He aha ka "Pipeline Steel"?

Hoʻohana kila paipu

Paipu kilaʻO nā ʻano huahana nā paipu kila maʻemaʻe a me nā paipu kila welded, hiki ke hoʻokaʻawale ʻia i ʻekolu mau ʻāpana: alpine, nā wahi kiʻekiʻe-sulfur a me ka waiho ʻana o ke kai. .

ʻO nā pilikia he nui e kū nei i ke kila paipu: ʻo ka hapa nui o nā māla aila a me ke kinoea aia ma nā ʻāpana polar, ka hau hau, nā wao nahele, a me nā wahi moana, a ʻoi aku ka paʻakikī o nā kūlana kūlohelohe;a i ʻole i mea e hoʻomaikaʻi ai i ka maikaʻi o ka lawe ʻana, hoʻonui mau ʻia ke anawaena o ka pipeline, a hoʻonui mau ʻia ke kaomi lawe.

Na Pono Pipeline Steel

Mai ka loiloi piha ʻana i ke ʻano o ka hoʻomohala ʻana o nā pipeline aila a me ka hau, nā kūlana hoʻomoe pipeline, nā ʻano hana hemahema a me nā kumu hemahema, pono e loaʻa i ke kila pipeline nā waiwai mechanical maikaʻi (pā mānoanoa, ikaika kiʻekiʻe, paʻakikī kiʻekiʻe, ʻaʻahu kūpaʻa), a pono pū kekahi. nui anawaena, Pono e loaʻa i ka nui anawaena, weldability, anu a me ka haʻahaʻa wela kū'ē, corrosion kū'ē (CO2), kū'ē i ke kai a me HIC, SSCC hana, etc.

①Ka ikaika kiʻekiʻe

ʻAʻole pono ke kila pipeline i ka ikaika tensile kiʻekiʻe a me ka ikaika e hāʻawi ai, akā pono nō hoʻi i ka lākiō hua i ka laulā o 0.85 ~ 0.93.

② Paʻakikī hopena kiʻekiʻe

hiki i ka paʻakikī hopena kiʻekiʻe ke hoʻokō i nā koi o ka pale ʻana i ka haki.

③Ka wela hoʻololi ductile-brittle haʻahaʻa

Pono nā ʻāina koʻikoʻi a me nā kūlana aniau i ke kila pipeline e loaʻa i kahi mahana hoʻololi ductile-brittle haʻahaʻa haʻahaʻa. ʻo ≥85% ka ʻāpana ʻāpana haʻihaʻi o ka specimen ma ka wela haʻahaʻa haʻahaʻa.

④Ke kūʻē maikaʻi loa i ka hāhā ʻana i ka hydrogen-induced (HIC) a me ka sulfide stress corrosion cracking (SSCC)

⑤ ʻO ka hana kuʻi ʻana maikaʻi

He mea koʻikoʻi ka weldability maikaʻi o ke kila e hōʻoia i ka pono a me ka maikaʻi wili o ka pipeline.