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GB 21350-2023: PDF in English
GB 21350-2023
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 27.010
CCS F 01
Replacing GB 21350-2013, GB 29137-2012, GB 29442-2012, GB 29443-2012,
GB 32046-2015
The norm of energy consumption per unit production of
wrought copper and copper alloy
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: JUNE 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Product categories ... 7
5 Levels of allowance of energy consumption ... 7
6 Technical requirements ... 17
7 Statistical scope and calculation methods ... 18
Appendix A (Informative) Standard coal coefficients of various energy sources
(reference values) ... 23
Appendix B (Informative) Standard coal coefficients of main energy-consumed
mediums (in energy source equivalent values) (reference values) ... 25
References ... 26
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents.
This document replaces GB 21350-2013 The norm of energy consumption per unit
products of copper and copper-alloy tube, GB 29137-2012 The norm of energy
consumption per unit products of copper and copper-alloy wire, GB 29443-2012 The
norm of energy consumption per unit product of copper and copper-alloy rod and bar,
GB 29442-2012 The norm of energy consumption per unit products of copper and
copper-alloy sheet, strip, foil, and GB 32046-2015 The norm of energy consumption
per unit products of copper drawing stock for electrical purpose; compared with GB
21350-2013, GB 29137-2012, GB 29442-2012, GB 29443-2012 and GB 32046-2015,
except for structural adjustments and editorial changes, the main technical changes are
as follows:
a) The "advanced value", "access value" and "limit value" are changed to "Level
1", "Level 2" and "Level 3" (see Table 2, Table 3, Table 4, Table 5, Table 6,
Table 7, Table 8, Table 9, and Table 10; see Chapter 4 of GB 21350-2013,
Chapter 4 of GB 29137-2012, Chapter 4 of GB 29442-2012, Chapter 4 of GB
29443-2012, and Chapter 4 of GB 32046-2015);
b) The "allowance of energy consumption for hot working procedure",
"allowance of energy consumption for cold working procedure", "allowance
of energy consumption for finishing process" and "allowance of energy
consumption for annealing process" in "allowance of energy consumption per
unit throughput in an incomplete work company" are merged and changed to
the "allowance of comprehensive energy consumption per unit throughput in
processing procedures" (see Table 2; see Table 3, Table 5 and Table 7 of GB
21350-2013);
c) The requirements for "allowance of energy consumption per unit throughput
in a complete work company" and "allowance of energy consumption per unit
throughput in an incomplete work company" are unified (see Table 2; see
Chapter 4 of GB 21350-2013);
d) "Unit energy consumption in melting and casting procedures" and "unit energy
consumption in processing procedures" are changed to "allowance of
comprehensive energy consumption for unit output of product in the melting
and casting procedures" and "allowance of comprehensive energy
consumption for unit output of product in processing procedures" (see Table
2, Table 3, Table 4, Table 5, Table 6, Table 7, Table 8, and Table 9; see Chapter
4 of GB 21350-2013, Chapter 4 of GB 29137-2012, Chapter 4 of GB 29442-
2012, and Chapter 4 of GB 29443-2012);
e) The index requirements for "allowance of comprehensive energy consumption
for unit output of product in the melting and casting procedures", "allowance
of comprehensive energy consumption for unit output of product in processing
procedures" and "allowance of comprehensive energy consumption for unit
output of product in whole procedures" are changed (see Table 2, Table 3,
Table 4, Table 5, Table 6, Table 7, Table 8, and Table 9; see Chapter 4 of GB
21350-2013, Chapter 4 of GB 29137-2012, Chapter 4 of GB 29442-2012, and
Chapter 4 of GB 29443-2012);
f) "Allowance of all comprehensive energy consumption" is deleted (see Chapter
4 of GB 21350-2013, Chapter 4 of GB 29137-2012, Chapter 4 of GB 29442-
2012, and Chapter 4 of GB 29443-2012);
g) The index requirements for "Level 1", "Level 2" and "Level 3" of allowance
of energy consumption for high copper tubes, high copper bars by the
extrusion method, high copper wires, and high copper sheets, strips and foils
by the hot rolling method are added (see table 2. Table 3, Table 4, and Table
7);
h) The footnotes "the allowance of energy consumption of finned tubes is 1.1
times the corresponding value in the table" and "the allowance of energy
consumption of tubes with an outer diameter not larger than 4 mm is 1.2 times
the corresponding value in the table" are added to the table (see Table 2);
i) The footnote "the allowance of energy consumption of products with the
specifications of 0.2 mm< Φ≤0.8 mm is 2.4 times the corresponding value in
the table; the allowance of energy consumption of products with specifications
of 0.8 mm< Φ≤1.5 mm is 1.8 times of the corresponding value in the table; the
allowance of energy consumption of products with specifications of 1.5
mm< Φ≤3.0 mm is 1.35 times the corresponding value in the table" is added to
the tables (see Table 3, Table 4, Table 5, and Table 6);
j) The tables' footnotes "the allowance of energy consumption of foils with a
thickness less than 0.06 mm is 1.5 times the corresponding value in the table"
are deleted (see Table 2, Table 3, Table 5, Table 6, Table 8, and Table 9 of GB
29442-2012);
k) The footnote "the allowance of energy consumption of foils with a thickness
less than 0.15 mm is 1.2 times the corresponding value in the table" is added
to the table (see Table 9);
l) Product varieties and product standard numbers are added (see Table 11);
The norm of energy consumption per unit production of
wrought copper and copper alloy
1 Scope
This document stipulates the levels of allowance, technical requirements, statistical
scope, and calculation methods for energy consumption per unit throughput of wrought
copper and copper alloy products (hereinafter referred to as energy consumption).
