Nkọwa ASTM A179, A192, A210 na-ekpuchi tube na-enweghị eriri Carbon maka ọrụ okpomọkụ dị elu.A na-eji ọkpọkọ ndị a na-agbanwe ọkụ, condensers, ihe dị elu nke okpomọkụ kwesịrị inye nkọwapụta A 530.

GB5310-2008 na-adabara na tubes enweghị nkebi maka ịme ọkụ ọkụ uzuoku nke nrụgide ya dị elu ma ọ bụ karịa na tubes enweghị nkebi na-eji dị ka pipeline.

ASTM A179 / A179M – 90a ọkọlọtọ nkọwapụta maka enweghị nkebi oyi-Drawn ala-carbon ígwè okpomọkụ-exchangeer na condenser Tubes.

Nkọwa ọkọlọtọ ASTM A192/A192M maka tubes carbon steel na-enweghị nkebi maka ọrụ nrụgide dị elu.

Nkọwa ọkọlọtọ ASTM A210/ASME SA210 maka igwe na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ.