Weld neck flange is a device that two large diameter pipelines connect each other,usually two flange piece and a number of fastening bolts, Welding neck flange is provided with good plastic property and low strength,and become hard after adding defined amount carbon element. Its connection is likely to need to withstand very high tensile, compression as well as torsion strength. Welding neck flange has the advantages of its convenience, simple manufacturing, low cost and wide use. But due to its poor stiffness, so it may not be used for flammable, explosive as well as extremely hazardous situations.There are two types of sealing faces:flat face and raised face. Welding neck flange needs to consume much welding rod can not afford the act of high temperature, repeated bending,high pressure as well as temperature fluctuatio

Cangxian Huahai Pipe Fittings CO., Ltd ,as a leading manufacturer of pipe fittings , located in famous metal fittings center ,Cangzhou City, Hebei Province China.

For more than 30 years, Huahai has worked diligently to build a strong, vibrant tradition of making connections — from pipe to pipe and people to people.

Agility and ability are what assure your future as an independent wholesaler. The agility to provide quality products and value-added services quickly, and the ability to price competitively, are the qualities needed to provide your customers with the service they expect. We can help!


Professional manufactured ability in pipeline and oil filed that win high reputation at home and abroad. Our comprehensive line of products — customized to your needs — includes:carbon steel pipe nipple ,stainless steel pipe nipple, brass and aluminum pipe nipple, swage nipple and bull plug, coupling ,grooved and plain-end fittings, bend fittings, stainless steel hex nipples, hose nipples, unions, elbow ,caps, tees, cross, plugs, bushings, valves and much more. All products meet international standards: PT, BSPT, DIN, NPT & GOST.
We believe that responsive and accessible customer support is what makes the difference between simply delivering products — and delivering solutions..

In Huahai Group, the only thing we are stubborn about is quality and value.