Chiho quality Hebei Industry 304 concentric reducer should be consistent with current national standard "welded steel seamless pipe fittings" diameter steel pipe manufacturers Ankang provisions GB / T 12459-2005, and should meet the following requirements: 1) 304 concentric circles of the size of the head should not exceed 1% of the respective ends of the outer diameter, and the well-being of allowable deviation ± 3mm diameter steel pipe manufacturers, concentric reducer centerline ends should overlap, their eccentricity tolerance of ± . 5mm 2) 304 concentric size head appearance should not have cracks, heavy leather wall thickness greater than the thickness of the large diameter end of the pipe section 304 concentric size head inside 12459-2005 standard tolerances DN15-65 caliber: the inside diameter +1.6 -0.8 : ± 0.8 height: ± 2DN80-100 Diameter: ± 1.6 inner diameter: ± 1.6 height: ± 2DN125-200 Diameter: +2.4 -1.6 inner diameter: ± 1.6 height: ± 2DN250-450 Diameter: +4 -3.2 inner diameter: ± 3.2 height : ± 2DN500-800 Diameter: +6.4 -4.8 inner diameter: ± 4.8 height: DN500-600 ± 2 DN650-750 ± 3 DN800 ± 5 wall thickness of not less than 87.5% of nominal wall thickness roundness deviation of the absolute value of the sum of the positive and negative . But generally below 500 roundness within 4MM. Quality 15316L head size should be consistent with existing national standards, size, head size tolerances shall comply with standards. Roundness head size should not exceed 1% of the respective ends of the outer diameter of the eccentric head appearance should not have cracks, heavy leather, steel wall thickness greater than the wall thickness of the well-being of large diameter end of the pipe section diameter pipe manufacturer, and tolerance to ± 3mm; concentric size head centerline ends should overlap, their eccentricity tolerance of ± 5mm. Hebei Chiho industry standard carbon steel pipe diameter pipe, different ends of the nozzle diameter for connecting different diameters of pipe or flange reducers. Concentric reducer ends of the nozzle, the center on the same axis, adjustable time, the position of the axis of the tube, then calculate the diameter being of steel tube manufacturers, the position of the tube constant, generally used for gas or liquid pipeline vertical adjustable. Steel eccentric reducer ends of the nozzle circumference cut inside the pipe is generally used for liquid level. Diameter carbon steel pipe manufacturers, Hebei Chiho (online consultation), the well-being of carbon steel reducer by Chiho Pipe Co., Ltd. Hebei. Hebei Chiho Pipe Co., Ltd. (www.hbqh628.com) (www.hbqh628.com) Hebei Cangzhou, forging leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Hebei Chiho leadership with the staff warmly welcome all inquiries negotiations to create the Hebei Chiho better future.