The diameter of pipe:219mm-3500mm, wallthickness:6mm-30mm, standard:API 5L, ASTM A252, steel grade: API A,B,X42,X46,X52,X56,X60,X65,X70. We accept the third party inspection such as SGS, BV,GL etc. Spiral steel pipe 1.OD:219mm-3500mm 2.Thickness:6mm-30mm 3.Standard: can be required 4.All kinds of specification 5.Good quality with competitive price 6.Packing: standard export packing The company can produce various sizes of longitudinally and spirally welded steel pipes according to the following standars such as API ASTM JIS BS DIN and GB etc. 0086 13921994182-->Bossling Chris.hwsteel (at)gmail(dot)com