Seamless Steel Pipe

    When the whole or more than half of the steel tube blanks show misalignment, it is usually because:     1. The opening seam is not adjusted properly;     2. The seam pressure roller is not adjusted properly and there is no rounding;     3. The edge is not pre-bent in place.     When the head or tail of the billet shows misalignment, it is usually because:     1. The orientation of the import and export rollers is wrong;     2. The ring frame is wrong;     3. The seam pressure roller is not well rounded, and the orientation error of a single pressure roller;     4. The molding is not good, and the difference between the two ends of the formed tube blank is large;     5. The slit width of the opening is above 150mm;     6. The pressure of the hydraulic system fluctuates.

    Reverse compression bending method: According to the heat treatment deformation law of shaft parts, reverse compression bending in the bending direction of the part to compensate the bending deformation generated after quenching can reduce the amount of straightening work. It is suitable for parts with obvious uneven section and severe deformation.     Static quenching method: The temperature of the quenching coolant must be uniform, and it is in a static state immediately after being homogenized before quenching.     Part design is uniform and symmetrical: The cross-sectional shape design of parts should be as uniform and symmetrical as possible.     Use special quenching jig for quenching: If the section of the part is symmetrical, it can be put into a special jig after the furnace is released, and then the part is quenched into the cooling liquid in the vertical direction.     Heating with embedded salt-bath furnace: The p...

    How to determine the position of the defect in the weld during flaw detection?     After detecting flaw waves in the weld flaw detection, the position of the defect in the actual weld should be determined according to the position of the flaw wave on the oscilloscope. The methods for locating defects are:     1. Sound path positioning method: When the instrument adjusts the scanning speed according to the sound path 1: n, the method used to determine the position of the defect is used.     2. Horizontal positioning method: when the instrument adjusts the scanning speed according to the level 1: n, the method used to determine the position of the defect.     3. Depth positioning method: When the instrument adjusts the scanning speed according to the depth 1: n, the method used to determine the position of the defect.     h ttp://www.xysteelpipe.com/info/How-to-determine-the-location-of-weld-defects-during-inspectio...

    How should the thick wall steel pipes be stacked?     1. Angle steel and channel steel should be stacked in the open air, that is, the mouth should face down, the I-beam should be placed upright, and the I-slot surface of the steel should not face up, so as to prevent the water from rusting.     2. Corresponding channels should be left between the stacks. The inspection channel is generally 0.5m. The access channel depends on the size of the material and the transportation machinery. It is generally 1.5 ~ 2m.     3. The stacking height of thick-walled steel pipes, manual work should not exceed 1.2m, mechanical work should not exceed 1.5m, and stack width should not exceed 2.5m.     4. It is forbidden to store items that have an erosive effect on the steel around the thick-walled steel pipe stacking positions.     5. The bottom of the stack is high. If the warehouse is a concrete floor facing the sun, the height is...

    Flange is a general term for pipe connection devices.     What are the benefits of using flanges? For later maintenance, as long as the flange can be removed for maintenance, this is more convenient.     There are also many flange materials, such as stainless steel flanges, galvanized flanges, etc., depending on the use site and the environment, the flange material requirements will be different.     Flange connection is to connect two pipes, fittings or equipment. It is a detachable joint which is fixed on a flange first, and then a flange gasket is added between the two flanges, and then the two flanges are tightened with bolts to make them tightly combined.     This connection is mainly used for the connection of cast iron pipes, rubber lined pipes, non-ferrous metal pipes and flange valves. Flanges are also used for the connection of process equipment and flanges.