CR (Corrosion Resistance) and HR (Hydrostatic Resistance) sheets in steel pipes and tubes are critical specifications ensuring durability and safety in various applications. CR sheets are treated or coated to resist corrosion, making them ideal for environments exposed to moisture, chemicals, or harsh conditions. HR sheets are tested for their ability to withstand internal and external pressures without failure, ensuring the structural integrity of pipes and tubes under operational stresses. These sheets are manufactured with precise standards to meet industry requirements for strength, flexibility, and longevity, and are widely used in construction, oil and gas, plumbing, and infrastructure projects. Proper selection and quality assurance of CR and HR sheets are essential for the performance and longevity of steel pipes and tubes.