Company News

  • Pre-welding of straight seam steel pipe

    Pre-welding of straight seam steel pipe

    The joint seam (that is, the forming seam) has no wrong edges or the wrong edges are less than the specified value. Generally, the amount of wrong edges is less than 8% of the plate thickness, and the maximum is not more than 1.5mm.         2. To ensure that the weld has an appropriate penetrat...
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  • Precautions for purchase of straight seam steel pipe

    Precautions for purchase of straight seam steel pipe

    1. Purchasing needs to understand the types of steel pipes: A. Divided by type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc. B. Classification of cross-section shapes of straight seam steel pipes: square pipe, rectangular pipe, elliptical pipe, flat ellipse pipe, semicir...
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  • Process technology of thermally expanded seamless steel pipe

    Process technology of thermally expanded seamless steel pipe

    Diameter expansion is a pressure processing technology that uses hydraulic or mechanical means to apply force from the inner wall of the steel pipe to expand the steel pipe radially outward. The mechanical method is simpler and more efficient than the hydraulic method. Several of the world’...
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  • Pickling passivation method for sanitary stainless steel pipeline

    Pickling passivation method for sanitary stainless steel pipeline

    1. Range of cleaning passivation: pipelines, fittings, valves, etc. belonging to the purified water pipes constructed by our company. 2. Water requirements: The water used in all the following process operations is deionized water, and Party A is required to cooperate in water production operatio...
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  • Three ways to ensure smoothness as required when producing straight seam steel pipe

    Three ways to ensure smoothness as required when producing straight seam steel pipe

    1. Rolling mold: The general method of rolling mold is to press the glass powder into a glass mat. Before the straight seam steel pipe is rolled, the glass mat is clamped between the steel and the center of the rolling mold, to make the glass pad in the center. Under the effect of conflict, the s...
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  • Australian project cooperation

    Australian project cooperation

    With the more and more extensive application of underwater pipelines, Hunan Great has received more orders for underwater projects. Not long ago, Hunan Great successfully get an order of Australian underwater pipeline project.   Customers need seamless pipes and other products in Hunan Great. Th...
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