3PE anti-corrosion steel pipe
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GB/T23257-2009 "Technical Standard for Buried Steel Pipeline Polyethylene Anti-corrosion Coating", SY/T0413-2002 "Technical Standard for Buried Steel Pipeline Polyethylene Anti-corrosion Coating", DIN30670-91 German "Polyethylene Coating for Steel Pipes and Fittings" Layer technical standard", CAN/CSA-Z245.21-M92 Canada "Technical standard for polyethylene anti-corrosion coating on outer wall of steel pipe"
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Yanshan County Industrial Development Zone, Hebei Province
