GB/T 5578-2024Fixed power plant steam turbine specifications (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting:

This document replaces GB/T 5578-2007 "Stationary Power Generation Steam Turbine Specifications": Compared with GB/T 5578-2007, except for the structural adjustment in addition to the integration and editorial changes, the main technical changes are as follows:

a) Deleted some terms and definitions (see Chapter 3);

b) Added "Product Safety" requirements (see Chapter 5);

c) Added the requirement that the buyer should list in detail the load changes during the entire turbine design life [see 6.1:3d)];

d) The method for determining the use of turbine bypass system has been changed (see 6.1:5, 6:1:5 of the:2007 edition);

e) The exhaust absolute pressure requirement for back-pressure steam turbines has been changed (see 6.2:3, 6:2:3 of the:2007 edition);

f) The speed requirements have been changed (see 6.2:5, 6:2:5 of the:2007 edition);

g) Added the requirement that the buyer should provide boundary conditions for abnormal operation of the turbine (see 6.3:3);

h) Added the provision that "materials not specified in domestic or international standards may be agreed upon by the buyer and seller" (see 7.1);

i) The requirements for dynamic balancing of rotors after completion have been changed (see 7.4:1, 7:4:1 of the:2007 edition), and the methods and standards for dynamic balancing have been added:

(see 7.4:1);

j) The critical speed provisions have been changed (see 7.4:2, 7:4:2 of the:2007 edition), and the critical speed calculation requirements have been added (see 7.4:2);

k) Changed the requirements for overspeed test speed (see 7.4:3, 7:4:3 of the:2007 edition);

l) Added that the requirements for electrical faults in regional grid codes should be specified by the purchaser together with appropriate information on grid performance Requirements (see 7.4:4);

m) Added the provisions on the division of mechanical and torsional characteristics of the shaft system (see 7.4:5);

n) The provisions on steam screens for reheat steam turbines have been deleted (see 7.5 of the:2007 edition);

o) The requirements for the surface temperature of the insulation material have been changed (see 7.8, 7:8 of the:2007 edition);

p) Added welding requirements (see 7.9);

q) Added the requirement that the purchaser is responsible for determining the preferred building construction specifications (see 8.1);

r) The following clause has been deleted: The foundation designer should ensure that the foundation designed will not exceed the specified value due to the deflection, natural frequency and other characteristics of the foundation:

Provisions on adverse effects on the operation of the unit within the speed range (see 8.2 of the:2007 edition);

s) Added the requirements for coupling calculation of the damping system of the steam turbine unit and its foundation (see 8.2);

t) The requirement that the purchaser should ensure that the natural frequency of the foundation vibration does not coincide with any low-frequency multiple of the unit's operating speed to form resonance has been deleted:

(See 8.4 of the:2007 edition);

u) Added the requirement that the buyer provide all documents required for basic design (see 8.4);

v) The drive of the feedwater pump has been deleted (see Chapter 9 of the:2007 edition);

w) Added extraction and exhaust steam (see Chapter 9);

x) Changed the description of turbine feedwater reheating (see 9.6:2 and 17:5, Chapter 19 of the:2007 edition);

y) Added general rules for steam turbine auxiliary systems (see 10.1);

z) Changed the oil return temperature requirement for main bearing operation [see 10.2:12, 10:1l of the:2007 edition)];

aa) Added description on how to provide safety valves installed on steam pipes and who specifies their parameters (see 10.4);

ab) Added the requirement that external steam pipes should have sufficient drainage capacity (see 10.5);

ac) Integrate regulation, instrumentation, and protection systems into automatic control (see Chapter 11, Chapters 5, 11, and 12 of the:2007 edition) chapter);

ad) Added general rules and regulations for automatic control (see 11.1 and 11:2);

ae) Added general rules for steam turbine control systems (see 11.3:1);

af) Changed the functional requirements of the regulation system (see 11.3:2, 5:1 of the:2007 edition);

ag) Deleted the droop and sluggish rate characteristics of mechanical regulators (see Table 1 of the:2007 edition);

ah) Added the operating characteristics of the electro-hydraulic control system (see 11.3:5);

ai) Changed the requirements for valve testing (see 11.3:6, 5:4 of the:2007 edition);

aj) Added requirements for steam turbine control system equipment (see 11.3:7);

ak) Added requirements for auxiliary system control (see 11.3:8);

a1) Added requirements for monitoring functions and/or information notification of steam turbine control systems (see 11.3:9);

am) Added general requirements for turbine protection system [see 11.4:1:1d)~11:4:1:1f)];

an) The scope of the automatic protection criteria has been changed (see 11.4:1:2, 12:2:4 of the:2007 edition);

ao) The range of alarm values has been changed (see 11.4:1:3, 12:3 of the:2007 edition);

ap) Deleted the provision that the overspeed protection system of small-power steam turbines should be able to be reset without stopping the machine (see 5.5:4 of the:2007 edition);

aq) Deleted the rule that the overspeed protection device of a large-power steam turbine should be able to reset when the turbine speed drops to not less than the rated speed:

