Crown and band castings for francis turbine welded runner
1 Scope
This standard specifies the ordering requirements, manufacturing process, technical requirements, inspection rules and test methods, quality certificates, marking and packaging for the crown and band castings for francis turbine welded runner.
This standard applies to the ordering, manufacturing and inspection of the crown and band castings made through sand casting process.
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 222 Permissible tolerances for chemical composition of steel products
GB/T 223 (All parts) Methods for chemical analysis of iron, steel and alloy
GB/T 228.1 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 229 Metallic materials — Charpy pendulum impact test method
GB/T 231.1 Metallic materials — Brinell hardness test — Part 1: Test method
GB/T 4336 Carbon and low-alloy steel — Spark discharge atomic emission spectrometric method (routine method)
GB/T 6060.1 Roughness comparison specimens — Cast surfaces
GB/T 6414-1999 Castings — System of dimensional tolerances and machining allowances
GB/T 7233.1 Steel castings — Ultrasonic examination — Part 1:Steel castings for general purposes
GB/T 9443 Steel and iron castings — Liquid penetrant inspection
GB/T 9444 Steel and iron castings — Magnetic particle inspection
GB/T 11351 Mass tolerances of casting
GB/T 11352-2009 Carbon steel castings for general engineering purpose
GB/T 20066 Steel and iron — Sampling and preparation of samples for the determination of chemical composition
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3 Order requirements
3.1 The purchaser shall indicate the adopted standard, casting name, material designation, order quantity and supply status in the order contract or technical agreement.
3.2 The purchaser shall provide the order drawings approved by the supplier and the purchaser.
Foreword i
1 Scope
2 Normative references
3 Order requirements
4 Manufacturing process
4.1 Smelting
4.2 Casting
4.3 Heat treatment
4.4 Defect removal and welding repair
4.5 Process machining
5 Technical requirements
5.1 Chemical composition
5.2 Mechanical properties
5.3 Surface quality of castings
5.4 Shape and dimensional tolerances
5.5 Mass tolerances
5.6 Non-destructive testing
6 Inspection rules and test methods
6.1 Chemical composition analysis
6.2 Mechanical property test
6.3 Surface roughness
6.4 Non-destructive testing
6.5 Retests
6.6 Re-heated treatment
7 Quality certificate
8 Marking and packaging
