Roc-Master Flange Co., Ltd. is a professional manufacturer and supplier of piping products. We have more than ten years' experience in serving for the projects related to oil and gas, offshore, petroleum, petrochemical, and marine industries.

Our production scope is listed as follows:
Forged flanges:
1) Material:
Carbon Steel:
ASTM A105, ASTM A350 LF2, LF6
High Yield Strength Alloy Steel:
ASTM A694 F52, F60, F65, F70,
Stainless Steel:
ASTM A182 F304, 304L, F316, 316L, F321
Duplex and Super Duplex Stainless Steel:
ASTM A182 F51, F53
Nickel Alloy Steel:
ASME SB564 UNS N06600, N06625, N08800, N08825

2) Application Codes and Specification:
ANSI B16.5, ANSI B16.47 (MSS SP-44),
API 6A, API 17D
NORSOK L-005
NACE MR0175, ISO 15156
ASME V, ASME VIII, ASME IX
DNV-OS-101

Weld Overlay, Cladding:
Cladding (Weld Overlay) material: Inconel 625, Inconel 825, Duplex SS31803, Super Duplex SS32750, SS316, SS316L and so on

Full automatic Hot-Wire TIG Welding station
Main parts of the welding system:
ESAB Sweden DC TIG Weld Machine: Aristo Tig 400
Fronius Austria Hot-wire Power Source: TP 1500 RC/HD
Mitsubishi Japan PLC and HMI system

Forged fittings:
1) Elbows, tees, reducing couplings, unions, couplings, nipples, caps, bushings, crosses, weldolets, threadolets, flangeolets
2) Material: ASTM A105, ASTM A350 LF2, ASTM A694 F52, ASTM A694 F60, ASTM A694 F65, ASTM A694 F70, ASTM A182 F304, ASTM A182 F304L, ASTM A182 F316 and ASTM A182 F316L
3) Specification: ANSI B16.11, MSS SP-79, MSS SP-83, MSS SP-95 and MSS SP-97

Bolts, nuts and washers:
1) Stud bolts (threaded rods) and hex bolts:
a) Material: ASTM A193 B7,A320 L7, ASTM A307, ASTM A325, A490, ASTM B150 C63000, Duplex SS31803
b) Specification: UNC, UNF ANSI B1.1, DIN 975 ANSI B18.2.1, ANSI B18.2.6 DIN931, DIN933
2) Nuts:
a) Material: ASTM A194 2H, ASTM A563, ASTM B150 C63000, Duplex SS31803
b) Specification: ANSI B 18.2.2, DIN 934,DIN985
3) Flat and spring washers:
a) Material: carbon steel and stainless steel, ASTM B150 C63000, Duplex SS31803
b) Specification: ANSI B 18.22.1, ANSI B18.21.1 DIN125, DIN127
4) Coating:
ZINC, H.D.G, CAD, Cadmium, XYLAN, PTFE, FLUORCARBON, BLACK

Butt weld pipe fittings:
1) Material: WPHY-42, WPHY-46, WPHY-52, WPHY-56, WPHY-60, WPHY-65, WPHY-70, ASTM A234 WPB, ASTM A403 WP 304, ASTM A403 WP 304L, ASTM A403 WP 316, ASTM A403 WP316L
2) Specification: ANSI B16.9/16.28, MSS SP-43, MSS SP-75

EMT and RGS Rigid Steel Conduit:
1) Specification: UL 797, UL 6, PVC coated, Epoxy Coated

Welded pipes / tubes:
1) Outside diameter: 8mm to 89mm.
2) Wall thickness: 0.5mm to 4mm
3) Finish: plain or hot dip galvanized

There are two full-owned production bases and more than 150 skillful workers and intelligent staffs in our company. We attach great importance to quality control and we have set up our professional quality control department.

Proudly speaking, we have five competent technical and quality control engineers with engineering bachelor degrees and more than 35 years' relevant experience.

ISO 9001 and API 17D certified quality standard is implemented throughout the whole production process from raw material to finished products. Our products are widely accepted by many world famous multinational companies, such as ABB Lummus, AMEC, BASF, BECHTEL, CNOOC, COOEC, CPPMEC, FLUOR, Technip, JGC, SHELL, ConocoPhillips, Aramco, PetroVietnam, Cameron Valve, Tyco flow control, APL single point mooring system, APP, National Oilwell Company, ROCKWELL, VETCOGRAY, IVANHOE MINES. We have exported products to more than 10 countries with the export value above USD 3,800,000. And now we are making more efforts to do better. You are warmly welcomed to our company for quality products, reasonable price and best services.

Company Name	Roc-Master Flange Co., Ltd.
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Operational Address	Block A No. 1835 Duhui Road,Minhang District, Shanghai 201108, China.,

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