对比了API RP 5L3—2014与SY/T 6476—2013标准中落锤撕裂试验的适用范围、试样制备、设备参数、试验温度和试样评价等主要技术要求。分析认为:这两个标准在落锤撕裂试验取样位置、试验尺寸、试样保温条件和试验结果评定方面存在较大差...对比了API RP 5L3—2014与SY/T 6476—2013标准中落锤撕裂试验的适用范围、试样制备、设备参数、试验温度和试样评价等主要技术要求。分析认为:这两个标准在落锤撕裂试验取样位置、试验尺寸、试样保温条件和试验结果评定方面存在较大差异;API RP 5L3—2014只适用于管线钢管,对试样缺口半径尺寸要求较为宽松,保温介质为液体,不接受异常断口的评定;SY/T 6476—2013适用于管线钢管和制管用板卷、钢板,对试样缺口半径要求严格,保温介质为液体或气体,规范性附录B中规定了异常断口的评定方法。展开更多
介绍了新版的落锤撕裂试验(DWTT)的试验标准API RP 5L3-2014《输送钢管落锤撕裂试验推荐做法》,并与以前的版本API RP 5L3-1996进行了比较。对比发现新版的API RP 5L3-2014《输送钢管落锤撕裂试验推荐做法》仍然延续了API RP 5L3-1996...介绍了新版的落锤撕裂试验(DWTT)的试验标准API RP 5L3-2014《输送钢管落锤撕裂试验推荐做法》,并与以前的版本API RP 5L3-1996进行了比较。对比发现新版的API RP 5L3-2014《输送钢管落锤撕裂试验推荐做法》仍然延续了API RP 5L3-1996的主要技术内容,并与国内的常用的SY/T 6476-2013和GB/T8363-2007仍然有一定差异。展开更多
The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expans...The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expansion coefficient, specific heat, thermal diffusivity and thermal conductivity were experimentally obtained as a function of temperature. The thermal expansion coefficient was determined at temperatures of 20°C to 1200°C in a dilatometer DIL 402 PC. The specific heat was determined on a differential scanning calorimeter at temperatures between 300°C and 1200°C. The diffusivity and thermal conductivity were determined in the temperature range 100°C to 800°C in a 457 LFA diffusivimeter using laser flash technique. The thermal expansion coefficient remained approximately with constant value of 8.5 × 10-6 K-1 and suffered two falls reaching values -25 × 10-6 K-1 and -50 × 10-6 K-1 in the stages of heating and cooling respectively. It was observed for this material, minimum and maximum values of specific heat equal to 0.571 J/gK and 1.084 J/gK at temperatures of 300°C and 720°C, respectively. The behavior of thermal diffusivity and thermal conductivity in the temperature range 100°C to 800°C tends to decrease with increasing temperature. Based on the measured properties, computational modeling of the temperature field can be numerically obtained with better accuracy.展开更多
采用废钢+70%~80%铁水-100 t UHP EAF-双工位120 t LF-VD-连铸-轧制工艺流程生产石油管用钢API5L BNS。通过电弧炉全程泡沫渣操作,EBT出钢合金化,连铸全程保护浇注,大压缩比、无扭微张力轧制,获得钢的良好的低倍组织、夹杂物、表面质量...采用废钢+70%~80%铁水-100 t UHP EAF-双工位120 t LF-VD-连铸-轧制工艺流程生产石油管用钢API5L BNS。通过电弧炉全程泡沫渣操作,EBT出钢合金化,连铸全程保护浇注,大压缩比、无扭微张力轧制,获得钢的良好的低倍组织、夹杂物、表面质量,满足极为严格的微量元素的控制目标,各项指标均满足用户协议要求。展开更多
文摘对比了API RP 5L3—2014与SY/T 6476—2013标准中落锤撕裂试验的适用范围、试样制备、设备参数、试验温度和试样评价等主要技术要求。分析认为:这两个标准在落锤撕裂试验取样位置、试验尺寸、试样保温条件和试验结果评定方面存在较大差异;API RP 5L3—2014只适用于管线钢管,对试样缺口半径尺寸要求较为宽松,保温介质为液体,不接受异常断口的评定;SY/T 6476—2013适用于管线钢管和制管用板卷、钢板,对试样缺口半径要求严格,保温介质为液体或气体,规范性附录B中规定了异常断口的评定方法。
文摘介绍了新版的落锤撕裂试验(DWTT)的试验标准API RP 5L3-2014《输送钢管落锤撕裂试验推荐做法》,并与以前的版本API RP 5L3-1996进行了比较。对比发现新版的API RP 5L3-2014《输送钢管落锤撕裂试验推荐做法》仍然延续了API RP 5L3-1996的主要技术内容,并与国内的常用的SY/T 6476-2013和GB/T8363-2007仍然有一定差异。
文摘The thermophysical properties of API 5L X80 steel were experimentally measured, in order to use these in computational models to determine the temperature field in welded joints. In this work, values of thermal expansion coefficient, specific heat, thermal diffusivity and thermal conductivity were experimentally obtained as a function of temperature. The thermal expansion coefficient was determined at temperatures of 20°C to 1200°C in a dilatometer DIL 402 PC. The specific heat was determined on a differential scanning calorimeter at temperatures between 300°C and 1200°C. The diffusivity and thermal conductivity were determined in the temperature range 100°C to 800°C in a 457 LFA diffusivimeter using laser flash technique. The thermal expansion coefficient remained approximately with constant value of 8.5 × 10-6 K-1 and suffered two falls reaching values -25 × 10-6 K-1 and -50 × 10-6 K-1 in the stages of heating and cooling respectively. It was observed for this material, minimum and maximum values of specific heat equal to 0.571 J/gK and 1.084 J/gK at temperatures of 300°C and 720°C, respectively. The behavior of thermal diffusivity and thermal conductivity in the temperature range 100°C to 800°C tends to decrease with increasing temperature. Based on the measured properties, computational modeling of the temperature field can be numerically obtained with better accuracy.
文摘采用废钢+70%~80%铁水-100 t UHP EAF-双工位120 t LF-VD-连铸-轧制工艺流程生产石油管用钢API5L BNS。通过电弧炉全程泡沫渣操作,EBT出钢合金化,连铸全程保护浇注,大压缩比、无扭微张力轧制,获得钢的良好的低倍组织、夹杂物、表面质量,满足极为严格的微量元素的控制目标,各项指标均满足用户协议要求。
