He whānuitia te whakamahinga o ngā hua kowiri tira i roto i ngā ahumahi me ngā tono maha nā te mea he tino pai te mahi me ngā āhuatanga. I tēnei rā, ka matapakihia e tātou ngā paipa kowiri tira kore-tuimotu me ngā paipa kowiri tira ERW, me te rerekētanga i waenga i ngā hua e rua.
He rerekētanga kei waenganui i te paipa rino kore waikura ERW me te paipa kore waikura. Ko te ERW Pipe he whakarāpopototanga mō te Electric Resistance Welding. E whakamahia ana hei kawe i ngā wai pērā i te wahie, te hau, me ētahi atu, ahakoa te pēhanga, ā, he mahi nui tana i roto i ngā paipa huri noa i te ao. I taua wā anō, he paipa rino kore waikura. Ko ngā paipa rino tapawhā me te tapawhā hāngai, kāore he hononga, he kōhao kau, e whakamahia ana mō te kawe i ngā wai nā te mea he tino kaha te piko me te hurihanga, tae atu ki te hanga i ngā wāhanga hanganga me ngā wāhanga miihini. I te nuinga o te wā, ka whakamahia ngā paipa ERW me ngā paipa rino kore waikura mō ngā kaupapa maha.
He mea hanga ngā paipa kowiri tira kore-waikura mai i ngā porowhita, ko ngā paipa kowiri tira ERW ia he mea hanga mai i ngā koiri hurihuri wera. Ahakoa he rerekē rawa ngā rauemi mata e rua, me mārama ko te kounga o te hua whakamutunga – ko ngā paipa e whakawhirinaki katoa ana ki ēnei āhuatanga e rua – te whakahaere kounga i te wā whakaputa me te āhua tuatahi me te kounga o ngā rauemi mata. He mea hanga ngā paipa e rua mai i te kowiri tira o ngā taumata rerekē, engari ko te mea tino noa ko te paipa i hangaia mai i te kowiri tira 304.
Ka whakamahanahia te porowhita porowhita, ka panaia ki runga i te tokotoko kua pokaia kia puta he āhua kōhao. Muri iho, ka whakahaeretia tōna roa me tōna matotoru mā ngā tikanga whakaputa. Mō te hanga paipa ERW, he tino rerekē te tukanga hanga. Ka piko te roera ki te taha tuaka, ā, ka whakarewahia ngā taha e hono ana i tōna roanga katoa mā te whakarewa ātete.
Ka huihui katoatia ngā ngongo maitai kore waikura ki te raina huihuinga, ā, e wātea ana i roto i te OD tae atu ki te 26 inihi. I tētahi atu taha, ahakoa ngā kamupene maitai tino matatau me te hangarau ERW ka taea anake te whakatutuki i te diameter o waho o te 24 inihi.
Nā te mea ka whakaputaia ngā paipa tuitui, kāore he hononga i te taha tuaka, i te taha radial rānei. Ko ngā paipa ERW, i tētahi atu taha, ka hangaia mā te piko i ngā koiri i te taha o tō rātou tuaka pokapū kia honoa ai i te roanga katoa.
Ko te tikanga, ka whakamahia ngā paipa tuimotu mō ngā mahi pēhanga teitei, ko ngā paipa ERW ia ka whakamahia mō ngā mahi i ngā wāhi pēhanga iti me te pēhanga waenga.
Hei tāpiritanga, i runga i ngā āhuatanga haumaru o ngā paipa kore-tūhono, he whānuitia te whakamahinga i roto i te hinu me te hau, te whakamahine hinu me ētahi atu ahumahi matū, ā, me whai kaupapa here kore-tūhono hei whakarite i te haumaru o te tangata me ngā umanga. I taua wā anō, ka taea hoki te whakamahi i ngā paipa ERW kua hangaia pai i raro i te mana whakahaere kounga tino pakari mō ngā ratonga rite atu i ngā ratonga noa pēnei i te kawe wai, te tūāpapa me te taiepa.
E mōhiotia ana ko te āhua o roto o ngā paipa ERW ka whakahaeretia i ngā wā katoa mā roto i ngā tikanga whakahaere kounga pai, nō reira he pai ake i ngā paipa tuitui.
Mō te ASTM A53, ko te momo S he tikanga he hononga kore. Momo F – oumu, engari he whakarewa, momo E – he whakarewa ātete. Koinā katoa. Koinei te huarahi māmā ki te whakatau mēnā he hononga kore, he ERW rānei te paipa.
Tohutohu: He rongonui ake te ASTM A53 Grade B i ētahi atu momo. Ka taea te hanga tahanga i ēnei paipa, kāore he paninga, ka taea rānei te whakapūkara, te whakapūkara wera rānei, ā, ka hangaia mā te whakamahi i tētahi tukanga hanga whakarewa, hanga kore hononga rānei. I roto i te rāngai hinu me te hau, ka whakamahia ngā paipa A53 mō ngā tono hanganga me ngā tono kore-tino nui.
Mena kei te hiahia koe ki ētahi atu kōrero e pā ana ki tēnei kaupapa, tēnā whakapā mai ki a mātou mō te āhua o nāianei, ngā kōrero whakapā a te tīma kaupapa, me ētahi atu.