XYT GROUP is one professional manufacturer for Spiral Steel pipe, ERW pipe, Seamless pipe, Casing pipe.Spec:GRB- ... steel pipe, ERW pipe, SSAW pipe. the specifications are following:* SPIRAL STEEL PIPE *OUTSIDE.D 219--3220mm W.T 6--18mm ... ,K55,N80-1,N80Q,L80Q,P110, etc API 5L GRB Spiral steel pipe