Me ka hoʻomau mau ʻana o ka ʻaila ʻaila a me nā māla o waho, e ulu ana nā pipeline no ka lawe ʻana i ka nui o ka aila a me ke kinoea.I kēia manawa, hoʻohana ʻia nā paipu submarine hoʻopili i ka 3LPE a me FBE.ʻAʻole ʻoi aku ka mahana o 3LPE ma mua o 70℃, manawa pōkole a hiki i 80℃.No ka lawe ʻana i ka ʻaila ʻaila ma mua o 80℃, hoʻohana i ka 3LPE coating structure ʻaʻole maopopo i nā koi ʻenehana.ʻOiai ka lōʻihi o ka hoʻohana ʻana i ka mahana FBE hiki ke hiki i 115℃, No ka hoʻokō ʻana i nā koi wela o ka hoʻolālā ma luna, akā ʻoi aku ka koʻikoʻi o ka uhi ʻana o ka FBE, intolerance mechanical damage in transport and offshore pipe-laying, anti-corrosion coating pohō ʻoi aku ka koʻikoʻi. papa hookahi FBE.

No ka hoʻoponopono maikaʻi ʻana i nā kūlana o ka lawe ʻana i nā pilikia corrosion pipeline kiʻekiʻe, ua lanakila nā ʻāina ʻē i ka 3LPP coating structure i pipeline, e like me ke Kaiwa o Mexico hohonu wai subsea pipelines a me ka UK North Sea aila a me ke kinoea pipelines, etc., ua hoʻohana ʻia 3LPP. hale, akā hoʻohana ʻia ka uhi 3LPP i ka pipeline subsea ma ka ʻāina ʻaʻohe mea mua.

ʻO ka polypropylene he mau mea mechanical maikaʻi loa, kona hua, tensile, ikaika hoʻopiʻi, paʻakikī, elasticity a me ke kūpaʻa ʻana ma mua o ke kiʻekiʻe kiʻekiʻe a no laila polyethylene (HDPE) kiʻekiʻe, a me ka polypropylene haʻahaʻa haʻahaʻa haʻahaʻa wai, wai 24h ʻO ka wai o ka wai o 0.01% wale nō, haʻahaʻa loa ma mua o HDPE.Kūleʻa ka polypropylene i ka paʻa kemika, ka hoʻoheheʻe uila, a me ka haʻahaʻa haʻahaʻa ma mua o ka polyethylene.Ma ke ʻano o ka pale wela, hoʻohana lōʻihi i ka polyethylene i hoʻololi ʻia ma kahi mahana o -30 ~ 110℃.Hoʻokumu ʻia ʻo 3LPP ma ke kumu o 3LPE kahi uhi i ka hana maikaʻi loa o ka pale anti-corrosion.3LPP 3LPE kumu a me ka hale e like me ka mea i hoʻohana ʻia i ka epoxy fusion bonded epoxy (FBE), e hoʻonui i ka hoʻopili ʻana i ka metala, i waenakonu o kahi papa polypropylene copolymer adhesive (PPA), a me kahi papa waho o polypropylene (PP) paʻa paʻa, kūʻē kiʻekiʻe i ka hiki ke hoʻopōʻino mechanical, a me ke kūpaʻa maikaʻi i ka hana ʻana i ka cathodic stripping.Hoʻololi ʻia ʻo 3LPP e ka hoʻolālā uhi, ka hoʻohana ʻana i ka mahana ma luna o 110℃, ʻO kona kūpaʻa maikaʻi loa i ka corrosion a me ka hana wela kiʻekiʻe e lanakila ai i ka mākeke ākea ākea, ʻaʻole hana ka uhi wela kiʻekiʻe no nā hemahema ʻē aʻe, e hoʻokō ai i kahi kiʻekiʻe kiʻekiʻe a me ka manaʻo i nā noi wai hohonu, ke puka mai nei ka uhi anti-corrosion kiʻekiʻe. ma ka honua.