E rua ngā huinga takirere kua whakaritea e NSEN, tae atu ki ngā takirere 150LB me 600LB, ā, kua paahitia e rāua te whakamātautau ahi.

Nō reira, ka taea e te tiwhikete API607 e whiwhihia ana i tēnei wā te kapi katoa i te raina hua, mai i te pēhanga 150LB ki te 900LB me te rahi 4″ ki te 8″ me te nui ake.

E rua ngā momo tiwhikete haumaru ahi: API6FA me API607. Ko te tuatahi e whakamahia ana mō ngā takirere paerewa API 6A, ā, ko te tuarua e whakamahia motuhake ana mō ngā takirere whakahaere 90-tohu pērā i ngā takirere pūrerehua me ngā takirere pōro.

E ai ki te paerewa API607, me tahu te takirere kua whakamatautauria i roto i te mura o te 750℃~1000℃ mō te 30 meneti, kātahi ka mahi i ngā whakamātautau 1.5MPA me te 0.2MPA ina whakamataohia te takirere.

I muri i te otinga o ngā whakamātautau o runga ake nei, me mahi anō tētahi atu whakamātautau mahi.

Ka taea e te takirere te paahi i te whakamātautau. Mēnā kei roto te turuturu ine i roto i te whānuitanga paerewa mō ngā whakamātautau katoa o runga ake nei, ka taea anake te paahi.