Zhejiang Daye Flange Co., Ltd. is one of the leading manufacturers and suppliers of duplex steel 2205 welding neck flange in China. With abundant experience, we are committed to providing high quality flanges made in China with competitive price. We warmly welcome you to buy durable duplex steel 2205 welding neck flange in stock here from our factory. Also, quotation is available.
Weld neck flanges are mid-to-high end components for industrial piping. Owing to the tapered long hub design, they achieve superior sealing, temperature and pressure resistance, and are the top choice for pipelines under severe high-temperature and high-pressure working conditions.
Apart from stainless steel, duplex steel 2205 and 2507 are increasingly favored by clients.Duplex Steel 2205 Welding Neck Flange and Duplex Steel 2507 Welding Neck Flange behave more stably than stainless steel in chloride-containing seawater and desulfurization systems.
Our weld neck flanges are produced through forging, heat treatment and precision machining. Stable internal microstructure and standard-compliant mechanical properties guarantee pipeline operational safety.
Parameters
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Standard: |
ASME B16.5, DIN EN 1092-1, GOST 33259, JIS B2220,AWWA-C207, MSS SP-44, Customization |
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Certifications: |
PED/CE, ISO9001, ISO 45001, ISO14001 |
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Size: |
1/2"-160"/Dn10-Dn4000 |
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Rating: |
Class150-Class2500/Pn10-Pn400 |
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Material: |
Stainless steel: 304/304L, 316/316L, 321,316Ti, 347/347H,310S Super stainless steel: 254SMO/F44, 904L Duplex steel: F51/2205, F53/2507 Special alloy steel:Inconel(625,600,718,750,601), Hastelloy(276, C-22, C-4, C, X, B-2), Monel(400, 500), Incoloy(800, 825, 020, 028, 925),etc |
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Facing: |
RF/FF/RTJ/MFM/TG |
Product Advantage
- Superior sealing property and high pressure resistance
The tapered long hub integral butt weld structure resists flange face deformation under pressure temperature cycling for stable sealing.
Applications
High-pressure and high-temperature
Weld neck flanges are recommended for thermal‑power, cogeneration and coal‑chemical projects with continuous operating temperatures above 300°C.
Pipelines with heavy vibration, large temperature variation and frequent start-up & shutdown
Ideal for LNG, refrigeration systems, main circulation lines and CDU joints in liquid cooling systems.
Piping carrying flammable, explosive and toxic media
Suitable for oil, chemical, petrochemical and fertilizer industries.
Test
Mill certificate,100%PMI,Tensile Test,Hardness Test,Impact Test,IC Test,etc.it depends on the requirements.
Cerfitications
PED
PED
ISO 45001
ISO 9001
ISO 14001
Process
Packaging
Outer Packaging:
Fumigated wooden crates/Fumigation-free plywood crates/Customized wooden crates
Inner Packaging:
Plastic flange protectors/Bubble wrap/Cardboard/Protective paper
Packaging can be customized to meet your specific requirements.
FAQ
Q: How to select between Duplex Steel 2205 Welding Neck Flange and Super Duplex 2507 Welding Neck Flanges?
A: Duplex Steel 2205 Welding Neck Flange,its chloride corrosion resistance is inferior to 2507. Not suitable for long-term seawater immersion. Suitable for coastal atmospheric equipment, circulating cooling water, low-chloride fluids and FGD systems.2.
Super Duplex 2507 Weld Neck Flanges,boasting a high PREN of 42~46, it provides outstanding chloride corrosion resistance and tolerates permanent seawater immersion, ideal for seawater desalination, subsea pipelines, sour service oil & gas projects.
Q: What is the MOQ?
A: We don't have MOQ,but the more quantity,the price lower.
Q: What are your payment terms?
A: Perfer TT,L/C also acceptable.
Q: What surface finish do you provide?
A: 125-150AARH/,we can also customize accoding to your requirements.
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