Submerged arc welding technology is the welding process of SSAW steel pipe and LSAW steel pipe. During the welding process, in addition to insufficient penetration, burn-through and poor formation caused by improper welding process parameters, there will also be pores, slag inclusions, cracks, etc. Defects. This article mainly introduces the main reasons and preventive measures for porosity in submerged…
Read MoreProject Location: Peru Product：SMLS STEEL PIPE with NPT COUPLING Specification：69.3*3.91*5.8M Standard and Material：API 5L PSL1 GR B Usage: Oil Project Inquiry Time：02.2022 Order Time：06.2022 Shipping Time：07.2022 In February 2022, Xinyue Sales Department received an active inquiry from the customer, to provide Peru Oil Company with seamless steel pipes with NPT thread and couplings . Because the terminal is an…
Read MoreSpiral steel pipe(ssaw) is a steel pipe with spiral seam, which is made of strip steel coil as raw material, often warmly extruded, and welded by automatic double-wire double-sided submerged arc welding process. It is mainly used in pipeline transportation of oil, natural gas, bridges, docks, roads, buildings and other projects. Welding is the most common connection method for…
Read MoreInternal thread is a defect that often occurs in skew rolling mills, and the form is full-length and local. The internal thread defect is the trace left by the deformation of the seamless steel pipe every half-turn. When using fixed mandrels and semi-floating mandrels, sometimes internal thread defects are caused by mandrel wear. The internal thread defects of the…
Read MoreWelded steel tube weld pores not only affect the tightness of the pipeline weld and cause pipeline leakage, but also become the induction point of corrosion, which seriously reduces the strength and toughness of the weld. The factors that cause porosity in the weld are: moisture, dirt, oxide scale and iron filings in the flux, welding components and covering…
Read MoreProject Location: Africa Product: Valve Specification：3” 600LB Standard and steel grade: ASTM A216 WCC+ENP Usage：Oil transmission Inquiry time：2022.05.07 Order time：2022.05.09 Delivery time: 2022.06.30 Arrival time：2022.08.10 At the beginning of May, an old African customer sent a message that the oil platform replacement valve supplied by Xinyue had been put into use successfully last year, and once again expressed…
Read MoreNowadays, the surface of the welded tubes we use are required to be coated for corrosion protection. The common anticorrosion coatings for welded tubes are petroleum asphalt, epoxy coal tar asphalt, PE sheath and PE foam sheath, epoxy powder, coal tar enamel and three-layer composite structure. The more used pipe anti-corrosion methods are 3PE composite structure and single-layer powder…
Read MoreBurrs are ubiquitous in the metalworking process. No matter how advanced and sophisticated equipment you use, it will be born with the product. It is mainly due to the plastic deformation of the material and an excess iron filings generated on the edge of the processed material, especially for materials with good ductility or toughness, which are particularly prone…
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.
