LSAW tube standard:API,ASTM,ASME,ANSI,JIS,DIN,BS,GB,ISO material:API 5L, A53,A106,A333 GR6,Q235,Q345 LSAW tube SSAW ... (Spiral Submerged-arc Welded) Quality standard: API 5L Gas and petroleum pipelines GB ... , L290, L320, L360, L390, L415, L450, L485, L555ASTM A252: Gr.1 Gr.2 Gr.3 Size range:Outer Diamter: 219.1mm ...