I-Petroleum asphalt, izinto zokusetshenziswa ezibanzi, amanani aphansi. Nokho, izimo zokusebenza ezimbi, okunzima ukuqinisekisa izinga, ukungcola okungathi sína kwemvelo.

I-coal tar epoxy, kulula ukuyisebenzisa, kodwa ungqimba olumboza isikhathi eside luphulukiswa umthelela wemvelo, lulungele umsebenzi wasensimini, okulandelayo 10 ℃ ukwakhiwa okunzima.

Amateyipu abandayo e-Anticorrosive, kulula ukusebenza, kodwa ukunamathela kubi kakhulu, ukumelana namanzi aphansi, amandla aphansi, umthelela omkhulu wemvelo.

I-Epoxy powder corrosion, i-electrostatic spraying, i-anti-corrosion material enohlobo olufanayo lwe-tube frit enhle, ukubopha okuqinile, i-epoxy powder kodwa amanzi ampofu (ukumuncwa kwamanzi amaningi, afinyelela ku-0.83%), ekwakhiweni kokuvikela kwe-cathodic kuletha ubunzima obuthile. Izidingo zikagesi zesayithi, ukusebenza kunzima, kunzima ukulawula ikhwalithi.

Izinto ezinciphayo ze-3PE, ukuvala ukugqwala kwepayipi eliqinile, amandla aphezulu emishini, ukumelana namanzi kuqinile, ikhwalithi ezinzile, ukwakhiwa okulula, ukusebenziseka, futhi akungcolisi imvelo. Ukumuncwa kwamanzi aphansi kwe-PE (ngaphansi kuka-0.01%), kanye ne-epoxy yamandla aphezulu, ingcina enamathelayo encibilikayo eshisayo ye-PE ukumuncwa kwamanzi aphansi kanye nokuguquguquka okuhle, ukwethembeka okuphezulu kokugqwala, ububi buwukuthi: Uma kuqhathaniswa nezinye izindleko zempahla yokulungisa izindleko eziphezulu.

Izici zamatheyipu abandayo kanye namabhande ashwaphayo e-3PE yilezi: kuzo zonke izinhlobo zezinto zokumboza zamapayipi zomzimba, kanti enye indlela isetshenziswa okufanayo noma eduze nomzimba wempahla yokumboza ipayipi.