首次要看nd無縫鋼管的（de）要樣兒。查看明亮和（hé）要樣兒有（yǒu）沒有漏焊和脫帽等要（yào）樣（yàng）兒實際問題。好（hǎo）的nd無縫鋼管要樣兒顏色著名，通常狀況下進行（háng）不肯進（jìn）行金星。 其次點就是說看材料。化持續學成分是nd無縫鋼管的現有基礎。進行檢查化持續學成分有沒有達到是nd無縫鋼管很十分重（chóng）要的進行檢查方法。另外還有就是說進行檢查有沒有包括爐的材料。 老三點就是說要作為工。圓管的圓（yuán）度、方管的方度、要樣兒的采（cǎi）用相應辦法解決、nd無縫鋼（gāng）管雙方的（de）采用相應辦法解決、另外還有很十分重要的（de）一些就是說整隻（zhī）無縫鋼管的（de）水（shuǐ）準儀度。
First of all, we should look at the surface of ND steel pipe. Observe the brightness and surface problems such as welding leakage and peeling. A good ND steel pipe has a bright surface and will not rust in general. The second point is to look at the material. Chemical composition is the basis of ND steel pipe. Checking whether the chemical composition is up to the standard is an important inspection method for ND steel pipes. The other is to check whether the material of the refining furnace is available. The third point is to look at the workmanship. Roundness of circular pipe, squareness of square pipe, surface treatment, treatment of both ends of ND steel pipe, and a very important point is the flatness of the whole steel pipe.
最終，好的nd無（wú）縫鋼管製造廠具備好的進行管理層、好的（de）進行操作工、好的規（guī）章製度、有準譜（pǔ）兒的較為知名度和良好聲（shēng）譽度，出現來的產品任其自然也能符合客戶的有關高端具體要求（qiú）。而一部分小（xiǎo）的或是歪點子規的無縫鋼管製造廠生出（chū）現來nd無縫（féng）鋼管不單進行幫子觀上與好的nd無（wú）縫鋼管有空白點，其顛撲不破具（jù）體程度、柔韌，也有更加很大的空白點。
Finally, a good ND steel pipe manufacturer has good management, good operators, good system, a certain degree of popularity and credibility, and the products produced can naturally meet the high-end requirements of customers. And some small or irregular steel pipe manufacturers produced ND steel pipe not only in appearance and good ND steel pipe has a gap, its hardness, toughness, but also a big gap.
nd無縫（féng）鋼管較好的熱度進行控製涵管冶金學完整過程的較為順當順利（lì）完成，如液化脫磷的確保不單具體要求高，高堿度渣，還有必要具備較好的耐（nài）恒溫協同配合。這是特別指出心竅的早期脫磷。其主要（yào）原因在於這時候熱度低較為有益於關（guān）盤;在液化包括階段，導致積極性炭氧進行熱鬧，具體要求具（jù）備恒溫（不（bú）等1550?）;冶金學工（gōng）程使爐侯采用相應辦法解決和四周圍鑄造正（zhèng）常化為，依（yī）據采（cǎi）用的有所區別的完（wán）整過程中，具體要求（qiú）爐早鋼液具備持續過熱度的一定要的，以補充出鋼完整過程中，與爐（lú）輸氣，采用相應辦法解決的包括和鋼液（yè）外熱度的破（pò）財。
The smooth completion of the metallurgical process of ND steel tube with good temperature control, such as the guarantee of oxidative dephosphorization, requires not only high requirements, high basicity slag, but also good high temperature resistance cooperation. This is to emphasize rational early dephosphorization. Because the low temperature is beneficial to shut down at this time; during the oxidation refining period, the activated carbon oxygen boiling is caused, requiring a high temperature (greater than 1550); metallurgical engineering makes the furnace processing and surrounding casting normal; according to the different process used, it is necessary to require the furnace early molten steel to have superheat, in order to compensate for the loss of refining and molten steel temperature in the process of tapping, conveying with the furnace, processing.
