The welding process of high-frequency welded steel pipe (erw) is carried out under the condition of fast heating rate and high cooling rate. The rapid temperature change causes a certain welding stress, and the structure of the weld also changes. The structure in the welding center area along the weld is Low-carbon martensite and small area of free ferrite;…
Read MoreStraight seam welded pipe: a steel pipe with the weld seam parallel to the longitudinal direction of the steel pipe. According to the forming process, it is divided into high frequency straight seam steel pipe (erw pipe) and submerged arc welded straight seam steel pipe (lsaw pipe). 1. Construction preparation before use of straight seam welded pipe The pipeline…
Read MoreIn order to ensure that “tube pulling” and “tube stacking” do not occur in the forming section, welding section and sizing section, according to the rolling principle of high-frequency straight seam welded pipe (ERW), it is necessary to ensure that the welded tube blank maintains proper tension in each section. In addition to the pass speed and rolling force,…
Read MoreProject location：Australia Product：ERW Specifications：DN400 STD 18meter Standard and material：API 5L PSL2 X42M Usage：Water Transmission Inquiry time：2021.5 Order time：2021.11 ETD：2022.2 ETA：2022.3 At the end of May 2021, Xinyue received an inquiry from old customers about the project of 18m welded pipe and flange, and the products are used for the local water transmission pipeline project in Australia. After a series…
Read MoreSelection criteria for high frequency welded pipe (ERW) welding consumables Classification of welding rods: (1) Classification by slag properties Welding electrodes can be divided into two categories: acid electrodes and alkaline electrodes. The electrode whose slag is mainly acid oxide is called acid electrode. The electrode whose slag is mainly alkaline oxide and calcium fluoride is called alkaline electrode….
Read MoreWhat are the processing methods of stainless steel welded pipe? What should be paid attention to in processing? Cold drawing deep processing: it is easy to generate friction heat, so the stainless steel pipe with high pressure resistance and heat resistance shall be formed at the same time. After processing, the oil attached to the surface shall be removed….
Read MoreWhat is wrought steel Wrought steel material refers to product forms (forged, rolled, ring rolled, extruded…), while forging is a subset of wrought product form. Difference between wrought steel and forged steel 1.The main difference between wrought and forged steel is strength.Forged steels are tougher than wrought steels as they begin as a casting which is then forged which…
Read MoreStainless steel welded pipes processing is easy to cause certain changes to the inside or outside of stainless steel welded pipes. Stainless steel welded pipe welding: Before processing and welding stainless steel welded pipes, rust, oil, water, paint, etc. that are harmful to welding should be thoroughly removed, and an electrode suitable for the steel grade should be selected….
Read MoreXINYUE STEEL GROUP set up several production bases in Tianjin & Hebei Province, manufacturing ERW Steel Pipe, SSAW Steel Pipe, LSAW Steel Pipe, Seamless Steel Pipe, Scaffolding system and couplers, RHS, SHS, etc.
