X70 spiral welded pipe Material: X42, X52, X46, X56, X65, X70, L235 ... 5L, SY/T 5037, GB/T 9711 219-2420mmSpiral Welded Pipe 1) Material: X42, X52, X46, X56, X65, ... clients special requirement and application of steel pipe, we can provide different anti-corrosion protection for ... steel pipe and pipe with flange. External coating: -multi-layer FBE ( ...