Roc-Master Flange Co., Ltd.

Roc-Master is a professional manufacturer of forged flanges and fasteners, as well as one station package supplier for most industrial piping materials. We have two production bases covering a total area around 33,600 m2 and more than 200 employees. Local sales offices locate in Beijing, Nanjing, Chengdu, Huiyang and Qingdao service station. Oversea agents in Saudi Arabia, South-East Asia (Malaysia), UK, France and Oman are helping us to sell our quality products worldwide. Our products mainly used in Oil & Gas, Offshore platform, FPSO, Petrol Chemical, Long distance pipeline, Sea water treatment, Nuclear industry and so on.
Through the years of rich experience, deep industrial knowledge background, good problem solving capability and constantly keeping abreast with the latest technology, Roc-Master has gained high reputation in the industrial field from both domestic and international markets.
Roc-Master Shanghai(which is named Roc-Master Flange Co,. Ltd) is located in Minhang heavy-industry District, Shanghai City with a total area of 3600m2. Roc-Master Shanghai is the headquarters of Roc-Master. We have 100 staff worked here for providing all sales services, Engineering supports, Manufacturing supports, Top Managements, R&D, Training, Inspections and Logistics for package supply. We also do a small part of PMI Testing using Oxford (Was) Test-Master Pro, machining, drilling, CNC machining, CNC Milling. Cladding and weld fabrication in Shanghai.
Roc-Master JiAn(which is named Roc-Master Ji'an Piping products Co Ltd.) is our principal manufacturing base. We have two integrated production lines. One is for bolts and nuts, and the other for forged steel flanges, including cutting, forging, CNC machining, thread rolling, heat treatment, NDE inspection , test lab, packing, and electric plating, etc. Important activities are monitored and recorded in a PLC system. We have our own laboratory to do a whole set of chemical and mechanical performance test, metallurgical structure , hardness test, NDE test, salt-fog test, film thickness test, roughness test, and the lowest temperature of impact test can be -196 degree C.
ISO 9001:2000 - Since 2002
TS Approval - Since 2005
API 17D - Since 2007
PED Approval - Since 2009
DNV Approval - Coming soon
We treat Quality, Customer, Market, Upgrade as the most important.

Products and Service mainly provided:
Specialty Flange
ANSI Flange;Swivel Ring Flange; Anchor Flange; Bulkhead; Norsok Compact Flange; API 6A & 17D Flange; Tube Sheet; Non Standard Flange
NACE MR0175/ISO 15156, NACE MR 0103 compliance
C.S.; S.S.; High Yield Strength Alloy Steel-A694 F52~F70;
CRAs-Inconel 625, Incoloy 825, Duplex F51, Super Duplex F53, F55, Titanium, Monel 400, 904L, Hastelloy C276 and so on;
Specialty Fastener
Stud Bolts, U-Bolts and nuts ONLY
A193 B7(M), L7(M), B8(M), A276 S32760 Etc. A194 2H(M), 4(M), 8(M), SS32760.
Zinc Plating, C.A.D., RocCote Coating (Withford Xylan 1424, 1014, 1010 etc.)
Specialty Welding Service
RocClad Flange, Valve bore, Cylinder intersection automatic Tig Cladding. USA &
Europe cladding systems
Cladding Material as below:
Inconel 625, SS31803, 2205, SS32760, 2507, 904L, 316L & other CRAs weld overlay
Industrial Pressure Piping System shop pre-fabrication
Expert Piping Products One Station Package Supply Service
One stop package supply for Pipes, Fittings, Flanges, Gaskets, Valves, Fasteners...
Professional Staff-
Customer thinking sales and management team, Professional engineering and inspection team, well trained manufacturing and logistics team
One station package supply-
We are familiar with all metallic materials of piping products used in oil and gas industry, such as pipe, flange, pipe fitting, fastener, valve, gasket, instrumentation and so on.
Study & Innovation-
Higher end of flange industry, a package of engineering service, anti-corrosive RocCote coating tech., RocClad weld overlay tech. keeping Study & Improve.

Business Type



Establish Year



ISO 9001:2000

Major markets

North America; South America; Eastern Europe; Southeast Asia; Africa; Oceania; Mid East; Eastern Asia; Western Europe;

OEM/ODM service


Number of employees

100 - 200

Anual sales

50,000,000 - 100,000,000 UDS

Legal representative

for premium members only

Business addresss

Block A No. 1835 Duhui Road,Minhang District, Shanghai 201108, China.

Product Name


Product Name

Compact Flange(RCF)


Contact person

Mr. Forrest Zhang




Block A No. 1835 Duhui Road,Minhang District, Shanghai 201108, China.



Postal code