250mm

Technical Reformation of Reheating Furnace for φ 250mm Small Section Rolling Mill

φ250mm小型轧钢加热炉技术改造

Application of TSC dynamic idle compensation equipment in Φ 250mm mills

TSC动态无功补偿在Φ250mm机组的应用

Investigation concerning accuracy of steel tubes produced by φ 250mm mandrel pipe mill

Φ250mm连轧管机的钢管精度研究

Through miniaturization design of optical system and scanning system , the fiber absolute distance measurement interferometer is reduce to volume of 600mm × 250mm × 250mm .

通过光学系统和扫描系统的小型化设计，设计了体积为600mm×250mm×250mm的光纤绝对测距仪器；

Described in the article are the technological process of rolling Φ 310mm stainless steel shells with the Φ 250mm Diescher piercing mill , and analysis of problems concerning the process .

叙述了在Φ250mm狄塞尔穿孔机上穿轧Φ310mm不锈钢管坯的工艺过程，并对出现的问题进行了分析。

The co-authors introduce the on-line normalizing process for Grade 20G high-pressure boiler pipes hot - rolled with the φ 250mm retained mandrel mill line at Tube-rolling Plant , Tianjin Steel Tube Corp.

天津钢管公司φ250限动芯棒连轧机组浅述介绍了天津钢管公司轧管厂Φ250mm限动芯棒连轧管机组热轧20G高压锅炉管的在线常化工艺。

In this paper the postweld local heat treatment technology of large heat-wall hydrogenation reactor after site welding is studied . The results provide reliable local heat treatment technology and equipment for thick-wall (≤ 250mm ) hydrogenation reactor after field assembly .

本文针对大型热壁加氢反应器现场焊后局部热处理技术进行了研究，研究结果为厚壁（≤250mm）加氢反应器在现场组装提供可靠的局部热处理技术和设备。

METHODS The chromatographic column was C_ ( 18 )( 250mm ), mobile phase was methanol-4.2 % glacial acetic acid solution ( 3 ∶ 7 ) with flow rate 1.0ml · min ~ ( - 1 );

方法色谱柱C18（250mm），流动相：甲醇-4.2%冰醋酸溶液（3∶7），流速：1.0ml。

Method : In the method a KF-C18 ( 4 . 6 × 250mm , 10um ) colunm was adopted , the mobile phase was methanol-acetonitrile-water-triethylamine-glacial acetic acid ( 70 : 10 : 20 : 0.4 : 0 . 6 ) .

方法：以KF-C（18）（4.6×250mmm，10μm）为色谱柱；流动相为甲醇-乙腈-水-三乙胺-冰醋酸（70：10：20：0.4：0.6）；

METHODS : HPLC , colume : YWG C 18 ( 4.6mm × 250mm , 5 μ m ), mobile phase : methanol 0.25 % phosphoric acid ( 80 ∶ 20 ), wavelength : 436nm , flow rate : 1.1ml / min , column temperature : room temperature .

方法：用高效液相法测定，选定YWGC18分析柱（4.6mm×250mm，5μm），流动相：甲醇0.25%磷酸（80∶20），检测波长：436nm，流速：1.1ml/min，柱温：室温。

The chromatographic conditions are as follows : ODS-AM-303 column ( YMC , 4.6mm × 250mm , 5 μ m ) with the temperature of 40 ℃, acetonitrile-water ( 40:60 ) containing 0.1 % trifluoroacetic acid as mobile phase with the flow rate of 1mL / min.

色谱条件为：ODS-AM-303色谱柱（YMC，4.6mm×250mm，5μm），柱温40℃，含0.1%三氟乙酸的乙腈-水（40∶60）为流动相，流速1mL/min。