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DIN 1629 Seamless Steel pipe Of Non Alloys Steels are made of unalloyed steels
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DIN 2391-- cold Drawn or cold rolled steel tube is used in hydraulic & pneumatic cylinder, mechanical and Automotive engineer
DIN 30670 specifies requirements for factory-applied three-layer extruded polyethylene-based coatings, and polyethylene-based coatings for the corrosion protection of steel pipes and fittings.