Hebeizhonghai Steel Pipe Manufacturing CO,.LTD , as a big family company , deal in producing and export directly of Carbon steel seamless pipe and ERW pipe . Our main production range is from 1/2" (21mm) to 48" (1210mm ) . sch 30/40/80/std/XS and so on. our main export standard is API 5L GB/ASTM A106/A53 Gr.B and so on. we can do black varinish coating / Bevelled ends/ plastic caps .