GB/T 16508.2-2022 (GB/T16508.2-2022, GBT 16508.2-2022, GBT16508.2-2022) & related versions
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GB/T 16508.2-2022: PDF in English (GBT 16508.2-2022)
GB/T 16508.2-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.060.30
CCS J 98
Replacing GB/T 16508.2-2013
Shell boilers - Part 2: Materials
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 6
1 Scope ... 8
2 Normative references ... 8
3 Terms, definitions and symbols ... 11
4 Materials for design ... 11
5 Materials for pressure elements ... 13
6 Materials for load-bearing members ... 25
7 Welding material ... 30
Annex A (informative) Elastic modulus, thermal conductivity and expansion coefficient
for commonly used materials ... 32
Annex B (normative) Metallographic inspection for steel forgings ... 34
Bibliography ... 35
Shell boilers - Part 2: Materials
1 Scope
This document specifies the basic requirements, application range (temperature and
pressure) and allowable stress of materials such as pressure elements and load-bearing
members of shell boilers, as well as selection requirements for welding materials.
This document is applicable to the selection and use of materials for pressure elements,
load-bearing members, as well as welding materials of shell boilers defined in GB/T
16508.1.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 150.2, Pressure vessels - Part 2: Materials
GB/T 699, Quality carbon structure steels
GB/T 700, Carbon structural steels
GB/T 711, Hot-rolled quality carbon structural steel plates sheets and strips
GB/T 713, Steel plates for boilers and pressure vessels
GB/T 983, Covered electrodes for manual metal arc welding of stainless and heat-
resisting steels
GB/T 984, Hard facing electrodes for shielded metal arc welding
GB/T 1228, High strength bolts with large hexagon head for steel structures
GB/T 1229, High strength large hexagon nuts for steel structures
GB/T 1230, High strength plain washers for steel structures
GB/T 1231, Specifications of high strength bolts with large hexagon head, large
hexagon nuts, plain washers for steel structures
GB/T 1348, Spheroidal graphite iron castings
GB/T 1591, High strength low alloy structural steels
GB/T 2900.48, Electrotechnical terminology of boilers
GB/T 3077, Alloy structure steels
GB/T 3087, Seamless steel tubes and pipes for low and medium pressure boiler
GB/T 3091, Welded steel pipes for low pressure liquid delivery
GB/T 3274, Hot-rolled plates, sheets and strips of carbon structural steels and high
strength low alloy structural steels
GB/T 3632, Sets of Torshear type high strength bolt hexagon nut and plain washer
for steel structures
GB/T 5117, Covered electrodes for manual metal arc welding of non-alloy and fine
grain steels
GB/T 5118, Covered electrodes for manual metal arc welding of creep-resisting
steels
GB/T 5293, Solid wire electrodes, tubular cored electrodes and electrode/flux
combinations for submerged arc welding of nonalloy and fine grain steels
GB/T 5310, Seamless steel tubes and pipes for high pressure boiler
GB/T 5313, Steel plate with through-thickness characteristics
GB/T 6394, Determination of estimating the average grain size of metal
GB/T 6803, Test method for drop-weight test to determine nil-ductility transition
temperature of ferritic steels
GB/T 8110, Wire electrodes and weld deposits for gas shielded metal arc welding of
non-alloy and fine grain steels
GB/T 8163, Seamless steel pipes for liquid service
GB/T 9439, Grey iron castings
GB/T 9440, Malleable iron castings
GB/T 9711, Petroleum and natural gas industries - Steel pipe for pipeline
transportation systems
GB/T 10045, Tubular cored electrodes for non-alloy and fine grain steels
GB/T 10561, Steel - Determination of content of nonmetallic inclusions -
Micrographic method using standards diagrams
GB/T 12470, Solid wire electrodes, tubular cored electrodes and electrode/flux
combinations for submerged arc welding of creep-resisting steels
GB/T 13298, Inspection methods of microstructure for metals
GB/T 14957, Steel wires for melt welding
GB/T 16507.2, Water-tube boilers - Part 2: Materials
GB/T 16508.1, Shell boilers - Part 1: General requirements
GB/T 17493, Tubular cored electrodes for creep-resisting steels
GB/T 17854, Solid wire electrodes/flux combinations for submerged arc welding of
stainless steels
GB/T 29713, Wire electrodes, strip electrodes, wires and rods for arc welding of
stainless and heat resisting steels
GB/T 32533, Covered electrodes for manual metal arc welding of high-strength
steels
DL/T 439, The technical guide for high-temperature bolt of fossil-fired power plant
