Tianjin Zhengda General Steel Pipe Technology Co.,Ltd

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ASTM A252 ERW Carbon Steel Piling Pipe	Carbon Steel Rectangular Pipes And RHS Steel Tubes For Building Material	Small Diameter Spiral Double Submerged ARC Welded Pipe Production Line	ASTM A500 ERW Structural And Construction Steel Pipe
ASTM A53 High Frequency Longitudinal Seam Electric Resistance Welded (ERW) Carbon Steel Round Tube a	API 5L Oilfield Pipeline PE Coated SSAW Spiral Welded Steel Line Pipe In Oil And Gas	Carbon Steel Metal Strip Sheet Slitting Production Line	Pre-galvanized Steel Fence Pipe
Flying Saw Cut-off Machine for Welded Steel Pipe Machine Equipment Production Line	Hot Dipped Galvanized High Frequency Welded Carbon Steel Scaffolding Tube Pipe	GI Square And Rectangular Steel Pipe	Tube and Pipe End Facing and Bevelling Machine
SSAW Steel Linepipe For Petroleum And Natural Gas Transportation	Hot Dipped Galvanized Seamless Carbon Steel Pipe	Ssaw Steel Pipe For Gas And Oil	Linepipe API 5L Grade B X42 X46 X52 PSL-1 PSL-2 with 3 Layer Polyethylene Coating as DIN 30670 Stand