Abstract
The article reviews the weldability of clad steel used for protection of inner surface of oil-and-gas pipelines from corrosion by different welding materials. It is indicated that during welding of the root pass by stainless electrodes in one pass the transition structures appear on the interface of two dissimelar metals. This process leads to the formaion of cracks. To reduce negative impact of the transition structures on the characteristics of welded joints it is recommended to weld the first two passes with strainless electrodes.
Highlights
The article reviews the weldability of clad steel used for protection of inner surface of oil-andgas pipelines from corrosion by different welding materials
The research was focused on butt joints of pipes made of low-alloyed ferritic-pearlitic steels Ⱥ -55, 20, and 20kt, with tips on the pipe ends made of a AISI 321 stainless steel [1]
The filling and capping layers were made using LB-52U electrodes designed for welding pipe steels such as Ⱥ -55, 20, and others
Summary
The research was focused on butt joints of pipes made of low-alloyed ferritic-pearlitic steels Ⱥ -55, 20, and 20kt, with tips on the pipe ends made of a AISI 321 stainless steel [1]. The thickness of the pipe parent material was 6 mm; cumulative thickness of stainless steel backing ring was 3.5 mm. Abutting member edges were prepared as per C17 standard 16037 [2] type.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
