Ma hope o nā kūkākūkā loea kikoʻī a me ka loiloi ʻana i nā koi o ka wahi, ua hāʻawi ʻo CHINA ROYAL STEEL i kahi hopena i hoʻopilikino ʻia i nā paipu kila API 5L Grade B me ka uhi pauka FBE (Fusion Bonded Epoxy) kūikawā i hoʻokō piha i nā koi koʻikoʻi o ka mālama ʻana i lalo o ka moana. ʻO nā pono nui o ka huahana:
Mea Maka Hana Kiʻekiʻe– Papa API 5L B: Ma muli o ke kūlana paipu laina API 5L a ʻoi aku paha, me ke kāʻei ikaika o 415 MPa a me 240 MPa no ka tensile a me ka yield, kēlā me kēia. Loaʻa i kēia mau paipu ka hiki ke hāpai i ke kaomi kiʻekiʻe, hiki ke halihali i nā ukana waho kiʻekiʻe i ka hoʻokomo ʻana ma lalo o ka moana a me ka hana lōʻihi.
Palekana maikaʻi loa i ka palaho– Uhi Pauka FBE: Ua uhi ʻia ka ʻili o ka paipu me kahi uhi FBE 500μm, nona nā waiwai maikaʻi loa e kūʻē i ka wai kai, ka paʻakai paʻakai a me ka haumia o ke kai. ʻO ka uhi, ka mea e pipili pono ai, he kūpaʻa i ka hopena a kūpaʻa i ka ʻaʻahu, hoʻokaʻawale i ke kila mai nā wahi hohonu loa o ka moana a hoʻolōʻihi i ke ola o ka paipu ma mua o 20 mau makahiki.
Ka ʻIke Kūikawā– ʻUhi ʻŌmaʻomaʻo: Ua hana ʻia ka uhi ʻana o FBE i ʻōmaʻomaʻo kūikawā no ke kōkua ʻana i ka mea kūʻai aku e ʻike ma kahi a mālama i ka palekana, e hoʻonui i ka wikiwiki o ka ʻimi ʻana a hoʻokomo i ka hana ma lalo o ke kai.