Asphalt epo, awọn ohun elo aise jakejado, awọn idiyele kekere. Sibẹsibẹ, awọn ipo iṣẹ ti ko dara, nira lati ṣe iṣeduro didara, idoti ayika to ṣe pataki.

Iposii ti edu, rọrun lati ṣiṣẹ, ṣugbọn igba pipẹ ti o bo Layer ti wa ni arowoto nipasẹ ipa ayika, o dara fun iṣẹ aaye, atẹle 10 ℃ ikole ti o nira.

Awọn teepu tutu Anticorrosive, rọrun lati ṣiṣẹ, ṣugbọn itọsi ti o buruju diẹ, resistance omi kekere, kikankikan kekere, ipa ayika nla.

Epoxy powder corrosion, electrostatic spraying, anti-corrosion material with the same kind of tube frit good, lagbara imora, epoxy lulú sugbon omi jẹ talaka (giga omi gbigba, nínàgà 0.83%), to cathodic Idaabobo oniru mu diẹ ninu awọn iṣoro. Awọn ibeere ohun elo aaye, iṣẹ naa nira, nira lati ṣakoso didara.

3PE isunki awọn ohun elo, lilẹ lagbara ipata pipeline, ga darí agbara, omi resistance lagbara, idurosinsin didara, rọrun ikole, elo, ki o si ma ṣe idoti awọn ayika. PE kekere gbigba omi (kere ju 0.01%), pẹlu iposii agbara giga, yo o gbona alemora PE kekere gbigba omi ati irọrun ti o dara, igbẹkẹle ibajẹ ti o ga, ailagbara jẹ: Ti a bawe pẹlu awọn ohun elo atunṣe miiran idiyele idiyele giga.

Awọn ẹya ara ẹrọ ti awọn teepu tutu ati awọn ẹgbẹ isunki 3PE jẹ: fun gbogbo iru ohun elo ti a bo paipu ti ara, lakoko ti ọna miiran jẹ iwulo si kanna tabi sunmọ si ara ohun elo ti a bo paipu.