標準編號:	DL 473-1992
中文名稱:	大直徑三通鍛件技術(shù)條件
英文名稱:	Specification of large-diameter tee forgings
中標分類:	J32    鍛壓
行業(yè)分類:	DL    電力行業(yè)標準
發(fā)布機構(gòu):	中華人民共和國能源部
發(fā)布日期:	1992-6-30
實施日期:	1992-12-1
標準狀態(tài):	superseded
被新標準替代:	DL/T 473-2017 大直徑三通鍛件技術(shù)條件
被替代日期:	2017-12-1
作廢日期:	2017-12-01
翻譯語言:	英文
文件格式:	PDF
中文字符數(shù):	4,000 字
翻譯價格(元):	160.0
交付時間:	付款后 1 個工作日

1 Subject Content and Application Scope 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.

1 Subject Content and Application Scope 2 Normative References 3 Order Conditions 4 Tech-regulations 5 Test Methods 6 Inspection Rules 7 Marking 8 Acceptance Appendix A High Temperature Performance of Forging (Reference) Additional Explanation: