ASTM A252ʻO ka paipu kila he mea puʻupuʻu puʻupuʻu puʻupuʻu maʻamau e uhi ana i nā ʻano welded a me nā ʻano ʻole no nā puʻu paipu kila kahi e hoʻohana ʻia ai ka pahu kila ma ke ʻano he lālā lawe haʻahaʻa mau a i ʻole he pūpū e hana ai i ka puʻu paʻa.
Papa 3ʻo ia ka papa hana kiʻekiʻe loa ma waena o nā māka ʻekolu o A252, me ka liʻiliʻi loaikaika hua o 310MPa [45,000 psi]a me ka palena ikiikaika tensile o 455MPa [66,000 psi].Ke hoʻohālikelike ʻia me nā papa ʻē aʻe, ʻoi aku ka maikaʻi o ka Papa 3 no nā hale e pili ana i nā haʻahaʻa kaumaha a i ʻole i nā wahi ʻoi aku ka koʻikoʻi, a hoʻohana pinepine ʻia i ke kūkulu ʻana i nā kumu no nā alahaka nui, nā hale kiʻekiʻe, a i ʻole nā pae waho.
Hoʻokaʻawale ʻia ʻo A252 i ʻekolu mau māka no ka hoʻokō ʻana i nā kaiapuni hoʻohana like ʻole.
Papa 1,Papa 2, aPapa 3.
Hoʻonui mālie i nā waiwai mechanical.
Papa 1hoʻohana nui ʻia i nā noi kahi maikaʻi ka maikaʻi o ka lepo a ʻaʻole kiʻekiʻe loa nā koi hoʻouka.ʻO nā kumu hoʻohālike māmā no nā hale noho a hale kūʻai paha, a i ʻole nā alahaka liʻiliʻi i koi ʻole i nā ukana nui.
Papa 2kūpono ia no nā noi me nā kūlana lepo maikaʻi ʻole a i ʻole nā koi ukana kiʻekiʻe.No ka laʻana, nā alahaka haʻahaʻa haʻahaʻa, nā hale kūʻai nui, a i ʻole nā mea hana o nā hale aupuni.Hiki ke hoʻohana ʻia i nā wahi me nā papa wai kiʻekiʻe, e like me nā muliwai a me nā loko, kahi e koi ʻia ai ke kūʻē deformation ikaika.
Papa 3hoʻohana ʻia no nā koi koʻikoʻi i nā kūlana koʻikoʻi, e like me nā alahaka nui, nā kumu hana koʻikoʻi, a i ʻole nā hana hoʻokumu hohonu no nā hale kiʻekiʻe.Eia kekahi, no nā kūlana geological kūikawā, e like me nā lepo palupalu a paʻa ʻole paha, hāʻawi ʻo Grade 3 i ka hiki ke lawe i ka ukana a me ka paʻa.
Hoʻokumu ʻia i ka makahiki 2014,Ke kila BotopʻO ia ka mea hoʻolako paipu kila kalapona ma ka ʻĀkau Kina, i ʻike ʻia no ka hana ʻana i nā paipu kila welded kiʻekiʻe.
Hoʻokō kā mākou huahana āpau i nā kūlana koʻikoʻi ASTM A252, e hōʻoia ana i ka hana maikaʻi loa ma lalo o nā kūlana koʻikoʻi.
Hāʻawi pū mākou i kahi hui piha a me nā flanges e hoʻokō i nā pono o nā ʻano papahana paipu.
Ke koho ʻoe iā Botop Steel, koho ʻoe i ka maikaʻi a me ka hilinaʻi.
Hiki ke hoʻokaʻawale ʻia ʻo ASTM A252 Pipe Pile Pipes i ʻelua kaʻina hana nui:maʻemaʻe a wili ʻia.
Ma ke kaʻina hana hoʻoheheʻe, hiki ke hoʻokaʻawale ʻia i lokoERW, EFW, aSAW.
