Roc-Master - Roc-Master is certified by TUV to manufacture Stud bolt and Heavy hex nut according to NORSOK standard M-650.

Roc-Master supplied tubular products to China Petroleum Pipeline International (Libya)
Hastelloy C276 flange and Hastelloy B-2 flushing ring
Roc-Master successfully enter into the approved vendor list of ADNCO
Petrochemical Int'l Co., Ltd.
X52 Pipes are available in stock

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Roc-Master is certified by TUV to manufacture Stud bolt and Heavy hex nut according to NORSOK standard M-650.

Roc-Master is certified by TUV to manufacture Stud Bolt and Heavy Hex Nut according to NORSOK standard M-650. Material Designation: UNS S32760 ASTM A1082/A1082M

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Roc-Master is certified by TUV to manufacture Stud bolt and Heavy hex nut according to NORSOK standard M-650.