The concentric reducer in transfer oil line and some of the bends in the front of radiation section of cylindrical furnace in furfural equipment in a refinery suffered localized corrosion.
针对某炼油糠醛精制装置的抽出油加热炉出现转油线同心异径管及辐射段前流段的弯头局部腐蚀减薄的情况,从管件材料性能、蚀坑形貌、流体特性等多方面进行原因分析,确认主要是气泡冲蚀腐蚀的结果。
Standard system for reducers commonly used at home and abroad was introduced, thirty(30) safety incident cases caused by reducer failure were analyzed from aspects of fitting, welding, erosion, breakage, stress corrosion etc.
介绍了国内外常用异径管标准体系,从管件、焊接、冲蚀、爆裂、应力腐蚀等方面分析了30起由异径管失效而引起的安全事故案例;从失效分析和理论研究方面综述了国内外异径管的研究概况。
Detailed siress analysis was carried out for a section of the pipeline including an eccentric reducer on which long cracks appeared twice.
进而对曾两次出现长裂纹的偏心异径管管段进行细部应力分析。
The tapered pipe in air-cooling accessory line of a certain ammonia synthetic tower was cracked.
某厂氨合成塔冷气副线异径管发生爆裂事故,进行技术检验后分析了爆裂原因,材质为20钢的异径管内是高压富氢介质,氢分压21 MPa,该冷气副线长期处于关闭状态,由于副线中心管填料密封失效,使异径管长期超温工作,异径管在超温高压富氢介质工况下发生了氢腐蚀低应力脆性断裂。
Based on statistics analysis of an invalid tapered pipe with finite element software Pro/MECHANICA,the stress distribution diagram was obtained and cause of tapered pipe failure was found.
利用有限元软件Pro/MECHANICA对一失效的异径管进行了静力学分析,得到了异径管应力分布图,找到了异径管失效的原因。
The formula of circumferential membrane stress of bend reducer under internal pressure has infer according to its two characteristics in structure,one of which is that the radius of cross section of loop should change with the meridian bending angle,and the other is that it is a conical shell.
根据异径弯管横截面管径随经向弯角而变化及其锥形结构的两个特点,推导了内压作用下异径弯管无力矩环向应力式,最大环向应力位于大端内侧。
Based on modem acoustic theory,the data of different diameters pipe temperament by ZHU Zaiyu and the revised data by YANG Yinliu are analyzed and calculated.
以现代声学理论为依据,对朱载培异径管律的数据和杨荫浏的修正数据,从不同角度在大范围内进行了分析和计算。
Research on Meng Kang s Pitch-Pipes of Different Diameters;
西晋孟康异径管律考证──中国古代最早的异径管律管口校正方案
Research on Heat Transfer Enhancement of a Heat Exchanger with Different Diameter Tubes Bundle and Longitudinal Flow;
壳程纵流异径管束换热器强化传热研究
Pro/MECHANICA-based Failure Analysis on Tapered Pipe with Finite Element Method and its Structure Improvement;
基于Pro/MECHANICA的异径管失效分析和结构改进
Detailed siress analysis was carried out for a section of the pipeline including an eccentric reducer on which long cracks appeared twice.
进而对曾两次出现长裂纹的偏心异径管管段进行细部应力分析。
reducing extension piece
异径内外螺纹管接头
Copper tube joints-Reduced tees
GB/T11618.7-1989铜管接头三通异径接头
Copper tube joints-Reducers
GB/T11618.6-1989铜管接头异径接头
Discuss lightly the welding technology of P91+12Cr1MoVG on extra-thick wall big diameter pipe dissimilar steel
P91+12Cr1MoV异种钢超厚壁大径管焊接工艺
Application and Practice of Gas Pipeline Transformation by Passing Smaller Diameter PE Pipe through Old Pipeline
异径穿管技术在燃气管道改造中的应用
Malleable cast iron pipe fittings--Type size--Reducing elbows
GB/T3289.4-1982可锻铸铁管路连接件型式尺寸异径弯头
Malleable cast iron pipe fittings--Type size--Reducing crosses
GB/T3289.21-1982可锻铸铁管路连接件型式尺寸异径四通
ANALYSIS OF DIFFERENCE BETWEEN FIBRIL ANGLES OF RADIAL AND TANGENTIAL WALLS OF CONIFEROUS WOOD TRACHEIDS
针叶材管胞径壁与弦壁纤丝角的差异分析
The Research and Development of the New Heat Exchanger with Different Diameter Tubes and Holding Structure;
新型异径布管夹持结构换热器的研究与开发
The Diameters of the Pulmonary Vein Ostia and the Variations of the Pulmonary Veins by Using 16-detector to Detect;
16层螺旋CT肺静脉开口处管径测量及变异分析
Analysis of Field Coordination on Heat Exchanger Shell Side with Different Diameter Tubes and Holding Structure
异径布管夹持支撑结构换热器壳侧场协同分析
Malleable cast iron pipe fittings--Type size--Reducing male joints (sockets)
GB/T3289.24-1982可锻铸铁管路连接件型式尺寸异径外接头
Malleable cast iron pipe fittings--Type size--Medium-less eccentric reducing tees
GB/T3289.16-1982可锻铸铁管路连接件型式尺寸中小偏心异径三通
Malleable cast iron pipe fittings--Type size--Y Piece reducing(tees)
GB/T3289.18-1982可锻铸铁管路连接件型式尺寸Y型异径三通
