Media Characteristics: The corrosiveness, temperature, and pressure of the transported medium directly affect material selection. For example, acidic media require stainless steel or alloy steel, high-temperature environments require high-temperature resistant alloys, while neutral water media can use carbon steel or plastic.
Environmental Conditions: Humid environments, salt spray, and chemical pollution accelerate joint corrosion. Coastal areas or chemical plants should prioritize stainless steel or alloy steel joints, while dry indoor environments can use carbon steel joints.
Cost and Lifespan: Stainless steel and alloy steel joints have higher initial costs but longer lifespans and lower maintenance costs; carbon steel joints are cheaper but require regular anti-corrosion treatment; plastic joints have the lowest cost but shorter lifespans. A comprehensive evaluation based on project budget and service life is necessary.
Industry Standards: Different industries have specific specifications for joint materials. For example, the food industry must comply with FDA standards, the petroleum industry with API standards, and the construction industry with GB/T standards. When selecting materials, ensure they meet relevant certification requirements.
