Detail of SH/T 3035-2018

Introduction of SH/T 3035-2018

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This guideline was revised by the drafting group according to the requirements of Notice on printing and distributing the development and revision plan on the third batch of professional standards in 2015 (GONGXINTINGKE [2015] No.115) issued by the Ministry of Industry and Information Technology of the People's Republic of China, through extensive investigation, careful summarization of practical experiences, reference to relevant domestic and foreign advanced standards and extensive solicitation of opinions. This guideline consists of 7 clauses and 5 annexes. The main technical contents of this revision are as follows: ——The application scope of this guideline is modified; ——The content of anti-static part is modified; ——The requirements for safe velocity of oxygen, hydrogen, acetylene and other media are added; ——The requirements for prevention of water hammer damage are added; ——The safety factor for pressure drop of two-phase flow pipeline is modified. China Petrochemical Corporation (SINOPEC) is in charge of the administration of this guideline, Process System Design Technology Center Station of China Petrochemical Corporation is responsible for the routine management, and SINOPEC Engineering Incorporation is responsible for the explanation of the specific technical contents. In case of any opinion or suggestion in the process of implementing this guideline, please send it to the routine management organization and the chief development organization. This guideline was issued in 1991 and revised for the first time in 2007. This is the second revision. Guideline for pipeline sizing in petrochemical industry 1 Scope This guideline gives the method for pipeline sizing in petrochemical industry. This guideline is applicable to pipeline sizing in petrochemical industry, and is not applicable to pipeline sizing of non-newtonian fluid, pneumatic and hydraulic transmission pipelines. 2 Normative references The following referenced documents are indispensable for the application of this guideline. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 16912 Safety technical regulation for oxygen and relative gases produced with cryogenic method GB 50031 Norm of acetylene plant design GB 50177 Design code for hydrogen station SH/T 3108 Specifications for design of interconnecting process and thermal piping in petrochemical industry 3 Terms and definitions For the purposes of this guideline, the following terms and definitions apply. 3.1 newtonian fluid fluid whose ratio of shear stress to shear rate is constant and equal to its dynamic viscosity in the flow process 3.2 non-newtonian fluid fluid whose ratio of shear stress to shear rate is not constant in the flow process 3.3 compressible fluid fluid whose density changes with pressure   3.4 incompressible fluid fluid whose density does not change with pressure, or fluid whose density changes but changes very little 3.5 superficial velocity velocity calculated assuming that only one phase of the substance flows in the pipe in a gas-liquid two-phase flow 3.6 homogeneous velocity velocity calculated assuming that the gas phase and the liquid phase in the gas-liquid two-phase flow have the same velocity and can be regarded as a homogeneous mixture 3.7 homogeneous density density calculated assuming that the gas phase and the liquid phase in the gas-liquid two-phase flow have the same velocity and can be regarded as a homogeneous mixture 3.8 homogeneous specific volume specific volume calculated assuming that the gas phase and the liquid phase in the gas-liquid two-phase flow have the same velocity and can be regarded as a homogeneous mixture 3.9 homogeneous viscosity dynamic viscosity calculated assuming that the gas phase and the liquid phase in the gas-liquid two-phase flow have the same velocity and can be regarded as a homogeneous mixture 3.10 void fraction ratio of the flow section area of the gas-phase substance to the cross-sectional area of the entire pipeline in a gas-liquid two-phase flow 4 Main symbols C——the sound velocity di——the inner diameter of pipe G——the mass velocity of fluid Gc——the ultimate mass velocity of two-phase flow at the outlet end of the pipeline Gg——the superficial mass velocity of the gas phase in a two-phase flow Gl——the superficial mass velocity of the liquid phase in a two-phase flow g——the gravitational acceleration L——the length of a straight pipe La——the calculated length of a pipeline Le——the equivalent length of pipe fittings M——the relative molecular mass of gas Ma——the Mach number △P——the pressure drop of a pipeline △Pa——the acceleration pressure drop of two-phase flow △Pc——the pressure drop of regulating valve △Pe——the pressure drop of equipment △Pf——the frictional pressure drop of a pipeline △Ph——the gravity pressure drop of two-phase flow in a vertical or inclined upward pipeline qm——the mass flow rate of fluid qmg——the mass flow rate of the gas phase in a two-phase flow qml——the mass flow rate of the liquid phase in a two-phase flow qv——the volume flow rate of fluid qvg——the volume flow rate of the gas phase in a two-phase flow qvl——the volume flow rate of the liquid phase in a two-phase flow Re——the Reynolds number Reg——the single-phase Reynolds number of the gas phase in a two-phase flow ReH——the homogeneous Reynolds number of a two-phase flow Rel——the single-phase Reynolds number of the liquid phase in a two-phase flow T——the absolute temperature u——the velocity of fluid ugs——the superficial velocity of the gas phase in a two-phase flow uH——the homogeneous velocity of a two-phase flow uls——the superficial velocity of the liquid phase in a two-phase flow W——the work input required to deliver per kilogram of fluid Z——the height α——the void fraction αN——the void fraction used in calculation of acceleration pressure drop β——the volume void fraction of two-phase flow γ——the adiabatic exponent of gas (Gp/Gv) v——the kinematic viscosity of fluid υ——the specific volume of fluid υg——the specific volume of the gas phase in a two-phase flow υH——the homogeneous specific volume of a two-phase flow υl——the specific volume of the liquid phase in a two-phase flow μ——the dynamic viscosity of fluid μg——the dynamic viscosity of the gas phase in a two-phase flow μH——the homogeneous viscosity of a two-phase flow μl——the dynamic viscosity of the liquid phase in a two-phase flow ρ——the density of fluid ρe——the true density of a two-phase flow ρg——the density of the gas phase in a two-phase flow ρH——the homogeneous density of a two-phase flow ρ1——the density of the liquid phase in a two-phase flow λ——the resistance coefficient of the straight pipe ε——the absolute roughness of pipe wall χ——the mass void fraction of a two-phase flow 5 Basic requirements 5.1 The pipeline sizing should be carried out through two stages: preliminary sizing and final determination. 5.2 Pipeline sizing shall meet the following requirements: a) Process production conditions (such as flow rate, level difference, pressure difference); b) Safe delivery of media; c) Noise control; d) Limitation of pipe wall wear; e) The expected comprehensive effect of construction investment and operating costs; f) Standard specifications of pipes. 5.3 The volume flow rate or mass flow rate of the fluid shall be determined according to the maximum flow rate under normal production conditions, and the flow rate of the discharge pipeline shall be determined according to the maximum discharge volume designed for the process system. 5.4 Refer to Annex A for the velocity range of common media in pipelines.

Contents of SH/T 3035-2018

Foreword II 1 Scope 2 Normative references 3 Terms and definitions 4 Main symbols 5 Basic requirements 6 Single phase flow pipeline 6.1 Preliminary sizing for incompressible fluid pipeline 6.2 Determination of diameter of incompressible fluid pipeline 6.3 Determination of diameter of incompressible fluid pipeline 7 Gas-liquid two-phase flow pipeline 7.1 Requirements for pipeline sizing 7.2 Calculation of pressure drop of non-flash two-phase flow pipeline 7.3 Calculation of pressure drop for flash type two-phase flow pipeline Annex A (Informative) Velocity range of common media in pipelines Annex B (Informative) Flow rate and frictional pressure drop of water pipelines Annex C (Informative) Flow rate and frictional pressure drop of oil pipelines Annex D (Informative) Mass flow rate and frictional pressure drop of saturated steam pipelines Annex E (Informative) Flow rate and frictional pressure drop of compressed air pipelines Explanation of wording in this guideline