Integral Heavy weight drill pipe is made from AISI 4145H Alloy steel. acc. to API Spec .7 and SY/T5144. It is formed by hot forged and fully heat-treated .There is wear resistance hard banding on tool joints connections and central upset .The Types of hard banding include Arnco 100XT and 300XT. All threads are phosphated, copperized or cold worked. All Connection are equipped with pressed steel thread protectors. All threads are machined with CNC Lathes-Doule-shouldered and special threads.