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  • 发布时间:2020-01-02   来源:  点击量:1386
    标准号:  ASTM B338—17e1
    英文标准名称:  Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers
    国别:  
    标准类型:  美国材料实验协会标准
    发布日期:  null
    实施日期:  2019-09-19
    批准日期:  null
    发布单位:  
    起草单位:  
    标准状态:  现行有效
    中文主题词:  
    英文主题词:  
    摘要:  This specification covers 28 grades of seamless and welded titanium alloy tubes for surface condensers, evaporators, and heat exchangers. Seamless tube shall be made from hollow billet by any cold reducing or cold drawing process that will yield a product meeting the requirements prescribed. Welded tube shall be made from flat-rolled product by an automatic arc-welding process. The welded tube shall be sufficiently cold worked to final size in order to transform the cast weld microstructure into a typical equiaxed microstructure in the weld upon subsequent heat treatment. The titanium shall conform to the chemical requirements prescribed. The room temperature tensile properties of the tube in the condition normally supplied shall conform to the requirements prescribed. Tubing shall withstand, without cracking, flattening under a load applied gradually at room temperature until the distance between the load platens is not more than the required height. Welded tube shall be subjected to a reverse flattening test in accordance with supplement II of test methods and definitions A 370. Welded tubing shall be tested using both a non-destructive electromagnetic test and an ultrasonic test method. Seamless and welded/cold worked tubing shall be tested using an ultrasonic test method. Welded tubing shall be tested with a hydrostatic or pneumatic test method. Seamless tubing shall be tested with an electromagnetic or hydrostatic or pneumatic test method.
    中国标准分类号:  
    国际标准分类号:  
    失效标准号:  ASTM B338—17
    页数:  10
    冷凝器和热交换器用无缝和焊接钛及钛合金管材标准规范
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