JB/T 3223, Welding consumables quality management procedures
JB/T 3375, Rules for receiving acceptance of materials for boiler construction
JB/T 9625, Specification for pressure retaining casting of boiler pipe fittings
NB/T 47008, Carbon and alloy steel forgings for pressure equipment
NB/T 47013.3, Nondestructive testing of pressure equipment - Part 3: Ultrasonic
testing
NB/T 47018 (all parts), Specifications for ordering welding consumables for
pressure equipment
NB/T 47019.3, Purchase technical specification for boiler & heat exchanger
tubes/pipes - Part 3: Non-alloy and alloy steel with specified elevated temperature
properties
YB/T 5092, Stainless steel wire for welding
3 Terms, definitions and symbols
For the purposes of this document, the terms and definitions defined in GB/T 2900.48
and GB/T 16508.1 apply.
4 Materials for design
4.1 Basic requirements
4.1.1 The steel used for boiler pressure elements and load-bearing members welded
with pressure elements shall be killed steel. Elements not specified in the material
standards shall not be added to the material without the consent of the boiler
manufacturer.
4.1.2 The materials and welding materials used for boiler pressure elements and load-
bearing members shall be designations included in national standards or industry
standards. And they shall be the materials specified in this document. If materials other
than those specified are used, they shall comply with the relevant requirements of this
document. The selection of foreign designation materials and new materials shall meet
the requirements of GB/T 16507.2.
4.1.3 The longitudinal room temperature elongation (A) of steel plates, steel pipes and
steel forgings used for boiler pressure elements after tensile tests shall not be less than
18%. The impact absorbed energy (KV2) value of Charpy V-notch impact test at room
temperature shall not be less than 27J.
4.1.4 For steel plates, steel pipes, forgings used for boiler pressure elements, and round
steel for suspenders, when cast billets (including die casting and continuous casting)
are directly used for rolling or forging, the deformation ratio shall not be less than 3.0.
4.1.5 The material manufacturer shall ensure the quality of boiler steel and provide
relevant information on material quality certification. Specific requirements are as
follows:
a) The material manufacturer shall provide the user with the original material quality
certificate according to the corresponding material standards and the provisions
of the order contract. The content of the material quality certificate shall be
complete. The certificate shall be printed with traceable information logo and
stamped with the quality inspection seal of the material manufacturer.
b) When providing materials, the material business operator shall provide the
original material quality certificate, or a copy of the material quality certificate
stamped with the official seal of the supplier and the signature (seal) of the
responsible person.
4.1.6 Boiler manufacturer shall check and accept boiler materials according to the items
specified in JB/T 3375. They can only be used after passing the test. Materials that meet
one of the following conditions can be exempted from physical and chemical and
corresponding non-destructive testing reinspection during acceptance:
a) The acceptance personnel of the material user shall conduct acceptance inspection
at the material manufacturer's according to the procurement technical
requirements. Perform witness signature confirmation on the inspection report or
relevant quality certification documents.
b) For carbon steel and carbon-manganese steel materials for boilers with rated
working pressure less than 3.8 MPa, the physical identification shall be clear and
complete. They shall have a material quality certificate that meets the
requirements of 4.1.5. The quality certificate is consistent with the real thing.
4.1.7 After the version of the material standard is updated, if the performance index or
technical requirements of the material are not modified, the use of the stock material
will not be affected. If the performance index or technical requirements of the material
are changed, the material in stock shall be used only after the changed content is verified
as qualified according to the new version of the standard.
4.2 Pressure elements
4.2.1 The selection of materials is based on the operating conditions of the boiler
(temperature, pressure and other environmental factors). At the same time, consider the
processing technology and equipment conditions of the manufacturer.
