Delta Oil Field, suppliers of the full range of premium quality:

API 5CT: Seamless (SML), Electric Resistance Welded (ERW)

& Electric Welded (EW)

Casing & Tubing pipe products for Oil & Gas Wells


Available Specification options for API 5CT Manufacture

Threading standards

  1. STC (Short Thread Casing)
  2. LTC (Long Thread Casing)
  3. BTC (Buttress Thread Casing)
  4. NU (Non-Upset Tubing)
  5. EU (External Upset Tubing)
  6. IJ (Integral Joint Tubing)
  7. MLT-2 (Multi-Lobe Torque Ring)

Product Specification levels

PSL-1: Basic requirements

PSL-2: Enhanced testing and quality control

PSL-3: Highest level for extreme environments

Colour coding for finished pipe identification

        Grade        Coupling Colour    Pipe Body Bands

  1. H40            Black                      None
  2. J55            Green                      One green band
  3. K55            Green                     Two green bands
  4. N80            Red                        One red band
  5. L80            Red                        One red + one brown band
  6. L80-CR9    Red                        One red, one brown + two yellow bands
  7. L80-CR13   Red                        One red, one brown + one yellow band
    C90            Purple                    One purple band
  8. C95            Brown                    One brown band
  9. T95            Silver                      One silver white band
  10. Q125          Orange                  One orange band