ʻEkolu mau ala nui e ʻike ai i nā paipu welded a me nā paipu seamless (smls):

1. Keʻano metallographic

ʻO ke ala metallographic kekahi o nā ala nui e hoʻokaʻawale i nā paipu welded a me nā paipu seamless. ʻAʻole i hoʻohui ʻia ke kiʻekiʻe alapine kiʻekiʻe welded paipu (ERW) i nā mea hoʻoheheʻe, no laila ua haiki loa ke kuʻi weld i loko o ka paipu kila welded, a ʻaʻole hiki ke ʻike maopopo ʻia ke kaʻina weld inā hoʻohana ʻia ke ʻano o ka wili a me ka corrosion. I ka manawa e wili ʻia ai ke kiʻekiʻe-frequency resistance welded steel pipe me ka ʻole o ka mālama ʻana i ka wela, e ʻokoʻa loa ke ʻano o ka weld seam mai ka mea makua o ka paipu kila. I kēia manawa, hiki ke hoʻohana ʻia ke ʻano metallographic e hoʻokaʻawale i ka paipu kila welded mai ka paipu kila seamless. I ke kaʻina hana o ka ʻike ʻana i nā paipu kila ʻelua, pono ia e ʻoki i kahi liʻiliʻi liʻiliʻi me ka lōʻihi a me ka laula o 40 mm ma ka welding point, e hana i ka wili wili, ka wili maikaʻi a me ka polishing ma luna, a laila e nānā i ke ʻano ma lalo o kahi metallographic. microscope. Hiki ke ʻike pono ʻia nā paipu kila welded a me nā paipu kila ʻole i ka wā e ʻike ʻia ai nā microstructures ferrite a me widmansite, base metal a me weld zone microstructures.

2. ʻO keʻano o ka corrosion

I ke kaʻina o ka hoʻohana ʻana i ke ʻano corrosion e ʻike ai i nā paipu welded a me nā paipu seamless, pono e poni ʻia ka wili wili o ka paipu kila welded i hana ʻia. Ma hope o ka pau ʻana o ka wili ʻana, pono e ʻike ʻia nā ʻāpana o ka wili ʻana, a laila e poni ʻia ka ʻaoʻao hope o ka seam welded me ke one. A e hoʻohana i ka 5% nitric acid alcohol solution e mālama i ka maka hope. Inā loaʻa kahi weld maopopo, hiki iā ia ke hōʻoia i ka paipu kila he paipu kila i hoʻopaʻa ʻia. Eia naʻe, ʻaʻohe ʻokoʻa ʻokoʻa o ka maka hope o ka paipu kila ma hope o ka ʻino ʻana.

Nā ʻano o ka paipu welded
Loaʻa i ka paipu kila Welded nā waiwai ma muli o ke kuʻi pinepine ʻana, ka ʻōwili anuanu a me nā kaʻina hana ʻē aʻe.
ʻO ka mea mua, maikaʻi ka hana mālama wela. ʻO ka lilo o ka wela o nā paipu kila welded he mea liʻiliʻi, he 25% wale nō, ʻaʻole kūpono wale i ka lawe ʻana, akā e hoʻemi ana hoʻi i nā kumukūʻai.
ʻO ka lua, he pale wai a me ka corrosion. I ke kaʻina hana ʻenekinia, ʻaʻole pono e hoʻonohonoho kaʻawale i nā auwaha paipu.
Hiki ke kanu pololei ʻia i ka lepo a i ʻole ma lalo o ka wai, e hōʻemi ai i ka paʻakikī o ke kūkulu ʻana i ka papahana.
ʻO ke kolu, loaʻa iā ia ka hopena hopena. ʻOiai ma kahi haʻahaʻa haʻahaʻa haʻahaʻa, ʻaʻole e hōʻino ʻia ka paipu kila, no laila aia kekahi mau pono o kāna hana.

Nā waiwai o ka paipu ʻole
Ma muli o ka ikaika tensile kiʻekiʻe o ka mea metala o ka paipu kila maʻemaʻe, ʻoi aku ka ikaika o kona hiki ke pale aku i ka pōʻino, a loaʻa iā ia kahi awāwa, no laila hiki iā ia ke lawe pono i ka wai. Steel paipu, a me kona rigidity mea nui. No laila, ʻoi aku ka nui o ka hoʻouka ʻana o ka paipu kila maʻemaʻe, hiki ke hoʻohana nui ʻia i nā papahana me nā koi kūkulu kiʻekiʻe.

3. E hoʻokaʻawale e like me ke kaʻina hana

I ke kaʻina hana o ka ʻike ʻana i nā paipu welded a me nā paipu seamless e like me ke kaʻina hana, hoʻopaʻa ʻia nā paipu kila welded e like me ka ʻōwili anuanu, extrusion a me nā kaʻina hana ʻē aʻe. Ke wili ia ka paipu kila, e hana ia i paipu wiliwili spiral a me ka paipu wili wili pololei, a e hana ia i paipu kila poepoe, paipu kila huinahalike, paipu kila oval, paipu kila triangular, paipu kila hexagonal, a. ?

I ka pōkole, e hana nā kaʻina hana like ʻole i nā paipu kila o nā ʻano like ʻole, i hiki ke ʻike maopopo ʻia nā paipu kila welded a me nā paipu kila ʻole. Eia nō naʻe, i ke kaʻina o ka ʻike ʻana i nā paipu kila ʻole e like me ke kaʻina hana, ua hoʻokumu nui ʻia ia ma ke ʻano o ka ʻōwili wela a me ke ʻano o ka ʻōwili anu. ʻElua mau ʻano paipu kila maʻemaʻe, i hoʻokaʻawale ʻia i loko o nā paipu kila wela a me nā paipu kila liʻiliʻi. Hoʻokumu ʻia nā paipu kila maʻemaʻe ʻole ma o ke kī ʻana, ka ʻōwili ʻana a me nā kaʻina hana ʻē aʻe, ʻoi aku ka nui o ka nui a me ka mānoanoa o nā paipu kila seamless ma kēia kaʻina hana; Hoʻokumu ʻia nā paipu huki anu e nā blanks pahu huki anu, a ʻoi aku ka ikaika o ka mea, akā maʻalahi kona ʻaoʻao waho a me loko.

4. Hoʻokaʻawale ma ka hoʻohana ʻana

ʻO nā paipu kila welded he kiʻekiʻe ke kulou a me ka ikaika torsional a ʻoi aku ka nui o ka lawe ʻana, no laila hoʻohana nui ʻia lākou i ka hana ʻana i nā ʻāpana mechanical. No ka laʻana, ʻo nā paipu wili aila, nā ʻaukā kaʻa, nā papa paikikala, a me nā scaffolding kila i hoʻohana ʻia i ke kūkulu hale ʻana i hana ʻia me nā paipu kila welded. Eia nō naʻe, hiki ke hoʻohana ʻia nā paipu kila maʻemaʻe e like me nā paipu no ka lawe ʻana i nā wai no ka mea he mau ʻāpana hakahaka a me nā ʻāpana kila lōʻihi me ka ʻole o nā humu a puni. No ka laʻana, hiki ke hoʻohana ʻia e like me ka pipeline no ka lawe ʻana i ka aila, ke kinoea maoli, ke kinoea, ka wai, a me nā mea ʻē aʻe. ʻO nā paila kaomi waena, nā paipu wai paila a me nā paipu mahu wela loa no nā paila locomotive. I ka pōkole, ma o ka hoʻokaʻawale ʻana o nā hoʻohana, hiki iā mākou ke hoʻokaʻawale i nā paipu kila welded a me nā paipu kila ʻole.