This document specifies the basic requirements, application scope (temperature and pressure) and permissible stress of pressure parts, load-bearing members and other materials of shell boilers, as well as the selection requirements for welding materials.
This document is applicable to the material selection and use for pressure parts, load-bearing member and welding materials of shell boilers defined by GB/T 16508.1.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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.
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 steel and alloy steel forgings for pressure equipment
NB/T 47013.3 Nondestructive testing of pressure equipments — Part 3: Ultrasonic testing
NB/T 47018
(all parts) Technical permission of welding materials for pressure equipment
NB/T 47019.3 Purchase technical specification for boiler & heater exchanger tubes/pipes — Part 3: Non-alloy and alloy steel with specified elevated temperature properties
YB/T 5092 Stainless steel wires for welding
3 Terms and definitions
For the purpose of this document, the terms and definitions specified in GB/T 2900.48 and GB/T 16508.1 apply.
4 Design and material selection
4.1 Basic requirements
4.1.1 The steel used for boiler pressure parts and load-bearing members welded with pressure parts shall be killed steel, and elements not specified in material standards shall not be added to the materials without the consent of boiler fabrication organization.
4.1.2 The materials for boiler pressure parts and load-bearing members and welding materials shall have the designations included in national or industry standards, and shall be those specified in this document. Materials other than those specified may be used if they meet the relevant requirements of this document; the selection of materials with foreign designations and new materials shall meet the requirements of GB/T 16507.2.
4.1.3 The longitudinal percentage elongation after fracture (A) of steel plates, steel tubes and steel forgings for boiler pressure parts shall not be less than 18% at room temperature after tensile test with standard samples; the absorbed impact energy (KV2) of V-notch Charpy impact test shall not be less than 27J at room temperature.
4.1.4 The deformation ratio of steel plates, steel tubes, forgings and round steel for suspenders used for boiler pressure parts shall not be less than 3.0 when rolled or forged directly with cast billets (including moulded and continuously cast ones).
4.1.5 The material fabrication organization shall ensure the quality of boiler steel and provide relevant data related to material quality certification. The specific requirements are as follows:
a) The material fabrication organization shall provide the original material quality certificate to the user according to the corresponding material standards and the order contract. The material quality certificate shall be complete, printed with traceable information identifier and stamped with the quality inspection seal of the material fabrication organization;
b) When providing materials, the material operation organization shall also provide the original material quality certificate or its copy stamped with official seal of the material supplier and the signature (seal) of the responsible person.
4.1.6 The boiler fabrication organization shall check and accept the boiler materials according to the items specified in JB/T 3375, and cannot use them unless they are
Foreword i Introduction iv 1 Scope 2 Normative references 3 Terms and definitions 4 Design and material selection 5 Materials for pressure parts 6 Materials for bearing components 7 Welding material Appendix A (Informative) Elastic modulus, thermal conductivity and expansion coefficient of common materials Appendix B (Nominative) Metallographic examination for steel forging Bibliography
Shell boilers — Part 2: Materials
1 Scope
This document specifies the basic requirements, application scope (temperature and pressure) and permissible stress of pressure parts, load-bearing members and other materials of shell boilers, as well as the selection requirements for welding materials.
This document is applicable to the material selection and use for pressure parts, load-bearing member and welding materials of shell boilers defined by GB/T 16508.1.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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 Hardfacing 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 for low and medium pressure
GB/T 3091 Welded steel pipes for low pressure liquid delivery
GB/T 3274 Hot-rolled steel plates and strips of carbon structural steels and high strength low alloy structural steels
GB/T 3632 Sets of tor shear 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 non alloy and fine grain steels
GB/T 5310 Seamless steel tubes and pipes for high pressure boiler
GB/T 5313 Steel plates 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 tubes 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 steel and alloy steel forgings for pressure equipment
NB/T 47013.3 Nondestructive testing of pressure equipments — Part 3: Ultrasonic testing
NB/T 47018
(all parts) Technical permission of welding materials for pressure equipment
NB/T 47019.3 Purchase technical specification for boiler & heater exchanger tubes/pipes — Part 3: Non-alloy and alloy steel with specified elevated temperature properties
YB/T 5092 Stainless steel wires for welding
3 Terms and definitions
For the purpose of this document, the terms and definitions specified in GB/T 2900.48 and GB/T 16508.1 apply.
4 Design and material selection
4.1 Basic requirements
4.1.1 The steel used for boiler pressure parts and load-bearing members welded with pressure parts shall be killed steel, and elements not specified in material standards shall not be added to the materials without the consent of boiler fabrication organization.
4.1.2 The materials for boiler pressure parts and load-bearing members and welding materials shall have the designations included in national or industry standards, and shall be those specified in this document. Materials other than those specified may be used if they meet the relevant requirements of this document; the selection of materials with foreign designations and new materials shall meet the requirements of GB/T 16507.2.
4.1.3 The longitudinal percentage elongation after fracture (A) of steel plates, steel tubes and steel forgings for boiler pressure parts shall not be less than 18% at room temperature after tensile test with standard samples; the absorbed impact energy (KV2) of V-notch Charpy impact test shall not be less than 27J at room temperature.
4.1.4 The deformation ratio of steel plates, steel tubes, forgings and round steel for suspenders used for boiler pressure parts shall not be less than 3.0 when rolled or forged directly with cast billets (including moulded and continuously cast ones).
4.1.5 The material fabrication organization shall ensure the quality of boiler steel and provide relevant data related to material quality certification. The specific requirements are as follows:
a) The material fabrication organization shall provide the original material quality certificate to the user according to the corresponding material standards and the order contract. The material quality certificate shall be complete, printed with traceable information identifier and stamped with the quality inspection seal of the material fabrication organization;
b) When providing materials, the material operation organization shall also provide the original material quality certificate or its copy stamped with official seal of the material supplier and the signature (seal) of the responsible person.
4.1.6 The boiler fabrication organization shall check and accept the boiler materials according to the items specified in JB/T 3375, and cannot use them unless they are
Contents of GB/T 16508.2-2022
Foreword i
Introduction iv
1 Scope
2 Normative references
3 Terms and definitions
4 Design and material selection
5 Materials for pressure parts
6 Materials for bearing components
7 Welding material
Appendix A (Informative) Elastic modulus, thermal conductivity and expansion coefficient of common materials
Appendix B (Nominative) Metallographic examination for steel forging
Bibliography
