Import Butt Welding Neck Flange — Buy in Bulk from Supplier in China

The butt welding neck flange offered by Wenzhou Fengyuan Flange Co., Ltd is engineered for high-pressure piping systems, featuring a tapered hub that reduces stress concentration at the base of the flange. It supports pipe sizes from DN15 to DN2000, equivalent to 1/2” to 36” nominal bore, and is manufactured to meet ASME B16.5 and ANSI B16.47 standards for pressure integrity and dimensional accuracy. The flange’s design ensures a smooth transition to the pipe’s internal diameter, minimising turbulence and erosion in fluid flow.

Constructed from carbon steel, stainless steel, or alloy materials, these flanges are available in standard grades such as ASTM A105 for carbon steel and ASTM A182 F316 for stainless steel, with typical pressure classes ranging from 150 to 2500. The welding neck’s long taper provides reinforcement against bending stresses, making it suitable for extreme temperature and pressure conditions typical in oil and gas, chemical, and water treatment industries. Surface finishes are typically as-forged or machined to meet project-specific roughness requirements.

Industrial buyers source these flanges for critical applications like pipeline construction, refinery setups, and power plants, where leak-proof joints are non-negotiable. The supplier’s product is designed for butt welding, ensuring a full-penetration weld joint that matches the pipe’s strength. Trade terms such as FOB or CIF are negotiable, with packaging typically in wooden crates or pallets to prevent damage during transit. Buyers should confirm material test certificates and third-party inspection options to validate compliance with project specifications.

Wenzhou Fengyuan Flange Co., Ltd operates from the Yongxing Industrial Area in Wenzhou, Zhejiang Province, China. The company specialises in the production of industrial flanges, with a focus on components for high-pressure and high-temperature applications. Its product range includes welding neck flanges, slip-on flanges, and blind flanges, catering to sectors such as petroleum, chemical, and water systems.

The supplier’s profile indicates an imported tier classification and a harbor trust tier, with no recorded response rate or average response time in the available data. This suggests a focus on export-oriented production, though buyers are advised to confirm communication channels and lead times directly. The company’s location in a key industrial hub for flange manufacturing in China positions it as a practical choice for bulk sourcing, provided specifications and certifications are verified prior to order placement.