ʻO ka paipu hoʻoheheʻe ʻole ʻia (GB/T8162-2008) he ʻano paipu kila ʻole i hoʻohana ʻia no ka hana maʻamau a me ka hana mechanical. ʻO ka maʻamau o ka paipu kila maʻemaʻe wai e pili ana i nā paipu kila maʻemaʻe e lawe ana i nā wai.

Ma waho aʻe o nā mea kalapona (C) a me kahi nui o ke silikoni (Si) (maʻamau ʻaʻole i ʻoi aku ma mua o 0.40%) a me ka manganese (Mn) (maʻamau ʻaʻole i ʻoi aku ma mua o 0.80%, ʻoi aku ka kiʻekiʻe a hiki i ka 1.20%) mau mea ala no ka deoxidation, structural. nā paipu kila , me ka ʻole o nā mea hoʻohuihui ʻē aʻe (koe wale nā ​​mea koena).

ʻO ia mau paipu kila kila e hōʻoiaʻiʻo i ka haku mele a me nā waiwai mechanical. ʻO ka maʻiʻo o ka sulfur (S) a me ka phosphorus (P) nā mea haumia i hoʻomalu ʻia ma lalo o 0.035%. Inā hoʻomaluʻia ma lalo o 0.030%, ua kapaʻiaʻo ia ke kila kila kiʻekiʻe, a pono e hoʻohuiʻia ka "A" ma hope o kona papa, e like me 20A; ina P i hoomaluia ma lalo o 0.025% a me S ma lalo o 0.020%, ka mea, ua kapaia super high-quality structural paipu kila, a me kona papa e hahai ia e Add "E" e hoʻokaʻawale. No nā mea hoʻohui ʻē aʻe i lawe ʻia i loko o nā paipu kila mai nā mea maka, ʻo ka ʻike o ka chromium (Cr), nickel (Ni), keleawe (Cu), etc. 0.25%. Hiki i ka 1.40% kekahi mau māka o ka manganese (Mn), i kapa ʻia he kila manganese.

ʻO ka ʻokoʻa ma waena o ka pipe seamless structural seamless pipe a me ka wai seamless pipe:

ʻO ka ʻokoʻa nui ma waena o ia a me ka paipu kila maʻemaʻe ʻole i hoʻopaʻa ʻia ʻo ia ka hoʻāʻo hydraulic hoʻokahi a i ʻole ultrasonic, eddy current a me magnetic flux leakage inspection. No laila, i ke koho maʻamau o nā paipu kila pipeline, ʻaʻole pono e hoʻohana ʻia nā paipu kila seamless wai. ʻO ke ʻano hōʻike o ka paipu kila maʻemaʻe ʻo ia ke anawaena o waho, ka mānoanoa o ka paia, a ʻo ka paipu kila maʻemaʻe ʻole i hoʻohana ʻia no ka mīkini, ka mine lanahu, ke kila hydraulic, a me nā kumu ʻē aʻe. Hoʻokaʻawale ʻia nā mea o ka paipu kila maʻemaʻe ʻole i ka paia i 10 #, 20 #, 35 #, 45 #, 16Mn, 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo a pēlā aku.

Structural kuhiliʻole kila seamless paipu (GB/T14975-1994) mea he wela-rolled (extruded, hoʻonui) a me ke anu (rolled) seamless kila paipu.

Ma muli o kā lākou mau kaʻina hana hana like ʻole, ua māhele ʻia nā paipu kila maʻemaʻe i loko o nā paipu kila maʻemaʻe (extruded) a me nā paipu kila liʻiliʻi. Hoʻokaʻawale ʻia nā paipu anu i huki ʻia (rolled) i ʻelua ʻano: nā paipu poepoe a me nā paipu ʻano kūikawā.

Hōʻike holo kaʻina hana:
ʻO ka ʻōwili wela (paipu kila maʻemaʻe ʻole i hoʻokuʻu ʻia): puʻupuʻu puʻupuʻu pōʻai → hoʻomehana → perforation → ʻekolu-roller skew rolling, ʻōwili mau a extrusion → wehe ʻana i ka paipu → hoʻonui ʻia (a i ʻole ka hoʻemi ʻana o ke anawaena) → hoʻoluʻu → paipu billet → hoʻopololei → hoʻāʻo wai (a i ʻole ʻike hemahema) → māka → waiho.

ʻO ka paipu kila ʻaʻole i huki ʻia (ʻōwili) ʻia: puʻupuʻu pōʻai billet → hoʻomehana → perforation → poʻomanaʻo → annealing → pickling → ʻaila ʻaila (pale keleawe) → kaha kiʻi anuanu (cold rolling) → billet → mālama wela → straightening → Hydraulic test (flaw ʻike) → hōʻailona → waihona.