Reliable Supplier of Steel Flange
Our Main Product
ZHONGNUO Is A Leading Forged Flange Manufacturer from China
Over 20 years ZHONGNUO focus on carbon steel flange manufacturing
Established in 2000
Employees: 220
Certificates: TUV ISO9001, PED/AD2000, KS and KR
Area: 27,000 sqm
Capital of the company: USD 2.500.000,00
Monthly output: 1800 tons
Shandong Zhongnuo Heavy Industry Co., Ltd. is a leading manufacturer of steel flanges in Zhangqiu, China. We can produce all types of flanges according to ANSI B16.5, EN1092-1, DIN, BS, UNI, SANS1123, JIS, AS2129, AS4087, AWWA, ISO, and GOST standards. 20 years of experience, excellent quality, and competitive price bring us stable and trusted customers all over the world.
In Zhongnuo, we believe in “survive by quality, develop by innovation”. Our company is certified by TUV ISO 9001, PED/AD 2000, KS, and KR. We also developed our own quality management system, aiming to provide our customers with stable and premium products.
Why Choose Us
We Are Leader in Flange Market
With more than 20 years of experience working with flange stockiest, distributors, traders and engineering in large and small, we can manufacture and customize all types of flanges according to international standards.
Quality Control
We have been committed to quality assurance and this has allowed us to stay in the market for so many years. Our well-trained QA and QC team ensure that our products meet the highest standards.
Real Factory
As a professional flange manufacturer, Zhongnuo has advanced production line and lab. High quality, fast delivery, and high cost -effective, we can meet the manufacturing and customization of all flange types.
High Responsibility
We always look for long-term relationships with our clients and taking their needs seriously. Many of our clients worked with us for many years and now they still choose us. We always aim for a sustainable business model that benefits both sides.
Warranty Service
We understand that when you purchase something, you expect it to work perfectly. But sometimes things don't go as planned. With our efficient after-sales procedures, you can get quick solutions within 1-3 business days.
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Want to learn more about us? you can contact us immediately to ask a question or request a quick quote for your business.
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How the carbon steel flanges manufactured
1. Forging
The red-hot billet is formed by forging. The flange blank will obtain stable mechanical properties when through heat treated process.
2. Machining
Removes the oxide layer on the flange surface, polishing process makes the flange appears smooth and bright surface.
3. Drilling
Drilling according to the hole diameter and hole number.
4. Deburring
Removing sharp edges.
5. Stamping
Stamping according to the flange size, Pressure value, international standard, material, flange type, heat number, etc.
6. Surface treatment
The most popular surface treatment include anti-rust oil, paint, hot-dip galvanizing, and electro-galvanizing.
7. Inspection
Quality inspection before delivery, every batch of shipment will accompany with test report.
8. Packing
The packaging should be suitable for sea and land transportation. The packaging should be convenient for customers to tally and check the goods.
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