Shinestar STEEL GROUP CO., LTD

盛仕达 钢铁 股份有限公司

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  • The difference between galvanized products

    The difference between galvanized products

    1) Both the inner and outer walls of the hot-dip galvanized steel pipe are galvanized, while the cold-galvanized steel pipe is only galvanized on the outer wall. 2) The cold plating layer is uniform and the thickness is very thin; the hot plating layer is thick and the thickness is not uniform. ...
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  • Technical Requirement for Welded Steel Pipe

    Technical Requirement for Welded Steel Pipe

    According to the API/ASTM standards, there are many technical requirements for producing welded steel pipe. The nominal pipe diameter ranges from 6-150mm, nominal wall thickness ranges from 2.0-6.0mm and the length of the pipe is usually from 4 to 10. The pipe surface should be smooth, no collaps...
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  • Groove connection pipe fittings

    Groove connection pipe fittings

    Groove connection pipe fittings include two broad categories of products: ①The fittings that play the role of connection sealing include rigid joints, flexible joints, mechanical tees and grooved flanges; ②Pipe fittings for connection transition include elbows, tees, tees, reducers and blind plat...
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  • Common defects in the welding zone of spiral steel pipes

    Common defects in the welding zone of spiral steel pipes

    Common defects in the welding zone of spiral steel pipes bubble Air bubbles mostly occur in the center of the weld bead, and hydrogen is still hidden in the weld metal in the form of air bubbles. The main reason is that the surface of the welding wire and flux has moisture, which is used directly...
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  • Points to note when cutting rectangular tubes

    Points to note when cutting rectangular tubes

    Points to note when cutting rectangular tubes 1. For the place to be cut, wipe off the oil, debris or mud on the surface of the rectangular tube with a rag or soft cloth. 2. Be sure to select special stainless steel cutting tools. 3. According to the construction drawing and the situation on site...
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  • Features of pipeline NDT

    Features of pipeline NDT

    Features of pipeline NDT The characteristic of non-destructive testing is that it can be tested without damaging the material and structure of the test piece. Therefore, after implementing non-destructive testing, the inspection rate of the product can reach 100%. However, not all items and indic...
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  • Welding control of thick-walled steel pipes

    Welding control of thick-walled steel pipes

    1. Welding temperature control of thick-walled steel pipes The welding temperature is affected by the high-frequency eddy current thermal power. The high-frequency eddy current thermal power is affected by the current frequency. The eddy current thermal power is proportional to the square of the ...
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  • Straight seam steel pipe purity improvement

    Straight seam steel pipe purity improvement

    High frequency welded pipe flattening cracking is caused by welding micro cracks, hard and brittle phase inclusions, coarse grain-like structure, etc. In order to control the welding seam well, the concept of welding inclusion crack index is proposed. Mainly caused by insufficient welding strengt...
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  • Preparation for trenchless repair of pipelines

    Preparation for trenchless repair of pipelines

    1. Preset the required materials (and add 1m to the actual demand of the existing pipeline). 2. On-site length measurement of the pipeline. 3. Measure the on-site pipeline, understand the size of the tube well, and measure in all directions and all directions. 4. The inspection of mechanical equi...
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