每支球虽铸铁管都要进行严格的在线检测，检测项目包括， 铁水成分、金相，抗拉强度、延伸率、硬度、产品尺寸、产品 外观、水压、水泥内衬厚度、喷锌厚度、喷漆厚度.确保每个 产品都符合标准。

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.

金属锌涂层 Metal zinc coating

金属锌涂层要求每平方米管道***小喷锌量为130g,某一点***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.

沥青涂层 Asphalt coating

外部沥青涂层要求平均厚度不小于70微米.某一点的***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.