... 6-18meters 4.Accept the third inspection:SGS,BV etc High Frequency Welding Pipe1.OD:219-1422mm2.THK:6-60mm3.Length:6- ... .Standard:API/ASTM/ANSL/EN/DIN/GB7.Application:low and medium pressure boiler,ship,liquid service,petroleum cracking,chemical ... ferticizer equipment,drawing-oil-equipment and structure purposes8.Surface:oiled or black painted rust9.packing: ...