ERW Steel Pipe

 As a leading steel mills in Tianjin, China, Tianjin Xinyue Steel Group should try our best to build a better steel world. Then what can we do? First, we must reasonably control the pace of production and strive to maintain market stability. Second, we must unwaveringly resolve excess steel production capacity, and strive to consolidate the output of production; Third, we must take multiple measures to accelerate the steel enterprises to deleverage, and strive to prevent capital risks; Fourth, we must resolutely deal with trade Protectionism challenges and safeguards the interests of the Chinese steel industry. Fifth, we must accelerate the green transformation and upgrading of the steel industry in accordance with the requirements for building beautiful China. http://www.tjxysteel.com/news/What-can-we-do-to-build-a-better-steel-world-342.html

 ASTM A53 Standard refers to seamless and welded steel tube, about surface treatment, it also refers to black and hot-dipped galvanized steel tube. The tube categorized in this standard must be open-hearth, basic-oxygen or electric-furnace processed and must have the following chemical requirements: carbon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum, and vanadium, etc. The tubing shall go through a seamless or welding technique. Tension, bend, and flattening tests shall be performed to make sure that it must adhere to the mechanical properties of the standard. Hydrostatic test shall be applied, without leakage through the weld seam nor the pipe body. Nondestructive electric test shall be made to make sure that the full volume of the tube must be in accordance with the standard. The purchaser shall have the right to perform any of the inspections and tests set forth in this specification where deemed necessary to ensure that the tube conforms to the specifie...

 In terms of supply, the structure of the steel industry in Southeast Asia presents the following characteristics: Only a handful of iron-smelting production capacities are available; steel making is mainly based on electric arc furnace steel making, and production capacity is very limited; rolling capacity is relatively large, and after continuous investment in recent years. The production capacity has grown rapidly, but the deep processing capacity of steel products with added value has not been sufficient. EAF steel making uses scrap as its main raw material, while the small amount of scrap accumulated in South-East Asia and the large amount of imports have created a cost burden. Compared with billets produced in China, South Korea, Japan, and the Commonwealth of Independent States in the long-process model, there is no price advantage. Therefore, for a long time, rolling mills in Southeast Asia are more willing to import low-price billet materials from abroad, resulting in long...

 Internal 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 skew rolling mill are as difficult to avoid as the straight defects in the automatic tube rolling mill, and it is important to reduce them to a minimum. The reasons for the formation of internal threads of seamless steel pipes are generally considered to be analyzed from the following aspects: 1) The surface state of the mandrel, such as mandrel wear, deformation, sticking to metal and iron oxide scale, etc. Because the mandrel participates in the deformation, the defects on the surface of the mandrel must be reflected on the inner wall of the seamless steel pipe, especially when the fixed mandrel and the semi-floating m...

 There are two main types of pipe corrosion, one is uniform corrosion, which means that the whole pipe rusted in some certain degree. The other type is called localized corrosion, it means that maybe the pipe body is not rust yet, but maybe in some point, where there are some acid liquid or other factors that caused corrosion to this point, so on this point, the pipe is rust. Because if the pipe is rusted either for the whole pipe body, or rusted in some point, it may cause pipeline corrosion perforation.Steel corrosion process in the soil is mainly electronic chemical dissolution process due to the formation of corrosion cell. By corrosion of the battery anode and cathode area the size of space, but also the form of thick-walled seamless pipe corrosion is divided into micro-and macro-cell corrosion cell corrosion of two categories. In summary, seamless pipe buried in the soil being the major electronic chemical corrosion, the rusted process is divided into anode and cathode proces...