This document applies to the calculation and assessment of per unit throughput energy
consumption of manufacturing enterprises that wrought copper and copper alloy ingots
(billets), tubes, rods, wires, sheets, strips, foils, and the copper drawing stocks for
electrical purposes, as well as energy consumption control for new and expansion
projects.
This document is not applicable to the calculation and assessment of energy
consumption of wrought copper and copper alloy products produced by special
processes such as powder metallurgy, vacuum casting, multi-stage aging, etc.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T 2589 General rules for calculation of the comprehensive energy consumption
GB/T 12723 General principles for establishing allowance of energy consumption
per unit throughput
3 Terms and definitions
The terms and definitions defined in GB/T 2589 and GB/T 12723 apply to this
document.
6 Technical requirements
6.1 General rules
6.1.1 For comprehensive enterprises, assessments shall be conducted separately by
varieties [ingot (billet), tube, bar, wire, sheet, strip, foil, copper drawing stock for
electrical purposes].
6.1.2 Enterprises that only produce a single type of product, or in which the output of a
certain type of product exceeds 80% of the total product output, will be assessed based
on the comprehensive energy consumption for unit output of that type of product.
6.1.3 Manufacturing enterprises with only melting and casting procedures or processing
procedures shall be assessed based on the unit energy consumption of the melting and
casting procedures or processing procedures; manufacturing enterprises with BOTH
melting and casting procedures AND processing procedures shall be assessed based on
the comprehensive energy consumption for unit output of this product in whole
procedures.
6.2 Copper and copper alloy tubes
6.2.1 The allowance of energy consumption per unit throughput of existing copper and
copper alloy tube processing enterprises shall comply with Level 3 in Table 2.
6.2.2 The access value of energy consumption per unit throughput of newly built,
renovated, and expanded copper and copper alloy tube processing enterprises shall
comply with Level 2 in Table 2.
6.3 Copper and copper alloy bars and wires
6.3.1 The allowance energy consumption per unit throughput of existing copper and
copper alloy bar processing enterprises shall comply with Level 3 in Table 3 and Table
5. The allowance energy consumption per unit throughput of existing copper and copper
alloy wire processing enterprises shall comply with Level 3 in Table 4 and Table 6.
6.3.2 The access value of energy consumption per unit throughput of newly built,
renovated, and expanded copper and copper alloy bar processing enterprises shall
comply with Level 2 in Table 3 and Table 5. The access value of energy consumption
per unit throughput of newly built, renovated, and expanded copper and copper alloy
wire processing enterprises shall comply with Level 2 in Table 4 and Table 6.
6.4 Copper and copper alloy sheets, strips, and foils
6.4.1 The allowance of energy consumption per unit throughput of existing copper and
copper alloy sheet, strip, and foil processing enterprises shall comply with Level 3 in
Table 7, Table 8, and Table 9.
6.4.2 The access value of energy consumption per unit throughput of newly built,
renovated, and expanded copper and copper alloy sheet, strip and foil processing
enterprises shall comply with Level 2 in Table 7, Table 8, and Table 9.
6.5 Copper drawing stocks for electrical purposes
6.5.1 The allowance of energy consumption per unit throughput of existing Copper
Drawing Stock for Electrical Purposes processing enterprises shall comply with Level
3 in Table 10.
6.5.2 The access value of energy consumption per unit throughput of newly built,
renovated, and expanded Copper Drawing Stock for Electrical Purposes processing
enterprises shall comply with Level 2 in Table 10.
