Skip to product information
1 of 8

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 16508.2-2022 English PDF (GBT16508.2-2022)

GB/T 16508.2-2022 English PDF (GBT16508.2-2022)

Regular price $470.00 USD
Regular price Sale price $470.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 16508.2-2022 to get it for Purchase Approval, Bank TT...

GB/T 16508.2-2022: Shell boilers - Part 2: Materials

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.
GB/T 16508.2-2022
GB
NATIONAL STANDARD OF THE
PEOPLE 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 and 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

View full details