... :A,B,X42,X52,X56,X60,X65,X70,X80 2.standard:API 5L seamless linepipe The line pipe is ... gas industries.It includes seamless and welding pipe. The pipe end is plain or thread. And the ... connection are welding ends, coupling, bell and spigot .The grades are A,B ... ,SSAW and LSAW. StandardAPI5LOD1/4"-112"MaterialA,B,X42,X52,X56,X60,X65,X70,X80TypeSeamless, weldingEndPlain ...