7 Statistical scope and calculation methods
7.1 Statistical scope
7.1.1 Production system
7.1.1.1 Tubes, bars, wires, sheets, strips and foils
7.1.1.1.1 Melting and casting procedures
Energy consumption from the preparation of raw materials to the output of qualified
ingots (billets), including various energy consumption by production systems such as
batching (including the master alloy), melting, and casting.
7.1.1.1.2 Processing procedures
Energy consumption from the beginning of ingot (billet) casting to the output of
qualified wrought products and warehousing of the finished products.
For tubes, bars and wires, the amount of various energy consumed by production
systems such as ingot (billet) heating, extrusion, sawing, rolling, head making,
continuous extrusion, drawing, forming, finishing, straightening and sizing, annealing,
and packaging is included.
For sheets, strips and foils, the amount of various energy consumed by production
systems such as ingot (billet) heating, hot rolling, shearing (sawing), cold rolling, shape
control (sizing), annealing, and packaging is included.
7.1.1.2 Copper drawing stocks for electrical purposes
7.1.1.2.1 Upward continuous casting method
Energy consumption by production systems from when the cathode copper is put into
the furnace to when qualified drawing stocks are produced and moved into the finished
product warehouse.
7.1.1.2.2 Continuous casting and rolling method
Energy consumption by production systems from when cathode copper (or secondary
copper) is put into the shaft furnace (or reverberatory furnace) to when qualified
drawing stocks are produced and moved into the finished product warehouse.
7.1.2 Auxiliary production system
The amount of energy consumed by equipment and facilities required to assist the
production of wrought copper and copper alloy products, including energy consumed
by wind, oil, water, gas, oxygen and other systems required for production, dust
collection and smoke treatment equipment, instrumentation and environmental
protection facilities, workshop lighting, and internal transportation.
7.1.3 Affiliated production systems
The amount of energy consumed by equipment and facilities required to provide
services in the production process, including energy consumed by factory lighting,
administrative management, physical and chemical testing, tool and mold
manufacturing, maintenance, factory canteens, etc., but excluding household energy
consumption and energy consumption by approved infrastructure (technical
transformation) project.
NOTE: Household energy consumption refers to the energy consumed by dormitories, schools, culture
and entertainment, medical care, business services, and childcare and early childhood education within
the enterprise system.
7.1.4 Energy consumption apportionment and conversion
When calculating the energy consumption of production, auxiliary production, and
affiliated production systems, if the same process route produces multiple types of
products or the same variety of products is produced by multiple process routes, the
total energy consumption of the production, auxiliary production, and affiliated
production systems shall be apportioned and converted according to the output and the
production difficulty of the product.
7.1.5 Energy consumption of waste heat utilization
The energy used by the waste heat utilization device shall be included in the energy
consumption. The part of energy recovered for self-use shall be included in the energy
consumption of the self-use process; the recovered energy shall be deducted if it is
supplied externally or used for other non-production purposes; if it is transferred to
other processes, it shall be included in the energy consumption of the accepting process
(including transfer losses). The waste heat recovered by enterprises shall be counted
according to the waste heat such as steam and hot water recovered and utilized during
the statistical period or the energy converted through waste heat processing to avoid
repeated statistics.
7.2 Calculation method
7.2.1 Comprehensive energy consumption for unit output of product
The comprehensive energy consumption for unit output of product is calculated
according to formula (1):
where:
ez -- the comprehensive energy consumption for unit output of a certain type of a
certain variety of wrought copper, in kilograms of standard coal per ton
(kgce/t);
ki -- the standard coal coefficient of the i-th type of energy (including energy-
consumed mediums) consumed by the production systems during the
statistical reporting period;
ei -- the physical quantity of the i-th type of energy consumed by production
systems (including the amount of energy consumed by energy-consumed
mediums) during the statistical reporting period;
EFZ -- energy consumption of auxiliary production systems during the statistical
reporting period, in kilograms of standard coal (kgce);
EFS -- energy consumption of affiliated production systems during the statistical
reporting period, in kilograms of standard coal (kgce);
EHW -- the amount of recovered energy supplied externally during the statistical
reporting period, in kilograms of standard coal (kgce);
......

BASIC DATA
Standard ID GB 21350-2023 (GB21350-2023)
Description (Translated English) The norm of energy consumption per unit production of wrought copper and copper alloy
Sector / Industry National Standard
Classification of Chinese Standard F01
Classification of International Standard 27.010
Word Count Estimation 19,148
Date of Issue 2023-05-23
Date of Implementation 2024-06-01
Older Standard (superseded by this standard) GB 21350-2013,GB 29137-2012,GB 29442-2012,GB 29443-2012,GB 32046-2015
Administrative Organization National Standardization Management Committee
Proposing organization National Standardization Management Committee
Issuing agency(ies) State Administration for Market Regulation, National Standardization Management Committee