
Weld Neck Flange
PRODUCT PARAMETERS
The Weld Neck Flange is a widely used piping fitting designed for connections in high-pressure and high-temperature environments. Its characteristic neck extension provides greater strength and load-bearing capacity.
The Weld Neck Flange is typically welded to the pipeline, and the weld joint offers high strength, making it suitable for harsh conditions such as high pressure, high temperature, and strong corrosion. Its design helps reduce stress concentration, ensuring the stability and safety of the piping system. (Custom manufacturing available)
Application Fields: Widely used in petroleum, chemical, oil and gas transportation, power and energy, metallurgy, shipbuilding, pharmaceutical, heating systems, and long-distance pipelines. Suitable for demanding applications involving steam, petroleum products, gases, flammable and explosive media, and corrosive substances.
Description
| Item | Specification |
| Product Size | DN15–DN1200 (1/2″–48″) and other common specifications, customizable |
| Pressure Rating | PN2.5–PN400 / CLASS150, CLASS300, CLASS600, CLASS900, CLASS1500, CLASS2500 |
| Manufacturing Standards | Compliant with GB, ANSI, DIN, JIS and other international standards |
| Material | Carbon steel, stainless steel, alloy steel, pipeline steel, low-temperature steel, duplex steel, etc. |
| Surface Treatment | Pickling and passivation, oil coating for rust prevention, painting, hot-dip galvanizing, etc. |
| Origin | China |
| Connection Type | Butt Welding |
| Temperature Range | -50°C ~ +450°C (specific temperature resistance depends on material and application conditions) |
FAQs
We are a professional manufacturer of flanges and pipe fittings located in Mengcun Hui Autonomous County, Cangzhou, China. Our factory covers approximately 50,000 square meters and operates more than 10 specialized production lines, allowing us to provide factory-direct products, stable quality control, and reliable production capacity.

Yes. In addition to standard products, we provide customized flanges and pipe fittings according to customers’ drawings, technical specifications, material requirements, dimensions, pressure ratings, surface treatments, and application conditions. Our production facilities support forging, pressing, machining, cold forming, hot extrusion, heat treatment, and other manufacturing processes.







We manufacture flanges and pipe fittings in carbon steel, stainless steel, and alloy steel. Products can be manufactured according to major international standards, including ASME, GB, EN, JIS, DIN, BS, and GOST. Please provide the required material grade, standard, size, pressure rating, and product type when requesting a quotation.
We have established a full-process quality control system covering raw material inspection, production monitoring, dimensional inspection, heat treatment, machining, surface finishing, and final testing. Available testing capabilities include spectral analysis, hydrostatic testing, and non-destructive testing. Our quality management system is certified according to ISO 9001.
The production time depends on the product type, material, dimensions, quantity, technical standard, and customization requirements. With an annual production capacity of more than 30,000 tons and convenient access to Tianjin Port, we can support both batch production and customized project orders. A detailed delivery schedule will be confirmed after reviewing your specifications.









