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1、H72止回阀钢铁行业利润增长1.2倍，但增幅明显回落今年1-5月份钢铁行业利润同比增长1.2倍，增幅比1-2月份的3.6倍明显回落。一方面，是由于头两个月同期利润基数较低，利润高增长有短期效应；另一方面，是由于钢铁行业产销增速回落，成本有所上升。总体来看，二季度钢材价格继续呈稳中上升态势，利润仍保持较快增长，利润增幅属于正常回落。但我们也注意到，制约下半年钢铁行业利润增长有以下几个不利因素。一是钢铁行业的产销增长对出口的依赖日益加剧。由净进口变为净出口以后，前五个月粗钢净出口同比增量占了国内粗钢生产增量的54%，国际贸易摩擦对钢铁行业未来发展带来许多不确定因素。二是今年4-6月国家四次出台限制
2、钢材出口的政策措施，包括降低出口退税率、加征出口关税、实施出口许可证管理等“组合拳”，力度大，频率高，国内市场反响强烈。首页产品中心H71对夹升降式止回阀一、产品对夹升降式止回阀的详细资料：产品型号：H71产品名称：对夹升降式止回阀产品特点：二、流体力学性能：H71对夹升降式止回阀的体积流量与压力降关系：水的当量体积流量Vw与实际流体的 体积流量v按下式换算：式中：Vw一水的当量体积流量ls;P一流体密度，kgm3v一实际流体的体积流量，Is;v一实际流体的体积流量，Is。 三、流体力学性能：H71对夹双瓣旋启式止回阀的流体阻力系数、流量系数及开启压力：公称通径阀门全开启时的流体阻力系数常温下
3、阀门全开启时的水讲E量系数流体的流向DNNPSKv(m3=h)CV(U.S)CV(U.K)开启压力近似值KPa151/26.42.63.02.5322.5203/45.16.47.56.3322.52544.112.614.812.3322.53211/44.119.723.119.3322.54011/23.829.563.928.9322.55023.554.699.963.5322.56521/23.585.415083.7322.58033.2128286125322.510042.8244286249322.512552.9375439368312.215063.1522611512
4、312.220083.29151070897312.2四、对夹升降式止回阀的型号、材料及主要参数：配管法兰公称压力常规产品型号JB/T74-90GB9112-9124、HG20592-20614PN1.0MPaH71H-10CH71W10PH71W10P8H71W10P3H71W10RH71W10R8H71W10R3PN1.6MPaH71H-16CH71H-16PH71H-16P8H71H-16P3H71H-16RH71H-16R8H71H-16R3PN2.5MPaH71H-25H71H-25PH71H-25P8H71H-25P3H71H-25RH71H-25R8H71H-25R3PN4.0M
5、PaH71H-40H71H-40PH71H-40P8H71H-40P3H71H-40RH71H-40R8H71H-40R3PN6.3MPaH71H-63H71H-63PH71H-63P8H71H-63P3H71H-63RH71H-63R8H71H-63R3PN10.0MPaH71H-100H71H-100PH71H-100P8H71H-100P3H71H-100RH71H-100R8H71H-100R3PN16.0MPaH71H-160H71H-160PH71H-160P8H71H-160P3H71H-160RH71H-160R8H71H-160R3CB/T9112-9124、HG20615-
6、20635、SH3406PN2.0MPaH71H-20C-H71H-20P8H71H-20P3-H71H-20R8H71H-20R3PN5.0MPaH71H-50-H71H-50P8H71H-50P3-H71H-50R8H71H-50R3PN11.0MPaH71H-110-H71H-110P8H71H-110P3-H71H-110R8H71H-110R3PN15.0MPaH71H-150-H71H-150P8H71H-150P3-H71H-150R8H71H-150R3ANSIB16.5Class150H71H-A1C-H71H-A1CP8H71H-A1P3-H71H-A1R8H71H-A1R
7、3Class300H71H-A3-H71H-A3P8H71H-A3P3-H71H-A3R8H71H-A3R3Class600H71H-A6-H71H-A6P8H71H-A6P3-H71H-A6R8H71H-A6R3Class900H71H-A9-H71H-A9P8H71H-A9P3-H71H-A9R8H71H-A9R3主要零件材料阀体WCB(A105)ZG1Cr18Ni9TiCF8(304)CF3(304L)ZG1Cr18Ni12Mo2TiCF8M(316)CF3M(316L)阀瓣2Cr131Cr18Ni9Ti0Cr18Ni900Cr19Ni101Cr18Ni12TMo2i00Cr17Ni12
8、Mo200Cr17Ni14Mo2压圈2Cr131Cr18Ni9Ti0Cr18Ni900Cr19Ni101Cr18Ni12TMo2i00Cr17Ni12Mo200Cr17Ni14Mo2弹簧0Cr18Ni90Cr18Ni90Cr18Ni900Cr19Ni101Cr18Ni12TMo2i00Cr17Ni12Mo200Cr17Ni14Mo2适用工况适月介质水、蒸汽、油品等硝酸等腐蚀性介质强氧化性介质醋酸等腐蚀性介质屎素等腐蚀性介质适用温度（）-29425-196540-196425-196540-196455注：本表为常规对夹式止回阀的型号编制、主要零件材料及适用工况，其他要求及其型号编制参见对夹式止
9、回阀型号编制方法。五、H71对夹升降式止回阀的主要尺寸及重量：公称压女PNMPa公称通径DNmm尺寸(mm)重量(Kg)配管法兰(供参考)LDD2D3D4D5螺栓孔中心圆直径Dl螺栓数量螺栓直径d螺栓长度LlPN1.0MPaPN1.6MPa151652152431400.12654M1275201962193040500.24754M1290252270243647580.34854M1290322883314656680.531004M161004031.593395566780.801104M161055040108486578901.21254M161256546128628095110
10、1.81454M16130805014276961101252.21608M1613510065162951151351503.41808M1615012590192110125132-9.02108M16180150106218127150158-142408M20210PN1.0MPa200140273165200208-242958M20240PN1.6MPa200140273165200208-2429512M20240PN2.5MPa151652152431400.12654M1280201962193040500.24754M1290252272243647580.34854M12
11、90322883314656680.531004M161104031.593395566780.801104M161155040108486578901.21254M1612565461286280951101.81458M16135805014276961101282.21608M1614510060168951151351503.81908M2016012590194110125132-9.22208M24205150106224127150158-152508M24225200140284165200208-2631012M24260PN4.0MPa151652152431400.12654M1280201962193040500.24754M1290252272243647580.34854M1290322883314656680.531004M161104031.593395566780.801104M161155040108486578901.21254M1612565461286280951101.81458M1613580501427696
