... -89mmLength5-14m,R1 R2 R3 Length can be manufactured by the consumer’s requirementsMaterial20# ,10# ,45#,Q345B, X42,X52,X60,X70Place ... .special design available according to customer requirement2.all the production process are made under the ISO9001 and ISO14001 ASTM A106-2006 SEAMLESS CARBON ...