A252 Alakaʻi Koʻikoʻi i ka Papa 2 Steel Pipe: He kūpono no nā papahana laina laina lua i hoʻoheheʻe ʻia.
E aʻo e pili ana i ka A252 Grade 2 Steel Pipe:
A252 PAPA 2 Paipu kilahe paipu kila kalapona i hoʻolālā ʻia no ka hoʻohana ʻana i ka paipu kaomi a me nā noi hoʻolālā.Hana ʻia ia e like me nā kūlana ASTM (American Society for Testing and Materials), e hōʻoiaʻiʻo ana i nā kūlana kiʻekiʻe a me ka pololei dimensional.Hōʻike ka GRADE 2 i ka hana ʻana o ka paipu kila me ka hoʻohana ʻana i ka wili arc submerged a i ʻole nā ʻano kuʻi wili ʻole.
ʻO ke koʻikoʻi o ka welding arc submerged pālua:
ʻO ka wiliwili ʻana arc submerged ʻelua, i ʻike ʻia ʻo DSAW, he kaʻina hana wiliwili kūikawā i hoʻohana ʻia e hui pū i nā ʻāpana o ka paipu kila A252 GRADE 2.Hāʻawi ʻo DSAW i nā mea maikaʻi ma mua o nā ʻano hana weld ʻē aʻe, e pili ana i ka pono weld maikaʻi, nā wikiwiki wili kiʻekiʻe, ka liʻiliʻi liʻiliʻi, a me ka mana maikaʻi o ka hoʻokomo wela.Hoʻopaʻa ia i kahi paʻa paʻa ma waena o nā paipu, me ka liʻiliʻi o ka leaks, corrosion a me ke kino.
Waiwai Mechanical
| kila kila | ikaika hua liʻiliʻi | Ka ikaika tensile | ʻO ka elongation liʻiliʻi | ikehu hopena liʻiliʻi | ||||
| Mānoanoa i kuhikuhi ʻia | Mānoanoa i kuhikuhi ʻia | Mānoanoa i kuhikuhi ʻia | ma ka wela hoao o | |||||
| ＜16 | ＞16≤40 | <3 | ≥3≤40 | ≤40 | -20 ℃ | 0 ℃ | 20 ℃ | |
| S235JRH | 235 | 225 | 360-510 | 360-510 | 24 | - | - | 27 |
| S275J0H | 275 | 265 | 430-580 | 410-560 | 20 | - | 27 | - |
| S275J2H | 27 | - | - | |||||
| S355J0H | 365 | 345 | 510-680 | 470-630 | 20 | - | 27 | - |
| S355J2H | 27 | - | - | |||||
| S355K2H | 40 | - | - | |||||
No ke aha e hoʻohana ai i ka paipu kila A252 Grade 2 no nā papahana hoʻoheheʻe?
1. KA IKAIKA NUI A ME KA LUA: A252 GRADE 2 paipu kila he kiʻekiʻe ka ikaika tensile, hiki ke pale aku i nā pilikia o waho a me nā pilikia.ʻO kā lākou lōʻihi e hōʻoia i ka lōʻihi o ke ola lawelawe, e hōʻemi ana i ka pono no ka hoʻololi pinepine a hoʻoponopono paha.
2. Kū'ē Kū'ē: Ua hoʻolālāʻia ka paipu kila A252 GRADE 2 e kū'ē i nā kūlana koʻikoʻi ma lalo o ka honua, e like me kaʻikeʻana i ka waiʻawaʻawa, nā kinikona a me ka wai, me kaʻinoʻole a me ka hoʻohaʻahaʻa.Hoʻonui nui kēia hiʻohiʻona i ke ola lawelawe o nā paipu sewer.
3. Ke kumu kūʻai: A252 Grade 2 paipu kila e hāʻawi i kahi hopena kūpono no ka hana ʻana i ka paipu wai.ʻO kā lākou mau koi haʻahaʻa haʻahaʻa a me ka lōʻihi o ke ola e hiki ke mālama i nā kaona a me nā mea ʻaelike papahana i ka mālama nui ʻana i ka manawa.
No ka hoʻohana ʻana i ka paipu kila A252 papa 2 i ka ʻenekinia sewer:
Hoʻohana nui ʻia ka paipu kila A252 GRADE 2 i nā ʻano hana hoʻoheheʻe wai, e like me:
1. Pūnaehana hoʻoheheʻe kūlanakauhale: Hoʻohana nui ʻia nā paipu kila A252 Grade 2 i ke kūkulu ʻana i nā paipu hoʻoheheʻe ʻana o ke kūlanakauhale no ka lawe pono ʻana i ka wai ʻino mai nā wahi noho a me nā wahi kūʻai aku i nā mea kanu lapaʻau.
2. Pūnaehana Hoʻoheheʻe ʻOihana: Pono nā ʻoihana ʻoihana i nā ʻōnaehana hoʻoheheʻe ikaika e mālama i ka hoʻohemo ʻana i ka wai ʻino mai nā ʻāpana hana a me nā mea hana ʻē aʻe.Hāʻawi ka paipu kila A252 GRADE 2 i ka ikaika a me ka lōʻihi e pono ai no kēia ʻano o ka hoʻohana ʻana i ka paipu wai ʻino.
I ka hopena:
Ke hiki mailaina ʻōpalahana, A252 GRADE 2 paipu kila i hui pū ʻia me ka ʻenehana welding DSAW e hāʻawi i ka ikaika like ʻole, ka lōʻihi a me ka hana holoʻokoʻa.ʻO kona kūʻē ʻana i ka corrosion, ʻoi aku ka ikaika o ka tensile a me ka maikaʻi o ke kumukūʻai e kūpono ia no nā ʻano hana hoʻoheheʻe wai.Ma ka hoʻohana ʻana i kēia mau mea holomua a me nā ʻano welding, hiki i nā kūlanakauhale ke hoʻonui nui i ke ola a me ka pono o kā lākou ʻōnaehana sewer, hōʻemi i nā kumukūʻai mālama a hōʻoia i kahi maʻemaʻe, olakino maikaʻi no kēlā me kēia.
