Jerry Tsu
@TsuJerry
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20+ yrs in foreign trade, specializing in industrial manufacturing in China. Your bridge to seamless procurement in China, from design to export.
shijiazhuang city, hebei,China
Joined February 2014
Supports structural integrity: Prevents mold collapse during metal pouring and helps the molten iron solidify into the desired pipe shape without deformation.
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Ensures dimensional accuracy: Maintains the pipe’s inner diameter, wall thickness, and concentricity for proper assembly with other components.
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In casting, the core (used for pipe fittings) plays three key roles: Forms internal cavities/channels: It creates the hollow interior of pipe fittings (e.g., water/gas flow paths) that can’t be shaped by the mold alone.
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The number of manhole covers will match the number of cast iron frames you observed, and they will be shipped overseas together as a complete set.
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Such cast iron covers are usually made via manual production, and their casting precision and surface quality are hard to meet satisfaction. Do you trust hand made products more, or those made by mechanical molding?
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There are customers needing larger-sized manhole covers, but limited by the size of casting equipment, most factories struggle to produce covers larger than 1000mm.
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Can you guess the approximate size of the manhole cover from the photo? The vast majority of manhole covers on the market fall in the range of 700-900mm.
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(thread precision, profile, pitch) to align with design drawings and avoid assembly issues. Sealing Surface Precision: Check that sealing faces (flat, tapered, etc.) at both ends are flat and undistorted to ensure tight fit with gaskets or mating components, preventing leakage.
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Inspection Key Points for Stainless Steel DIN Union Fittings-- Dimensional and Precision Inspection Critical Dimension Measurement: Based on DIN standards (e.g., DIN 2999, DIN 8187), measure nominal diameter, wall thickness, length, and thread specifications
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Just look at the picture below. It's easy to tell: the load-bearing ribs on the back are obviously thicker and taller.
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Quality control is strict at every stage, from semi-finished to finished products. Tools that balance safety and practicality like these truly make a difference in frontline operations. #IndustrialTools #ExplosionProofEquipment #WorkshopRou
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The weight is well-balanced, so they’re not tiring to hold for extended periods. The handle has a shock-absorbing design that effectively dampens recoil when striking. This not only reduces wrist strain but also protects the workpiece surface from damage caused by vibration.
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When you strike with them, no sparks are generated, which significantly reduces explosion hazards during operations.
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Today in the packaging workshop, I saw these brass round-head explosion-proof hammers ready for delivery. Made from non-sparking brass, they’re designed for environments with flammable or explosive risks—like refineries or gas workshops.
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