
Hydraulic steel pipe standard: GB8163, GB8162, DIN2391, EN10305-1, EN10305-4, JIS-G3445, SAE J524, ASTM A519, ASTM A192, DIN1629
High pressure oil pipe main size:OD: 4.0–75mm, WT: 0.70—10.0mm
Oil pipe length:usually, 4000-5500mm length or random length 3000-5800mm, 12000mm length max
Black steel pipe heat treatment:BK, BKS, BKW, GBK, NBK
Surface treatment:Bare tube with oil; white ZN coated; olive green ZM coated, black phosphate





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