Pipa Spiral(ssaw steel pipe): ma ke kāʻili ʻana ma ka mīkini hana ʻōwili, ke kuhikuhi ʻana i ka spiral, a laila hana ʻia ka wili ʻana arc submerged ʻaoʻao ʻelua ma o ka capacitor. Spiral welded kila paipu hana kaʻina hana, prone i leakage i na hihia he nui, e like me ka welding a me ka aoao hewa. Eia naʻe, i kēia mau hihia, ʻike ʻia ʻo Chlamydia ka mea paʻakikī loa i ka hoʻopaʻa ʻana i ka weld wili kila kila.

ʻO ka trachoma i kapa ʻia: ʻo ke kaʻina hana kuʻi ʻana ma ka ʻaoʻao o loko o ka weld a i ʻole welds, ʻaʻole i komo pono ʻia nā ʻāpana a i ʻole nā ​​ʻōpala, a me ke ʻano o ka lua one ma ka ʻili o ka weld. ʻO ke kumu o ka trachoma penei:
1, ʻo ka hāʻawi ʻana o ka lama kuʻi i ka wā o kēia manawa he liʻiliʻi loa, pōkole loa ka capacitor, ʻaʻole i piha pono ka capacitor i ka wā e hoʻopaʻa ʻia ai ka ʻili kuʻi, no laila ke komo ʻia ke one a ʻaʻole nā ​​ʻōpala.
2, hoʻokani scimitar i loko o ke ʻano o ka ʻāʻī o ka wā ʻaʻole maikaʻi ka puʻu, ʻaʻole i kūlike pono ke kāʻei, ua nui loa ka ʻokoʻa ma waena o ka ʻōpala.
3, ke kila wiliwili ʻia inā ʻaʻole i hoʻomaʻemaʻe nā ʻaoʻao ʻelua i ka lihi o ka ʻōpala a i ʻole ka unahi.
4, ʻaʻohe mālama manawa kūpono o nā lako hana e hoʻomaʻemaʻe. ʻO ka lepo a i ʻole ka lepo o ka papa hana, hāʻule hewa i loko o ke āpau i ka wili ʻana o ke kila.
5, haʻahaʻa haʻahaʻa loa ka mahana hana a i ʻole ka pulu ʻana o ka hale hana, e pili ana i ka mahana a me ka maloʻo o nā wahi welding.