressure is above the critical pressure and a temperature of 600 ℃ and above units. 2.2 Symbol A - pipe cross-sectional area; 1A - a cross section of the pipe cross-sectional area; 2A - sectional area of the pipe cross-section 2; bA - reinforcement area reinforcement within the scope of the manifold; hA - within the scope of competence reinforcement reinforcement area; PA - pressure area; rA - needs reinforcement in charge of opening the area; A - reinforcing section; wA - reinforcing the range of interior angle weld area; B - steam compressibility correction factor; b - the beginning and the pipeline terminal pressure ratio; C - additional thickness to corrosion, abrasion and mechanical strength requirements; 1C - pipe wall thickness negative deviation value; 2C - plate thickness negative deviation value; iD - the inner diameter of the pipe or tube; ibD - branch pipe diameter; ihD - director of an inner diameter; mD - diameter pipe mean diameter; DN - male tube or pipe nominal size; oD - pipe or tube outer diameter; obD - branch tube diameter; ohD - director of the outer diameter; d - safety valve minimum flow-through diameter of the interface; dH - Pipeline highly variable; Aperture orifice plate - kd; md - diameter pipe small end average diameter; dp - medium pressure changes; 1d - processed on a charge of branch openings longitudinal centerline dimension; 2d - pipe diameter; Ec-- casting quality factor; 20E - modulus of elasticity of steel at 20 ℃; tE - steel elastic modulus at design temperature; tE - pipe material at the design temperature modulus of elasticity; F - Each safety valve minimum cross-sectional area of the flow of the interface f - stress range reduction factor; kF - critical flow, the restriction orifice opening area; iF - reaction forces at the section i; ixF - x to the component; izF - z force component; G - medium mass flow; g - acceleration of gravity; iG - medium flow at the section i; H - Pipeline starting end and the elevation difference between the terminal; 1H - vertical segment starting end elevation; 2H - the end of the vertical segment elevation; h - the relief valve stem lift; 1h - beginning of medium enthalpy; fh - resistance along the way lost; ih - head minor radius; jh - loss of local resistance; nh - enthalpy of saturated water pressure np; The total pressure drop in the pipeline - wh; I - elbow, elbow wall thickness correction factor; i - stress increase factor; K '- coefficient and structure of the head; PNK - nominal conversion factor; Kr-- valves or piping components resistance coefficient; k-- adiabatic index; L-- total pipe length expansion; bL - manifold effective reinforcement range; cbL - effective bearing length of the manifold; Le-- valves and pipe fittings of equivalent length; hL - competent and effective range of half the width of the reinforcement; chL - director effective bearing half length; WL - welds; zL - hanger spacing; ΣLd-- pipe fittings, valves and the equivalent length; AM - own weight and other sustained external loads on the pipe cross-section moment of synthesis; BM - Anti seat thrust valve or relief valve, instantaneous changes in pipeline flow and pressure generated by earthquakes and occasional Load the pipe cross-sectional surface of synthetic moment; cM - at full compensation value and elastic modulus of steel at 20 ℃ calculated thermal expansion caused by the resultant moment; Mj - Synthesis of torque, which is footnote j; Mxj, Myj, Mzj - computing nodes respectively along the x, y, z coordinate plane moment; m - the wall thickness of the pipe product technical conditions specified allowable negative deviation; m - mass flow rate of the medium; - After the mass flow rate of local transformation pipeline headend; EN - when calculating the thermal expansion stress range E, with the full temperature ET △ alternating times; n - the number of safety valves installed in parallel, Unit.; PN - nominal pressure; p - design pressure; kp0 - stagnation pressure before the orifice; 1p - beginning of pressure; 2p - end pressure; kp2 - pressure after the throttle orifice; atp - atmospheric pressure; IIp - after local transformation pipeline beginning of static pressure; op - beginning of stagnation pressure; 2p - end pressure pipe; ap - local atmospheric pressure; dp - dynamic pressure tube medium; 2dp - pipeline terminal dynamic pressure; dIIp - local transformation after the beginning pressure; cp - critical pressure; gp - working pressure; jP - midspan concentrated load; tP - allowable working pressure at design temperature; ip - media pressure at the section i; At medium pressure section; p - terminal space pressure; p - the rear section of the tube and the head end of the pipe resistance backpressure formed; Q - medium volume flow; sQ - a reference volume flow (at an absolute pressure 101.3kPa, temperature 20 ° C state); q - the weight per unit length of pipeline; bq - flow ratio; cq - coefficient; R - Bend, bend bend radius; ER - Calculation of thermal expansion of the pipeline endpoint force (or torque), at full compensation value and steel at 20 ℃ calculated modulus of elasticity; eR - Reynolds; mR - steel at 20 ℃, the minimum tensile strength, MPa; nR - gas constant; eLR - under the steel at the minimum design temperature yield strength, MPa; pR 2.0 - Design of steel at a temperature of 0.2% of the minimum non-proportional extension strength, MPa; tR - Early pipeline running under the working condition of the device (or end) of thrust (or torque); 20R - Early pipeline running in the cold state of the device (or end) of thrust (or torque); lR - the pipeline strain from equilibrium, in the cold state of the device (or end) of thrust (or torque); rmb-- manifold average radius; nr - saturated water latent heat of vaporization under pressure np; mbr - average radius of the manifold S - minimum wall thickness of the tubes measured; bS - actual wall thickness tee branch pipe (measured) by purchasing a minimum wall thickness or the technical conditions allowed; Sb3-- manifold equivalent wall thickness; hS - actual wall thickness tee supervisor (measured) or by purchasing a minimum wall thickness of the technical conditions permit; Sk-- snow load standard value; mS - minimum wall thickness of the pipe; mbS - the required minimum wall thickness of the manifold; mhS - the required minimum wall thickness in charge; tS - ellipsoid head access to the wall thickness viS - no added value elbow medial wall thickness; voS - no value outside of the wall thickness of the elbow; s - entropy cp pressure when water-saturated; s - Pressure when cp saturated steam entropy; s - Pressure water saturation entropy when ppc ; s - pressure saturated steam is ppc  entropy; T - the thickness; t - temperature; ambt - Calculation installation temperature; W - pipe cross section anti moment; x - steam dryness; X △, Y △, Z △ - Calculation piping along the axes X, Y, Z full line shift compensation value; Y - correction factor; - Tee angle; c-- critical pressure ratio; T-- coefficient of linear expansion of steel from 20 ℃ to operating temperature; '- Pressure pipeline starting end and the end pressure space pressure ratio; β-- pipeline terminal and the beginning of the medium specific volume ratio; Critical hematocrit and hematocrit ratio c-- beginning of the medium; D - steels at the design temperature 105h lasting strength of the average; E - thermal expansion stress range; s - corresponding to the nominal reference stress, it refers to a material in a specified allowable temperature stress; t - the temperature of the steel in the design allowable stress; eq - convert internal pressure stress; L - pipes in working condition by the sustained load, that is the internal pressure, weight and other sustained axial stress produced by external loading Sum; max - the maximum horizontal straight tube bending stress; max - Maximum bending deflection; - Oblique angle; b-- reducer half cone angle; - Tube medium flow rate; c-- critical velocity; i-- medium velocity at the section i; 1 - 1i medium velocity cross section place; m - the average velocity of the pipeline; φ '- and the head structure of the coefficient; - Vapor stream and pipe axis deflection angle; - Kinematic viscosity of the medium; C-- tighter than cold; - Allowable stress correction coefficient; - Media kinematic viscosity; l-- force coefficient; r-- top area of the pipeline distribution coefficient of snow on the top surface of the rectangular pipeline should take μr = 1, circular pipes should be taken μr = 0.4; z-- friction coefficient; v - specific volume of the medium; ov - beginning of stagnation hematocrit; 1v - beginning of hematocrit; 2v - terminal hematocrit; "V - pressure saturated steam when cp specific volume; nv - np specific volume pressure saturated water; nv - np pressure saturated steam specific volume; IIv - after local transformation pipeline beginning of the specific volume of steam; 1-- local resistance coefficient; m-- corresponding to the medium before the orifice plate flow resistance coefficient; t-- total pipeline resistance coefficient; II-- corresponding drag coefficient reducer in big-endian; - Equivalent pipe wall roughness - Local resistance coefficient sum; Σξ-- each pipe fittings, and local resistance coefficient of the valve; - Pipe friction coefficient; y-- along the drag coefficient; -- medium density; m-- vertical segment average density in boiling water; ΔP1-- straight pipe friction pressure loss; p - pipeline terminal pressure  cpp2 and "Thermodynamic Properties of Water and Steam icon" closest to the pressure level of the difference; fp - straight pipe friction pressure loss; kp ...

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