Mapaipi achitsulo ozungulira amagwiritsidwa ntchito makamaka ngati mapaipi amadzimadzi komanso mapaipi owunjikira. Ngati chitoliro chachitsulo chikagwiritsidwa ntchito potulutsa madzi, nthawi zambiri chimapangidwa ndi anti-corrosion mankhwala mkati kapena kunja. Thandizo lodziwika bwino la anti-corrosion limaphatikizapo 3pe anti-corrosion, epoxy malasha tar anti-corrosion, ndi epoxy powder anti-corrosion. Dikirani, chifukwa njira yothira ufa wa epoxy imavutitsidwa ndi zovuta zomata, njira yothira ufa wa epoxy sinayambe yalimbikitsidwa. Tsopano, ndi chitukuko chopambana cha njira yapadera ya phosphating ya epoxy powder dipping, vuto la adhesion la epoxy powder dipping process lagonjetsedwa kwa nthawi yoyamba, ndipo njira yomwe ikutulukira ya epoxy powder dipping yayamba kuonekera.

Kuwunika zomwe zimapangitsa kuti makulidwe a anti-corrosion akuchulukidwe pamapaipi achitsulo ozungulira, makulidwe osagwirizana a zokutira zachitsulo zozungulira za 3PE zimawonekera makamaka pakuchulukira kwa mfundo zoyeserera mbali zonse zomwe zimagawidwa mozungulira. The makampani muyezo SY/T0413-2002 alibe malamulo makulidwe ofanana. Zimatanthawuza kuchuluka kwa makulidwe a zokutira koma zimafuna kuti mtengo wamtengo wapatali wa zokutira sungakhale wotsika kuposa mtengo wamtengo wapatali wa mfundo, m'malo mwa mtengo wamtengo wapatali wa mfundo zambiri zoyesera.

Ngati makulidwe a ❖ kuyanika ndi osagwirizana panthawi yopaka mipope yazitsulo zozungulira, zinthu zokutira zidzawonongeka. Izi zili choncho chifukwa makulidwe a zokutira pa gawo la thinnest likafika pa tsatanetsatane, makulidwe a gawo lokhuthala adzakhala aakulu kuposa makulidwe a Coating specification. Kuphatikiza apo, zokutira zosagwirizana zimatha kupangitsa kuti makulidwe a zokutira pagawo la thinnest la chitoliro chachitsulo kulephera kukwaniritsa zofunikira. Zifukwa zazikulu za makulidwe osagwirizana panthawi yopanga ndi kugawa zinthu ndi kupindika kwa chitoliro chachitsulo. Njira yothandiza yothanirana ndi ❖ kuyanika kosiyana kwa mapaipi odana ndi dzimbiri a 3PE ndikusintha ma extrusion angapo amafa kuti makulidwe a anti-corrosion m'malo angapo akhale yunifolomu momwe mungathere ndikuletsa mipope yachitsulo yosayenerera kuti isaphimbidwe pa intaneti.

Makwinya pamwamba pa zokutira: Kutulutsa ndi kupindika kwa zinthu za polyethylene patope yachitsulo kumafuna kugwiritsa ntchito chodzigudubuza cha silicone. Kusintha kosayenera panthawiyi kungayambitse makwinya pamwamba pa zokutira. Kuonjezera apo, kuphulika kwa filimu yosungunuka pamene zinthu za polyethylene zimasiya kutuluka kufa panthawi ya extrusion zidzatulutsanso zolakwika zamtundu wofanana ndi makwinya. Njira zowongolera zomwe zimayambitsa makwinya zimaphatikizapo kusintha kuuma ndi kupanikizika kwa mphira wodzigudubuza ndi wodzigudubuza. Kuchokera pamalingaliro awa, moyenerera onjezani kuchuluka kwa polyethylene kuti muchepetse kuphulika kwa filimu.