China Suppliers Seven Corner Forging Petroleum Flange - Factory-Produced Quality Assurance
Product Introduction
GB3077-2015
150MPA
31603
Forging, roughing, heat treatment, finishing, boring and washing, tapping.
Strong acid and alkali resistance, high temperature resistance, long service life, smooth surface, beautiful appearance, high pressure resistance
Chemical and petroleum industries.
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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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Frequently Asked Questions
The component is manufactured according to the GB3077-2015 standard and is made from high-quality 31603 stainless steel.
This product is engineered to withstand high-pressure environments, featuring a pressure rating of 150MPA.
Our comprehensive production process includes single-billet integral forging, roughing, heat treatment (solution annealing), CNC precision finishing, boring and washing, and tapping.
It is specifically designed for critical oil and gas applications, chemical industries, and high-stakes drilling systems where corrosion resistance and structural integrity are essential.
We manufacture forged flanges in compliance with major global standards, including DIN, EN1092-1, BS4504, ANSI, API, MSS, AWWA, UNI, JIS, SANS, GOST, NFE, ISO, and AS.
Yes, we manufacture flanges with ratings ranging from 75 lbs to 2500lbs, and PN0.6 MPA to PN100 / 4000kpa, fully customized according to the purchaser's specifications.