每支球雖鑄鐵管都要進(jìn)行嚴格的在線(xiàn)檢測，檢測項目包括， 鐵水成分、金相，抗拉強度、延伸率、硬度、產(chǎn)品尺寸、產(chǎn)品 外觀(guān)、水壓、水泥內襯厚度、噴鋅厚度、噴漆厚度.確保每個(gè) 產(chǎn)品都符合標準。

Each ductile iron pipe is subjected to strict on-line inspection. The test items include molten iron composition, metallographic phase, tensile strength, elongation, hardness, dimension, appearance, water pressure, cement lining thickness, zinc spraying thickness and paint spraying thickness to ensure that each product meets the standards.

金屬鋅涂層 Metal zinc coating

金屬鋅涂層要求每平方米管道***小噴鋅量為130g,某一點(diǎn)***小量不低于110g/m²_。

The metal zinc coating requires a minimum zinc spray of 130g per square meter of pipeline and a minimum of not less than 110g/m² at a certain point.

瀝青涂層 Asphalt coating

外部瀝青涂層要求平均厚度不小于70微米.某一點(diǎn)的***小厚度不小于50微米。

The external asphalt coating requires an average thickness of not less than 70 micrometers, and the lowest thickness at a certain point is not less than 50 micrometers.