China Suppliers Seven Corner Forging - Premium Petroleum Flanges from Factory-Approved Manufacturer
Product Introduction
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Precision-forged Heptagonal Component for Critical Oil & Gas Applications
This advanced heptagonal forging represents a proprietary prototype co-developed with CNPC (China National Petroleum Corporation) for high-stakes petroleum industry applications. Manufactured from certified 31603 stainless steel via single-billet integral forging, the component achieves exceptional structural integrity and corrosion resistance. Our precision manufacturing protocol includes: rough machining, solution annealing, CNC precision finishing, deep-hole boring, and API-spec thread tapping. Engineered to withstand extreme downhole environments, it delivers unmatched dimensional accuracy (ISO 2768-m) and material homogeneity for critical sealing and load-bearing functions in next-generation drilling systems.
Why Choose Us?
We DHDZ manufacture forged flanges which meet international quality standard: DIN, EN1092-1, BS4504, ANSI, API, MSS, AWWA, UNI, JIS, SANS, GOST, NFE, ISO, AS, etc. We DHDZ manufacture 75 lbs, 150lbs, 300lbs, 600lbs, 900lbs, 1500lbs, 2500lbs, PN6, PN10, PN25, PN40, PN63, PN64, PN100, GOST 12820 and GOST 12821, PN0.6 MPA, PN1.0 MPA, PN1.6 MPA, PN2.5MPA PN4.0MPA, SANS1123 or SABS 1123, 600kpa, 1000kpa, 1600kpa, 2500kpa, 4000kpa flange ratings as per purchaser's specification.
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