Abstract: Identification of the steel pipe No. is regarded as a common issue to be resolved during the informationization construction process of domestic weld pipe makers. Addressing the fact that it is so difficult for the weld pipe maker to make the choice when facing lots of identification techniques,the principles and advantages and disadvantages of the currently-used steel pipe No. identification techniques are comparatively analyzed,including such identification process types as manual,picture,color,bar code,RFID,and automatic logic,etc. Furthermore,application prospects of these techniques are discussed,which will be beneficial for the weld pipe manufacturer to finally determine the steel pipe No. tracking technique that suits for his own production characteristics.