2PE/3PE Coated steel pipe Executive Standard: GB-T23257-2009 Buried steel pipe with 2PE/3PE coating are used for the transmission of water, oil, gas and other media, the working temperature is 50â??-70â??ï¼? it has good performance of anti-corrosive, low water- absorption rate, high mechanical strength. External PE coated steel pipe Executive Standard: DIN30670-1991 Buried steel pipe with 3PE coating are used for the transmission of water, oil, gas and other media, the working temperature is 50â??-70â??ï¼? it has good performance of anti-corrosive, low water- absorption rate, high mechanical strength. External dual-layer fusion bonded Epoxy powder coating Executive Standard:Q/CNPC38-2002 Steel pipes with external dual- fusion boned epoxy powder coating are used for the transmission of water, oil, gas and other media, the working temperature is -30â??-100â??ï¼?this coating is easy to paint and no pollution. It has good performance of anti-impact, bending and high temperate-resistance. It is widely used in domestic and international.. Fusion bonded epoxy powder coating Executive Standard:SY/T0442-2010 Steel pipes with internal fusion bonded epoxy powder coating are used in transmission of water, natural gas and other media, the working temperature is -30â??-100â??ï¼?it can decrease thr re-pollution during transmission, and prolong the lifetime of steel pipeline. Coal tar epoxy coated steel pipe Executive Standard:SY/T0447-96 Steel pipe with coal tar epoxy coating are used in transmission of water, oil, natural gas and other media, the temperature of transmitted media can not exceed 110â??, it has function of anti-corrosive.