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Trusted by 4,000+ partners worldwide. 12+ years of precision manufacturing, 120+ CNC machines, and ISO-certified quality for industrial applications in oil, gas, nuclear, and chemical sectors.
Zhejiang Chengjiu Pipeline Co., Ltd. is a leading manufacturer and exporter of industrial flanges, pipe fittings, and stainless steel valves. With a registered capital of $66.88 million USD, we operate a 15,000 square meter facility equipped with over 120 CNC machines.
We specialize in the design, development, manufacturing, testing, and sales of high-performance components used in power stations, petroleum, chemical processing, nuclear power, and environmental protection systems.
Our products meet international standards including ANSI, ASME, DIN, EN, JIS, GOST, and BS, with sizes from DN10–5000 (½" to 80") and pressure ratings from 0.25–42.0 MPa (150 lb to 2500 lb).
High-quality stainless steel flanges and BW pipe fittings engineered for durability, leak resistance, and extreme temperature performance (-196°C to 1350°C).
Flat design ideal for low-pressure systems. Cost-effective and easy to install.
ANSI, DIN, JIS
Used to seal pipe ends. Ideal for pressure testing and system isolation.
DN15–DN2000
Long radius (LR) and short radius (SR) options for smooth flow redirection.
Sch5–Sch160
Strong butt-weld connection for high-pressure and high-temperature applications.
150–2500 lb
Easy installation by sliding over pipe. Ideal for low-stress systems.
Class 150, 300, 600
Equal and reducing tees for branching pipelines in chemical and petro industries.
DN20–DN1200
Smooth diameter transition with aligned centerlines for uniform flow.
Butt-Weld Type
Seals the end of a pipe run. Used in dead-end systems and testing.
ASME B16.9State-of-the-art facility with full in-house production from forging to packaging.
High-precision machining ensures tight tolerances and consistent quality.
ISO, API, CE, and other international standards compliance.
Extreme temperature resistance for cryogenic and high-heat applications.
Serving clients in Europe, Africa, Middle East, Southeast Asia, and Australia.
1,000 tons in stock for immediate shipment. Custom orders in 15–30 days.
We manufacture flanges and fittings in stainless steel (304, 316, 321, etc.), carbon steel, alloy steel, and duplex/super duplex materials.
Our products meet ANSI, ASME, DIN, EN, JIS, GOST, BS, API, AWWA, and other international standards.
We produce over 10,000 tons annually with 120+ CNC machines and a 15,000 m² facility.
Yes, we provide OEM and ODM services. Send us your drawings or specifications for a quote.
Stock items ship within 3–7 days. Custom orders take 15–30 days depending on complexity.
Reach out for quotes, catalogs, or technical support. We respond within 24 hours.
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