1: ʻO nā hiʻohiʻona o nā paipu kila hili pololei he kaʻina hana maʻalahi, kiʻekiʻe ka hana pono, haʻahaʻa kumu kūʻai, hoʻomohala wikiwiki, a me ka paʻa maikaʻi. Hiki ke hoʻohālikelike ʻia ka maikaʻi o nā hua paipu kila welded me nā paipu kila ʻole, maʻalahi ke ʻano hana, a maʻalahi ke hoʻololi i nā kikoʻī a me ka hana ʻana. ʻOi aku ka haʻahaʻa o ke kumukūʻai ma mua o nā paipu kila ʻole, no laila ke hoʻonui nei ka hoʻohana ʻana i kēlā me kēia makahiki a ʻoi aku ka nui o kāna noi.

2: ʻO nā hiʻohiʻona o ka epoxy resin: ʻO ke kiʻi pena ma hope o ka hoʻōla ʻia ʻana e ka epoxy resin he paʻakikī a paʻa i ka wai, ʻaʻohe mea ʻawaʻawa, ʻaʻole hoʻohaumia i ka wai. Paʻa ikaika, pili maikaʻi ma waena o nā kiʻi pena. Loaʻa iā ia nā waiwai anti-rust a me ka wai-kūpaʻa maikaʻi a hoʻohana i nā mea anti-rust maikaʻi loa e hōʻoia i kāna hana anti-rust. Loaʻa iā ia ka ikaika mechanical maikaʻi, ke kiʻi pena paʻakikī, ka pale ʻana i ka ʻaʻahu, a me ke kūpaʻa hopena. He kiʻekiʻe ka ʻike paʻa a mānoanoa ke kiʻi uhi. Ho'ōla ma ka lumi wela e hana i kahi kiʻiʻoniʻoni. ʻAʻole pono i nā mea hoʻomaloʻo nui. ʻAʻohe mea ʻawaʻawa nā uhi epoxy, e hōʻoia ana i ka palekana o ka wai.