X80钢级弯管母管典型问题及解决方法  

Typical Problems of X80 Mother Tube for Bend and Relevant Solution

作　　者：赵志伟 郭云龙 陈晓雯 ZHAO Zhiwei;GUO Yunlong;CHEN Xiaowen(Julong Steel Pipe Co.,Ltd.,Qingxian 062658,China;CNPC BEM Oil Production Equipment Co.,Tianjin 300450,China)

机构地区：[1]巨龙钢管有限公司,河北青县062658 [2]中国石油集团渤海石油装备采油装备公司,天津300450

出　　处：《钢管》2023年第1期45-48,共4页Steel Pipe

摘　　要：探讨了X80钢级弯管母管中添加的主要合金元素及其作用,介绍了现阶段X80钢级大壁厚弯管母管在生产过程中和机械性能检测时常出现的一些典型问题,包括母管加热后缩径、屈强比超标,焊接热影响区冲击性能不合格等,分析了造成这些问题的主要原因,并给出了具体的解决途径:适当放大母管外径,对热煨弯管进行扩径;用热模拟试验验证的方法验收母管;焊接母管时,采用低热输入量或多层多道焊接方式等。Discussed here in the essay are the main alloy elements as added into the X80 mother tube for the bend,and the effects thereof.Also elaborated are some current typical problems of the X80 heavy wall mother tube for the bend as often encountered with during the manufacturing process and the mechanical property testing process,including the post-heating over-standard diameter-reduction and the yield ratio,and non-conformance of the welding HAZ impact energy of the mother tube,etc.And main causes for the said problems are analyzed,based on which specific solutions are put forward,including properly enlarging the mother tube OD,expanding the hot bend,accepting the mother tube via the thermal simulation test verification method,and welding the mother tube with the low heat input or multilayer,and multipass welding methods.

关 键 词：弯管母管 X80钢级 合金 屈强比 冲击韧性 缩径 

分 类 号：TE973[石油与天然气工程—石油机械设备]