(see 5.5:5 of the:2007 edition);

ar) Added the provision that the overspeed protection system with internal test circuit design does not require a real overspeed test [see 11.4:1:4f)];

as) Added design requirements for protection systems (see 11.4:1:5);

at) The range of standard instruments has been changed (see 11.5:2, 11:2 of the:2007 edition), and the auxiliary steam pressure of the shaft seal system and Auxiliary steam temperature of the shaft seal system (see 11.5:2);

au) The calculation formulas for vibration velocity and peak-to-peak vibration displacement under synchronous vibration (see 13.1 of the:2007 edition) have been deleted;

av) Changed the vibration technical requirements for measuring on the bearing seat (see 13.2, 13:2 of the:2007 edition);

aw) Changed the technical requirements for vibration measured on the shaft (see 13.3, 13:3 of the:2007 edition), and added the requirements for the location and point of measurement:

(see 13.3);

ax) The technical requirements for the hydraulic test have been changed (see 15.2, 15:2 of the:2007 edition), and the requirements for the hydraulic test pressure have been deleted (see 15.2 of the:2007 edition) adds that the hydraulic pressure test should be carried out in accordance with the supplier's standards (see 15.2);

ay) Added provisions for trial operation (see 16.2);

az) Added the characteristics of steam turbine and auxiliary equipment to the design information to be provided by the buyer [see 17.2g) and 17:2h)];

ba) Added conditions for condensers and coolers [see 17.4e)];

bb) Added special requirements for paint in delivery site conditions [see 17.9c)];

bc) Added information that the buyer of the automation system should provide (see 17.11);

bd) Added requirements for the buyer to provide documents, quality monitoring, and design information for risk assessment (see 17.12 to 17:14);

be) Added the requirement that the supplier should provide information on the mass flow transient in the valve when the supercritical steam turbine trips [see 18a)], added the supplier shall provide the feedwater heater system diagram in its scope of supply [see 18c)], and the power required for the operation of the auxiliary system is added:

Requirements for power supply, compressed air and cooling water [see 18g)], and instrumentation and control (I Related information [see 18i) and 18j)];

bf) Deleted the description of the electronic part of the electric-hydraulic control system and overspeed protection device used on steam turbines (see Appendix:2007 Edition):

Record A):

This document is modified to adopt IEC 60045-1:2020 "Steam turbines - Part 1: Specifications":

Compared with IEC 60045-1:2020, this document has many structural adjustments: A comparison of the structural number changes between the two documents See Appendix A for the table:

This document has many technical differences compared with IEC 60045-1:2020:

A list of these technical differences and their reasons is given in Appendix B:

The following editorial changes were made to this document:

--- Change the name of the standard to "Specifications for Steam Turbines for Stationary Power Generation";

--- Added the note for the term "wet steam turbine" (see 3.1:2);

--- Added the note for the term "back pressure turbine" (see 3.1:3);

--- Added the note for the term "condensing steam turbine" (see 3.1:4);

--- Added Note 1 to the term "extraction steam turbine" (see 3.1:5);

--- Added the note for the term "combined cycle steam turbine" (see 3.1:6);

--- Added the note for the term "boundary parameter" (see 3.3:2);

--- Added the note for the term "steam parameters" (see 3.3:3);

--- Added the note for the term "heat rate" (see 3.7:1);

--- Added a note to the term "lifetime" (see 3.11:1);

--- Added the note for the term "speed inequality" (see 3.12:2);

--- Deleted the note on the term "local speed inequality" (see 3.12:3);

--- Added notes on auxiliary system control (11:3:8);

--- Replaced IEC 61511 with informative reference GB/T 21109 (all parts) (see 5.3, 11:4:1:1, 11:4:1:5);

--- Replaced ASMETDP-1 with the informative reference DL/T 834 (see 10.5);

--- Replaced IEC 61000-6-2 with the informative reference GB/T 17799.2 (see 11.2:2);

