ERW • DSAW • EFW • SMLS • T&C • CW
Arcelormittal
Tubacex
Marcegaglia
S&T International
Mannesmann
Hyundai
Bristol
Tenaris
US Steel
Vallourec
Husteel
TMK
Pexco
North Star
Haynes
Outokumpu
Wheatland
SEAH
Sharon Tube
Kuze
Sanyo
Tubos Reunidos
Swepco
Sandvik
Schoeller Bleckmann
Berg
JFE
Kobe
NKK
Nippon Sumitomo
PTC Alliance
Special Metals
Wyman Gordon
