Ụkpụrụ:
GB / T28897-2012: Steel Pipe nke mgbagwoju plastik.
CJ / T120-2008: mkpuchi plastik ígwè ọkpọkọ maka mmiri mmiri.
Oke:
Plastic-lined ọkpọkọ eji mmiri mmiri dị ka mmiri ọṅụṅụ, mmanụ ụgbọala gas, ọkụ nchebe, chemical ngwaahịa, na kpo oku oru ngo wdg mkpuchi plastic ọkpọkọ eji maka ọkụ sprinkler, HAV, gas, mmanụ, chemical anticorrosion, n'okpuruala anticorrosion, cable anticorrosion, desulfurization anticorrosion, UV nchedo anticorrosion, an-ti-static na mgbochi ire ọkụ anticorrosion na mmiri mmiri nnyefe wdg.