This technical specification specifies order conditions, tech-regulations, test methods and acceptance of larger-diameter tee forgings.
This standard is applicable to the tee forgings of 300MW or above thermal power generating unit pipeline with nominal outside diameter not less than 400mm. Other forgings like reducer pipe may refer to it.
2 Normative References
GB 150 Steel Pressure Vessels
GB 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis
GB 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB 228 Metallic Materials-Tensile Testing
GB 231 Metallic Materials-Brinell Hardness Test
GB 699 Carbon Constructional Quality Steel-Technical Conditions
GB 2106 Metallic Materials-Charpy (V-notch) Impact Test
GB 3077 Alloy Structure Steel- Technical Requirements
GB 5310 Seamless Steel Tubes and Pipes for High Pressure Boiler
GB 6394 Metal-methods for estimating the average grain size
GB 10561 Steel-Determination of Content of Non-metallic Inclusion-Micrographic Method Using Standard Diagrams
JB 755 Technical Conditions for Pressure Vessel Forgings
JB 3963 Ultrasonic Detection of Pressure Vessel Forgings
JB 3965 Magnetic Particle Inspection of Steel Pressure Vessels
JB 28 Metal-Inspection Method of Microstructure
DL 5007 The Code of Election and Acceptance for Power Plant Construction-Welding section (thermal power plant welding)
3 Order Conditions
3.1 The demander shall indicate the number of this standard, forgings name, order drawing number, number, steel grade and delivery conditions and provide the ordering patterns and tech-regulations and if necessary indicate the key parts of forgings.
3.2 In case of ordering based on this standard, the special requirement shall be indicated in the contract if any.
3.3 Tech-regulations and acceptance of forgings shall meet not only this standard, but the contract requirements.
