Hot dip galvanized square and rectangle steel tube
Secondary Or Not
Non-secondary
Standard
API, API 5L, ASTM A106-2006, ASTM A53-2007, BS 1387, BS EN10219, DIN 1626, DIN EN 10216-1-2004, DIN EN 10305, DIN 2444, DIN EN 10025, JIS G3445-2006, JIS G3441, GB 3087-1999, GB/T 3089-1982