Black mild steel blind casing as per API 5L/ASTM A53 NPT Thread

Black mild steel blind casing is mostly done as per API 5L /ASTM A53 standards with NPT thread. 

This kind of casings, very different from API 5CT casings in threading, are often used in water well drilling projects. 

The pipe body can be ERW or Seamless . 

Here, we mainly talk about ERW type: 

We, Hebei Borun Electric Resistance Welded Pipe Manufacturing Co.,Ltd are an international manufacturer of Tubular pipe for Oilfield and Energy Production. We offer pipe for Petrochemical industry, chemical industry, power industry, agricultural irrigation and urban construction, and even pipeline transmission. Except for ERW welded pipe, we also work on  Casing pipe, oil tubing, seamless carbon pipe, spiral welded pipe, square tube, and pipe fittings. If you are interested , welcome to have a talk. We wil always be here to give the best service.