--- Replaced IEC 61000-6-4 with the informative reference GB/T 17799.4 (see 11.2:2);

--- Replaced IEC 61511-1 with the informative reference GB/T 21109.1 (see 11.2:2);

--- Replaced ISO/IEC 15408 with informative reference GB/T 18336 (all parts) (see 11.2:3):

Introduction

The last version of IEC 60045-1 Steam Turbines Part 1: Specifications was published in:1991: In daily practice, this standard is widely used in steam turbines:

With the rapid development of steam turbine technology in the past 30 years, higher-level steam turbines have been widely recognized:

With the widespread application of steam turbines in the fields of machinery, renewable energy and those requiring more flexible operation capabilities, the relevant technologies are more advanced and mature:

In 2020, IEC 60045-1:2020 Steam Turbine Part 1: Specification was officially released: This standard added product safety content and the integration of content on regulation, control, instrumentation and protection in the first version paves the way for the digitalization of power plants:

GB/T 5578-2007 Specification for Steam Turbines for Stationary Power Generation was revised to adopt IEC 60045-1:1991, which has been issued and implemented for more than ten years:

With the release of the latest version of IEC 60045-1, it is necessary to revise and improve GB/T 5578 to eliminate the technical differences between the current version and the existing technology:

In order to constantly adapt to new changes in the field of steam turbines at home and abroad, and better promote trade, exchanges and technical cooperation:

Specification for steam turbines for stationary power generation

1 Scope

This document specifies the guaranteed values, control, operation and maintenance, and component requirements for steam turbine equipment for high-power stationary power generation:

This document applies to stationary steam turbines used to drive generators, and some provisions also apply to steam turbines for other purposes:

This shall apply to steam turbines of this type and small-power steam turbines:

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document:

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document:

GB/T 3836 (all parts) Explosive atmospheres [IEC 60079 (all parts)] Note: The degree of consistency between GB/T 3836 (all parts) and IEC 60079 (all parts) is shown in Appendix C:

GB/T 5226.1 Electrical safety of machinery Electrical equipment of machinery Part 1: General technical requirements (GB/T 5226.1-2019, IEC 60204-1:2016, IDT) GB/T 6075.3 Mechanical vibration - Measurement and evaluation of vibration of machines on non-rotating parts - Part 3: Vibration of machines with rated power greater than 15 kW Industrial machines with rated speeds between 120r/min and 15000r/min measured on site (GB/T 6075.3-2011, ISO 10816-3:2009, IDT) GB/T 7441 Measurement of spatial noise emitted by steam turbines and driven machinery GB/T 8117 (all parts) Steam turbine thermal performance acceptance test procedures [IEC 60953 (all parts)] Note: The degree of consistency between GB/T 8117 (all parts) and IEC 60953 (all parts) is shown in Appendix C:

GB/T 8117.3 Steam turbine thermal performance acceptance test procedures Part 3: Method C Thermal performance verification test for modified steam turbines Test (GB T8117:3-2014, IEC 60953-3:2001, IDT) GB/T 9239.1 Mechanical vibration steady-state (rigid) rotor balancing quality requirements Part 1: Specification and balance tolerance inspection (GB/T 9239.1-2006, ISO 1940-1:2003, IDT) GB/T 9239.12 Mechanical vibration rotor balancing Part 12: Balancing methods and tolerances for rotors with flexible characteristics (GB/T 9239.12-2021, ISO 21940-12:2016, IDT) GB/T 9239.14 Mechanical vibration rotor balancing Part 14: Procedure for evaluating balancing errors (GB/T 9239.14-2017,ISO 21940-14:2012,IDT) GB/T 9239.31 Mechanical vibration rotor balancing Part 31: Machine imbalance variability and imbalance sensitivity (GB/T 9239.31-2023, ISO 21940-31:2013, IDT) GB/T 11348.2 Mechanical vibration - Measurement and evaluation of vibration of machines on rotating shafts - Part 2: Power greater than 50 MW, rated Working speed 1500r/min, 1800r/min, 3000r/min, 3600r/min Land-mounted steam turbines and generators (GB/T 11348.2-2012, ISO 7919-2:2009, MOD) GB/T 11348.3 Mechanical vibration - Measurement and evaluation of vibration of machines on rotating shafts - Part 3: Coupled industrial machines (GB/T 11348.3-2011, ISO 7919-3:2009, IDT) GB/T 14098 Measurement of airborne noise of gas turbines and gas turbine units Engineering method/simple method (GB/T 14098-