发展指南 - 香当网

P10

读《环境绩效审计实务指南》有感汇编

读《环境绩效审计实务指南》有感随着经济社会的快速发展，环境问题已成为影响人类生存和发展的重大问题。保护和改善环境成为各国政府义不容辞的责任，强化和完善环境管理成为各国经济发展进程中必不可少的工作。

2019-06-24 1088 0

P13

滁州市五险一金办事指南

滁州市五险一金办事指南一、养老保险参保指南参保条件： 1、城乡居民参保：年满16周岁(不含在校学生)，非国家机关和事业单位工作人员及不属于职工基本养老保险制度覆盖范围的城乡居民，可以在户籍地参加城乡居民养老保险。

2015-11-02 566 0

P18

红河市五险一金办事指南

红河市五险一金办事指南一、养老保险参保指南参保条件： 1、城乡居民参保：年满16周岁(不含在校学生)、非国家机关和事业单位工作人员及不属于职工基本养老保险制度覆盖范围的、具有云南省户籍的城乡居民;

2014-07-17 670 0

P100

PRIMARY AUDIENCE: Research engineersSECONDARY AUDIENCE: Plant, corporate, and design engineersKEY RESEARCH QUESTIONThere is limited information in the open literature regarding the fabrication and performance of dissimilar metalwelds (DMWs) between 9%Cr creep-strength-enhanced ferritic (CSEF) steel and austenitic stainless steelcomponents. Furthermore, the results from the available studies have not established the factors thatcontribute to the fusion line cracking reported for some in-service failures. This report provides examples ofindustry failures in several end-use components and links them to the key contributions from design,operation, fabrication, and metallurgy of DMWs.RESEARCH OVERVIEWThis report provides important guidelines regarding the design, fabrication, and construction of DMWsbetween 9%Cr CSEF steel and austenitic stainless steel components that are designed to transport or collectsteam. This report does not address details specific to the following: overlay welding, such as for corrosionresistance; repair welding, such as might be addressed by the American Society of Mechanical Engineers(ASME) Post Construction Code or the National Board Inspection Code; prescriptive guidance, including howto use particular welding processes; or qualification guidelines addressed by the ASME Boiler and PressureVessel Code, Section IX. Numerous practical considerations exist regarding the specification and fabricationof DMWs, and it is not possible to address all potential concerns regarding this type of connection in thisreport. Instead, this report provides basic guidelines that are important to the goal of promoting “better”practice and providing equipment owners and operators with information to consider regarding additionalrequirements that are relevant to purchasing specifications. Specific factors that affect performance in thecontext of design, fabrication, operation, and metallurgical risk are addressed.KEY FINDINGSThe summary of recommendations in this report provides a concise set of guidelines regarding key aspectsof DMW construction, including restrictions on the end-use application, weld joint geometry, welding process,post-weld heat treatment, transition pieces, operation, and special considerations.WHY THIS MATTERSEvery steam-raising power boiler in a power generating plant is made with a range of different steels. Thepressure boundary joints necessitate welding of the steels. Despite the number of joints that exist, there hasnot been an extensive evaluation of fabrication factors that affect performance in cross-weld creep for DMWsconstructed between 9%Cr CSEF steel and austenitic stainless steel components. This report provides insightinto the factors that contribute to performance with respect to when a weldment fails and how it fails (that is,damage tolerance).9842144EX

2019-02-24 3819 0