Hiki ke hoʻokaʻawale ʻia ʻo SAWLSAW(SAWL) aSSAW(HSAW) ma muli o ke kuhikuhi o ka weld.
No ka mea, wili mau ʻia ʻo SAW me ka hoʻohana ʻana i kahi ʻenehana hoʻoheheʻe arc submerged ʻaoʻao ʻelua, ua kapa ʻia lākou heDSAW.
Hāʻawi kēia mau ʻano hana hana like ʻole i ka ASTM A252 tubular pile pipe e hoʻokō i nā ʻano pono ʻenehana.
ʻO kēia ka papa kuhikuhi holoʻokoʻa o ka paipu kila spiral (SSAW):
paipu kila SSAWkūpono no ka hana ʻana i ka paipu kila nui-diameter a hiki ke hana ʻia i nā anawaena a hiki i 3,500mm.ʻAʻole hiki ke hana ʻia i nā lōʻihi lōʻihi loa, kūpono no nā hale nui, akā ʻoi aku ka maikaʻi o ka paipu kila SSAW i hoʻohālikelike ʻia me LSAW a me SMLS paipu kila.
Hiki iā Botop Steel ke hāʻawi i nā pae nui o nā paipu kila:
ʻAʻole ʻoi aku ka nui o ka phosphorus ma mua o 0.050%.
He mea maʻalahi nā koi hoʻohui 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 paipu paipu, ʻo ia ke ʻano o ke ʻano.Ua lawa ia e hiki ai i ka paipu kila ke pale i nā ukana i koi ʻia a me nā kūlana kaiapuni.ʻO kēia kemika maʻalahi e kōkua i ka hoʻonui ʻana i ke kumukūʻai a me ka huahana ʻoiai e hālāwai ana i nā pono kumu o ka palekana a me ka lōʻihi.
AHāʻawi ka Papa 2 i nā waiwai liʻiliʻi i helu ʻia:
Ma kahi o ka mānoanoa o ka paia i kuhikuhi ʻia ma waena o nā mea i hōʻike ʻia ma luna, e hoʻoholo ʻia ka waiwai elongation haʻahaʻa penei:
Papa 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: elongation ma 2 in. [50.8 mm], %;
t: mānoanoa pā i koho ʻia, in. [mm].
No ka nui o ka paipu paipu i helu ole ia ma ka pakuhi paona paipu, e helu ia ke kaumaha o ka loa hookahi penei:
W = 10.69(D - t)t [ W = 0.0246615(D - t)t ]
W = ke kaumaha o kēlā me kēia ʻāpana lōʻihi, lb/ft [kg/m].
D = i kuhikuhi ʻia ke anawaena waho, in. [mm],
t = mānoanoa pā i koho ʻia, in. [mm].
Ke hāʻawi nei kā mākou hui i kahi ākea ākea e like me ka Paint, varnish, galvanized, zinc-rich epoxy, 3LPE, coal tar epoxy, etc. e hoʻokō i nā pono o nā papahana like ʻole a hōʻoia i ka lōʻihi o ka lōʻihi.
Ke kūʻai ʻana i ka A252 Pipe Pile Tubing, pono e hāʻawi ʻia ka ʻike ma lalo nei e hoʻomaʻamaʻa i ka hiki o ka mea hoʻolako ke hoʻokō pono i kāu mau pono kikoʻī a hōʻemi i nā hoʻololi a me nā lohi hiki.
1 Ka nui (wāwae a i ʻole ka helu o nā lōʻihi),
2 Ka inoa o nā mea (puʻu paipu kila),
3 Nā ʻano hana (seamless a welded),
4 Papa (1, 2, a i ʻole 3),
5 Nui (waho ke anawaena a me ka mānoanoa o ka paia nominal),
6 Nā lōʻihi (hoʻokahi maʻamau, pālua pālua, a ʻaʻahu paha),
7 Pau ka hope,
8 ASTM kikoʻī kikoʻī a me ka makahiki o ka hoʻopuka.
