Technical specification for manufacture of boiler steel structures
1 Scope
This standard specifies the requirements of boiler steel structure fabrication and inspection.
This standard is applicable to boiler steel structure columns, beams, vertical braces, horizontal braces, trusses, frameworks, platform stairs, column base plates, anchor bolt fixing frames, buckstays, etc.
2 Normative References
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 700 Carbon structural steels
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 1591 High strength low alloy structural steels
GB/T 3632 Sets of torshear type high strength bolt hexagon nut and plain washer for steel structure
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 Carbon steel wire and flux for submerged arc welding
GB/T 5313 Steel plates with through-thickness characteristics
GB/T 8110 Welding wires for gas shielding arc welding of carbon and low alloy steels
GB/T 10045 Carbon steel flux cored wire
GB/T 12470 Low-alloy steel wire and flux for submerged arc welding
GB/T 14957 Steel wires for melt welding
GB/T 17493 Low alloy steel flux cored electrodes for arc welding
GB/T 22395 Specification for design of boiler steel structures
GB 50661 Code for welding of steel structures
JB/T 1615 Specifications for painting and packing of boiler
JB/T 3223 Rules of quality management of welding materials
JB/T 3375 Rules for receiving acceptance of materials for boiler construction
JB/T 4730.3 Nondestructive testing of pressure equipment Part 3:ultrasonic testing
JB/T 4730.4 Nondestructive testing of pressure equipment Part 4:magnetic particle testing
JGJ 82 Technical specification for high strength bolt connections of steel structures
YB/T 4001.1 Steel bar grating and matching parts Part 1:steel bar grating
3 Terms and Definitions
3.1
main column
it mainly bears the boiler proper load, wind load and seismic action, including the internal columns and external columns of boiler steel structure
3.2
main boiler support level
it is the general name of the girders used to suspend or support the boiler proper load at the top of boiler steel structure
3.3
main girder
it is the girder in the main boiler support level directly transferring the boiler proper load to column
3.4
secondary girder
it is connected with the main girder and transfers load to the main girder
3.5
horizontal split girder
it is composed of upper part and lower part, which are the girders connected by bolts or welds to operate together
3.6
buckstay
it surrounds and is hung on the periphery of the wall of the boiler, and it is a steel structure system to protect the wall of the boiler
4 General Requirements
4.1 The boiler steel structure designed by GB/T 22395 shall be manufactured and inspected according to this standard.
4.2 The manufacturer of boiler steel structure shall have the relevant qualification, and have the effective quality management system and quality control and inspection system.
4.3 The manufacture and acceptance of boiler steel structure shall adopt the qualified measuring instruments which have been subject to metrological verification and calibration.
4.4 Welder (including tack welder) shall have the relevant operation qualification certificate, its welding scope shall not exceed the provision of the qualification certificate, and welding operation shall meet the requirements in the process documents.
4.5 Nondestructive testing operator and adjudicator shall get the relevant qualification certificate by assessment according to the relative regulations.
Foreword IV
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Materials
6 Manufacture
7 Welding
8 Dimensional Deviation
9 Inspection
10 Repair
11 Trial Assembly
12 Rust Removal, Paint and Packaging
13 Mark
14 Quality Certificate
