ʻO nā paipu kila maʻemaʻe no ka haki ʻana i ka ʻaila, hoʻoheheʻe ʻia e like me nā paipu fumace, nā paipu hoʻololi wela a
pipelines i loko o ka aila a me ka refinery mea kanu.High quality carbon structural steel grades he 20g,
20mng a me 25mng; Alloy structural steel grades: 15mog, 20mog, 12crmog, 15CrMoG, 12Cr2MoG, 12CrMoVG, etc.