GB 6479-2013 Translated English of Chinese Standard. GB6479-2013: Seamless steel tubes for high-pressure chemical fertilizer equipmentThis Standard specifies seamless steel tubes for high-pressure for chemical fertilizer equipment in terms of dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate, etc. |
Contents
Dimension Shape and Weight | 9 |
Technical Requirements | 11 |
5 Steel and Iron Determination of Acidsoluble Silicon and Total | 13 |
Etch Test for Macrostructure and Defect of Steels | 14 |
Test Methods | 19 |
Inspection Rules | 20 |
Packaging Marking and Quality Certificate | 21 |
Common terms and phrases
5.2.1 Manufacturing method 5.2.3 Manufacturing method Allowable deviation annealing batch blank shall meet chemical composition circular cross-section sample cold-drawn rolled continuous casting contract contrast tubes Decline Factor deviation of outer-diameter die casting eddy current electric arc furnace Expanding test external refining external surfaces flattening test flux leakage testing Heat treatment system hot rolled hot-rolled forged hot-rolled squeezed Hydraulic test impact absorbed energy impact test inner-diameter inspected and accepted inspection items less than 219mm lower yield strength Macroscopic examination magnetic flux leakage Mechanical properties meet those specified nominal outer-diameter nominal wall-thickness Nondestructive examination nonmetallic inclusion test normalizing 4 Q345Ca normalizing 6 Q345Eb outer-diameter and wall-thickness outer-diameter of steel phase transition plastic elongation strength refining with vacuum requirements of YB/T sample is taken Seller and Buyer specified in Table specified plastic elongation squeezed and extended steel tubes respectively tempering temperature tensile test test pressure tubes shall meet vacuum refining wall-thickness of steel