ASTM A252ʻO ka paipu kila kahi mea paila paipu cylindrical maʻamau e uhi ana i nā ʻano welded a me nā ʻano seamless no nā paila paipu kila kahi e hoʻohana ʻia ai kahi cylinder kila ma ke ʻano he lālā lawe ukana mau a i ʻole he pūpū e hana i kahi paila sima i hoʻolei ʻia ma kahi.
Papa 3ʻo ia ka pae hana kiʻekiʻe loa ma waena o nā pae ʻekolu o A252, me ka liʻiliʻi loaka ikaika hua o 310MPa [45,000 psi]a me ka palena ikika ikaika tensile o 455MPa [66,000 psi]. Ke hoʻohālikelike ʻia me nā papa ʻē aʻe, ʻoi aku ka kūpono o ka Papa 3 no nā hale i kau ʻia i nā ukana kaumaha a i ʻole ma nā wahi ʻoi aku ka koi, a hoʻohana pinepine ʻia i ke kūkulu ʻana i nā kahua no nā alahaka nui, nā hale kiʻekiʻe, a i ʻole nā kahua ma waho.
Ua māhele ʻia ʻo A252 i ʻekolu mau papa e hoʻoponopono ai i nā ʻano hoʻohana like ʻole.
Papa 1,Papa 2, a mePapa 3.
Ka piʻi mālie ʻana o nā waiwai mechanical.
Papa 1hoʻohana nui ʻia i nā noi kahi maikaʻi ke ʻano o ka lepo a ʻaʻole kiʻekiʻe loa nā koi halihali. ʻO nā laʻana e komo pū me nā kumu kūkulu māmā no nā hale noho a ʻoihana paha, a i ʻole nā alahaka liʻiliʻi ʻaʻole pono nā ukana koʻikoʻi.
Papa 2kūpono no nā noi me nā kūlana lepo maikaʻi ʻole a i ʻole nā koi lawe ukana kiʻekiʻe. No ka laʻana, nā alahaka i hoʻouka kūpono ʻia, nā hale kalepa nui, a i ʻole ke kahua o nā hale lehulehu. Hiki ke hoʻohana ʻia ma nā wahi me nā papa wai kiʻekiʻe, e like me nā muliwai a me nā loko, kahi e pono ai ke kūpaʻa ikaika i ka deformation.
Papa 3hoʻohana ʻia no nā koi hana kaumaha i nā kūlana koʻikoʻi, e like me nā alahaka nui, nā kahua lako kaumaha, a i ʻole ka hana kahua hohonu no nā hale kiʻekiʻe. Eia kekahi, no nā kūlana geological kūikawā, e like me ka lepo palupalu loa a paʻa ʻole paha, hāʻawi ka Papa 3 i ka hiki ke lawe ukana kiʻekiʻe loa a me ke kūpaʻa.
Ua hoʻokumu ʻia i ka makahiki 2014,Botop Steelhe mea hoʻolako paipu kila kalapona alakaʻi ma Kina ʻĀkau, i ʻike ʻia no ka hana ʻana i nā paipu kila welded a seamless kiʻekiʻe.
Ua kū kā mākou huahana a pau i nā kūlana ASTM A252 paʻa, e hōʻoiaʻiʻo ana i ka hana kūpono ma lalo o nā kūlana koʻikoʻi.
Hāʻawi pū mākou i kahi laulā piha o nā lako a me nā flanges e hoʻokō i nā pono o nā ʻano papahana piping like ʻole.
Ke koho ʻoe iā Botop Steel, koho ʻoe i ka maikaʻi a me ka hilinaʻi.
Hiki ke hoʻokaʻawale ʻia nā paipu paila ASTM A252 i ʻelua mau kaʻina hana hana nui:wili ʻole a hoʻopaʻa ʻia.
I ke kaʻina hana kuʻihao, hiki ke hoʻokaʻawale hou ʻia i lokoERW, EFW, a meʻIKE.
Hiki ke hoʻokaʻawale ʻia ʻo SAW i loko oLSAW(SAWL) a meSSAW(HSAW) ma muli o ke kuhikuhi o ka wili ʻana.
Ma muli o ka hoʻopili pinepine ʻia ʻana o SAW me ka hoʻohana ʻana i kahi ʻenehana kuʻi arc submerged pālua ʻaoʻao, ua kapa pinepine ʻia lākou heDSAW.
ʻAe kēia mau ʻano hana like ʻole i ka paipu paila tubular ASTM A252 e hoʻokō i nā pono ʻenekinia like ʻole.
Eia ka pakuhi kahe hana o ka paipu kila wili (SSAW):
Paipu kila SSAWhe kūpono ia no ka hana ʻana i ka paipu kila nui a hiki ke hana ʻia i nā anawaena a hiki i ka 3,500mm. ʻAʻole hiki ke hana ʻia i nā lōʻihi loa, kūpono no nā hale nui, akā ʻoi aku ka liʻiliʻi o ke kumukūʻai o ka paipu kila SSAW i hoʻohālikelike ʻia me ka paipu kila LSAW a me SMLS.
Hiki iā Botop Steel ke hāʻawi i nā ʻano nui o nā paipu kila:
ʻAʻole ʻoi aku ka nui o ka phosphorus ma mua o 0.050%.
He maʻalahi nā koi hoʻohuihui kemika no ASTM A252 i hoʻohālikelike ʻia me nā kūlana paipu ʻē aʻe no nā noi ʻē aʻe no ka mea ke hoʻohana ʻia ka paipu ma ke ʻano he puʻu paipu, he ʻano kūkulu nui ia. Ua lawa ia e hiki i ka paipu kila ke kū i nā ukana e pono ai a me nā kūlana o ke kaiapuni. Kōkua kēia kemika i hoʻomaʻalahi ʻia e hoʻonui i ke kumukūʻai a me ka huahana me ka hoʻokō ʻana i nā pono kumu o ka palekana kūkulu a me ka lōʻihi.
AHāʻawi ka Papa 2 i nā waiwai liʻiliʻi i helu ʻia:
Inā he waena ka mānoanoa o ka paia i kuhikuhi ʻia i nā mea i hōʻike ʻia ma luna, e hoʻoholo ʻia ka waiwai elongation haʻahaʻa loa penei:
Papa 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: elongation ma 2 ʻīniha [50.8 mm], %;
t: ka mānoanoa o ka paia i kuhikuhi ʻia, ʻīniha [mm].
No nā nui o nā paila paipu i helu ʻole ʻia ma ka pakuhi kaumaha paipu, e helu ʻia ke kaumaha no kēlā me kēia anakahi lōʻihi penei:
W = 10.69(D - t)t [ W = 0.0246615(D - t)t ]
W = ke kaumaha no kēlā me kēia anakahi lōʻihi, lb/ft [kg/m].
D = ke anawaena waho i kuhikuhi ʻia, ʻīniha [mm],
t = ka mānoanoa o ka paia i kuhikuhi ʻia, ʻīniha [mm].
Hāʻawi kā mākou hui i kahi ākea o nā uhi ʻana e like me ka pena, ka varnish, galvanized, zinc-rich epoxy, 3LPE, coal tar epoxy, a me nā mea ʻē aʻe e hoʻokō i nā pono o nā papahana like ʻole a hōʻoia i ka lōʻihi o ka lōʻihi.
I ke kūʻai ʻana i ka A252 Pipe Pile Tubing, pono e hāʻawi ʻia ka ʻike ma lalo nei e kōkua i ka hiki i ka mea hoʻolako ke hoʻokō pololei i kāu mau pono kikoʻī a hōʻemi i nā hoʻololi ma hope a me nā lohi hiki.
1 Ka nui (kapuaʻi a i ʻole ka helu o nā lōʻihi),
2 Inoa o ka mea (nā paila paipu kila),
3 mau ʻano hana (seamless a welded paha),
Papa 4 (1, 2, a i ʻole 3),
5 Ka nui (ke anawaena o waho a me ka mānoanoa o ka paia maʻamau),
6 Nā lōʻihi (hoʻokahi kaulele, pālua kaulele, a ʻano like paha),
7 Hoʻopau hope,
8 Ka hoʻākāka kikoʻī ASTM a me ka makahiki o ka hoʻopuka ʻana.
