WE MANUFACTURE STEEL PIPE Spiral steel pipe from 20" to 64" ERW steel pipe from 4" to 12" HSS steel pipe from 4x4 to 10x10 API 5L certification Welded piping provides an excellent straight on fluid handling service, as well as structural use with excellent aesthetic appearance. Gives a precise dimensional tolerance, including roundness, straightness and thickness. Our products are made from top quality raw material under a continuous process consisting of electric resistance welded (ERW) longitudinal seam. We apply the API 5L, ASTM A53, AWWA, among others. Show more Show less