API 5L X42 X46 X52 X65M X70 Submerged Arc Welding Pipe
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Carbon Standard API 5L Material X46 Lsaw Pipe
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Oil Pipeline API 5L PSL1 X42 Straight Seam Welded Pipe
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DIN 2458 API 5L X52 X56 X65 Electric Resistance Welded Tube
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Oil Filed API 5L X52 S235 Electric Resistance Welded Tubes
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