4.2.2 Metal materials and welding materials for pressure elements shall have sufficient
strength, plasticity, toughness and good corrosion resistance under service conditions.
Materials for components with frequent changes in working conditions shall have good
fatigue resistance.
4.2.3 The materials selected for non-pressure elements welded with pressure elements
(such as lugs, fins, fins, baffles) shall match the materials they are to be connected to.
4.2.4 Substitute materials shall meet the strength, structure and process requirements of
the original design. They shall be approved by the technical department (including the
design and process department) of the material substitute organization.
4.2.5 The allowable stress of boiler materials can be directly selected from the
corresponding allowable stress table in this document. The allowable stress values
behind the thick solid line in each allowable stress table in this document are calculated
from the enduring strength. The allowable stress of materials not given in this document
shall be calculated according to the provisions of GB/T 16508.1.
4.2.6 The elastic modulus, thermal conductivity and average linear expansion
coefficient of the material can be selected from Annex A.
4.3 Load-bearing members
4.3.1 The steel used in the load-bearing structure shall have the qualified guarantee of
yield strength, tensile strength, elongation after fracture, sulfur and phosphorus content.
A qualified guarantee for carbon equivalent shall be provided for the welded structure.
4.3.2 The steel used for welded load-bearing structures and important non-welded load-
bearing structures shall have the qualification guarantee of cold bending test. The steel
materials used for components that directly bear dynamic loads or need to be checked
for fatigue shall have a qualified guarantee for impact absorption energy.
4.3.3 The steel used in the load-bearing structure shall have good corrosion resistance.
4.4 Welding materials
4.1.1 The model and performance of the welding rod or wire shall be compatible with
the performance of the corresponding base metal. The mechanical properties of the
deposited metal shall meet the design requirements. It shall not be lower than the lower
limit of the corresponding base metal standard.
4.4.2 Low-hydrogen electrodes shall be used for structures that directly bear dynamic
loads or require fatigue checks, as well as thick-plate structures that work in low-
temperature environments.
4.4.3 The selection of welding materials for pressure elements shall comply with the
requirements of NB/T 47018 (all parts).
5 Materials for pressure elements
5.1 Steel plate
5.1.1 The applicable range of working pressure and wall temperature (calculated
temperature) for carbon steel and low alloy steel plates shall comply with the provisions
in Table 1. The allowable stresses of commonly used steel plates are listed in Table 2.
5.1.2 For carbon steel and low alloy steel plates that need to be normalized, normalized
+ tempered or conditioned and tempered in the boiler manufacturing process, the
delivery state of the steel plate manufacturer may be different from that specified in
Table 2. The exit-factory inspection and enter-factory reinspection can be sampled on
the heat-treated steel plate sample block.
5.1.3 For the No. 20 steel plate purchased according to GB/T 711, the lower yield
strength value (ReL) given in the material quality certificate or the tensile test in enter-
factory reinspection shall not be less than 245 MPa.
5.1.4 The steel plate requirements for the boiler shell (drum), furnace liner and header
......
| Standard ID | GB/T 16508.2-2022 (GB/T16508.2-2022) | | Description (Translated English) | Shell boilers - Part 2: Materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J98 | | Classification of International Standard | 27.060.30 | | Word Count Estimation | 29,272 | | Date of Issue | 2022-03-09 | | Date of Implementation | 2022-10-01 | | Drafting Organization | Shanghai Power Generation Equipment Design and Research Institute Co., Ltd., Shanghai Industrial Boiler Research Institute Co., Ltd., Taishan Group Co., Ltd., China Special Equipment Inspection and Research Institute, Shanghai Special Equipment Supervision and Inspection Technology Research Institute, Jiangsu Shuangliang Boiler Co., Ltd., Jiangsu Taihu Boiler Co., Ltd., Suzhou Hailu Heavy Industry Co., Ltd., Nantong Wanda Boiler Co., Ltd., Wuxi Xineng Boiler Co., Ltd., Tianjin Baocheng Machinery Manufacturing Co., Ltd., Shaanxi Construction Engineering Jinniu Group Co., Ltd. | | Administrative Organization | National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC 262) | | Proposing organization | National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC 262) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
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