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Mechanical cleaning of welded joints and heat-affected zones of pipelines made of high-alloy and corrosion-resistant steels to a roughness of more than Rz 20 μm (V5) and not more than Rz 40 μm (V4) without removing the convexity (reinforcement) of the weld, nominal pipeline diameter, up to 15, wall thickness up to 3 mm

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